Solar cell module, solar cell device, and method for manufacturing solar cell module

Abstract

According to the present invention, a power-generating body of a solar cell module includes a first protective member, a second protective member, a solar cell part, and an encapsulant. The solar cell part includes a plurality of solar cells and a plurality of wiring materials. The power-generating body is rectangular in plan view, with a first length between 1316 mm and 1377 mm in a second direction along the long side and a second length between 778 mm and 804 mm in a first direction along the short side. Each of the solar cells is rectangular in plan view, with two long sides in the second direction and two short sides in the first direction. In plan view, in the first direction, the sum of the distance between a first long side and the solar cell part and the distance between the solar cell part and a second long side is less than half the length of a solar cell in the first direction, and in the second direction, the sum of the distance between a first short side and the solar cell part and the distance between the solar cell part and a second short side is less than half the length of a solar cell in the second direction.

Description

Solar cell module, solar cell device, and method for manufacturing solar cell module CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority from Japanese Application No. 2023-170494 (filed September 29, 2023), the entire disclosure of which is incorporated herein by reference.

[0002] The present disclosure relates to a solar cell module, a solar cell device, and a method for manufacturing a solar cell module.

[0003] Solar panels are installed on a mounting base or other mounting structure, such as the roof or exterior wall of a building such as a house or factory. This mounting base includes a mounting unit that can flexibly accommodate different sizes of solar panels (see, for example, the description in Patent Document 1).

[0004] In recent years, there has been an increasing demand for reducing installation errors when fixing solar cell modules to installation targets in solar cell modules and solar cell devices.

[0005] JP 2015-108243 A

[0006] A solar cell module, a solar cell device, and a method for manufacturing a solar cell module are disclosed.

[0007] A first aspect of the solar cell module includes a power generating body. The power generating body includes a first protective member having a flat or sheet-like translucency, a second protective member having a flat or sheet-like translucency, a solar cell unit, and a sealing material. The first protective member has a first surface and a second surface opposite the first surface. The second protective member has a third surface facing the second surface and a fourth surface opposite the third surface. The solar cell unit includes a plurality of solar cells arranged in a matrix along the second surface in a gap between the first protective member and the second protective member. The sealing material is positioned in the gap to seal the solar cell unit. When the first surface is viewed from above, the power generating body has a rectangular shape having first and second long sides that face each other in a first direction and first and second short sides that face each other in a second direction. The first long side and the second long side each face along the second direction. When the first surface is viewed in a plan view, the power generating element has a first length of 1,316 mm to 1,377 mm along the second direction. The first short side and the second short side are each positioned along the first direction. When the first surface is viewed in a plan view, the power generating element has a second length of 778 mm to 804 mm along the first direction. When the plurality of solar cells are viewed in a plan view from the first surface side, each of the plurality of solar cells has a rectangular shape having a third long side and a fourth long side and a third short side and a fourth short side. When the plurality of solar cells are viewed in a plan view from the first surface side, each of the plurality of solar cells has a third length in a direction along each of the third long side and the fourth long side, and a fourth length in a direction along each of the third short side and the fourth short side. The solar cell section includes a plurality of solar cell strings, a plurality of first wiring members, and a plurality of second wiring members.Each of the plurality of solar cell strings includes two or more solar cells arranged in a third direction along the third short side and the fourth short side of the plurality of solar cells, and a plurality of third wiring members electrically connecting each two adjacent solar cells among the two or more solar cells, thereby electrically connecting the two or more solar cells in series. Each of the plurality of first wiring members electrically connects two adjacent solar cell strings among the plurality of solar cell strings. The plurality of second wiring members includes a first second wiring member electrically connected to a solar cell string located at an end of the plurality of solar cell strings in the fourth direction in which the plurality of solar cell strings are arranged, and a second second wiring member electrically connected to a solar cell string located at an end of the plurality of solar cell strings in the direction opposite to the fourth direction. When the plurality of solar cell strings are viewed in plan from the first surface side, in each of the plurality of solar cell strings, each of the plurality of third wiring members is located along the third direction, and the distance in the third direction between each two adjacent solar cells among the two or more solar cells is a first distance. When the first surface is viewed in a plan view, the distance between the first long side and the solar cell unit in the first direction is a first distance, the distance between the solar cell unit and the second long side in the first direction is a second distance, the distance between the first short side and the solar cell unit in the second direction is a third distance, and the distance between the solar cell unit and the second short side in the second direction is a fourth distance. The arrangement of the plurality of solar cells is a first arrangement in which the third long side and the fourth long side of each of the plurality of solar cells are positioned along the second direction and the third short side and the fourth short side of each of the plurality of solar cells are positioned along the first direction. A first condition is satisfied in which the sum of the first distance and the second distance is less than half the fourth length. A second condition is satisfied in which the sum of the third distance and the fourth distance is less than half the third length.

[0008] A second aspect of the solar cell module includes a power generating body. The power generating body includes a first protective member having a flat or sheet-like translucency, a second protective member having a flat or sheet-like translucency, a solar cell unit, and a sealing material. The first protective member has a first surface and a second surface opposite the first surface. The second protective member has a third surface facing the second surface and a fourth surface opposite the third surface. The solar cell unit includes a plurality of solar cells arranged in a matrix along the second surface in the gap between the first protective member and the second protective member. The sealing material is positioned in the gap to seal the solar cell unit. When the first surface is viewed from above, the power generating body has a rectangular shape having first and second long sides that face each other in a first direction and first and second short sides that face each other in a second direction. The first long side and the second long side each face along the second direction. When the first surface is viewed in a plan view, the power generating element has a first length of 1338 mm to 1377 mm along the second direction. The first short side and the second short side are each positioned along the first direction. When the first surface is viewed in a plan view, the power generating element has a second length of 778 mm to 804 mm along the first direction. When the plurality of solar cells are viewed in a plan view from the first surface side, each of the plurality of solar cells has a rectangular shape having a third long side and a fourth long side and a third short side and a fourth short side. When the plurality of solar cells are viewed in a plan view from the first surface side, each of the plurality of solar cells has a third length in a direction along each of the third long side and the fourth long side, and a fourth length in a direction along each of the third short side and the fourth short side. The solar cell section includes a plurality of solar cell strings, a plurality of first wiring members, and a plurality of second wiring members.Each of the plurality of solar cell strings includes two or more solar cells arranged in a third direction along the third short side and the fourth short side of the plurality of solar cells, and a plurality of third wiring members electrically connecting each two adjacent solar cells among the two or more solar cells, thereby electrically connecting the two or more solar cells in series. Each of the plurality of first wiring members electrically connects two adjacent solar cell strings among the plurality of solar cell strings. The plurality of second wiring members includes a first second wiring member electrically connected to a solar cell string located at an end of the plurality of solar cell strings in the fourth direction in which the plurality of solar cell strings are arranged, and a second second wiring member electrically connected to a solar cell string located at an end of the plurality of solar cell strings in the direction opposite to the fourth direction. When the plurality of solar cell strings are viewed in plan from the first surface side, in each of the plurality of solar cell strings, each of the plurality of third wiring members is located along the third direction, and the distance in the third direction between each two adjacent solar cells among the two or more solar cells is a first distance. When the first surface is viewed in a plan view, a distance between the first long side and the solar cell unit in the first direction is a first distance, a distance between the solar cell unit and the second long side in the first direction is a second distance, a distance between the first short side and the solar cell unit in the second direction is a third distance, and a distance between the solar cell unit and the second short side in the second direction is a fourth distance. When the arrangement of the plurality of solar cells is a first arrangement in which the third long side and the fourth long side of each of the plurality of solar cells are positioned along the second direction and the third short side and the fourth short side of each of the plurality of solar cells are positioned along the first direction, a first condition is satisfied that the sum of the first distance and the second distance is less than half the fourth length, and a second condition is satisfied that the sum of the third distance and the fourth distance is less than half the third length.When the arrangement of the plurality of solar cells is a second arrangement in which the third long side and the fourth long side of each of the plurality of solar cells are positioned along the first direction and the third short side and the fourth short side of each of the plurality of solar cells are positioned along the second direction, the sum of the first distance and the second distance satisfies the third condition that is less than half of the third length, and the sum of the third distance and the fourth distance satisfies the fourth condition that is less than half of the fourth length.

[0009] A third aspect of the solar cell module includes a power generating body. The power generating body includes a first protective member having a flat or sheet-like translucency, a second protective member having a flat or sheet-like translucency, a solar cell unit, and a sealing material. The first protective member has a first surface and a second surface opposite the first surface. The second protective member has a third surface facing the second surface and a fourth surface opposite the third surface. The solar cell unit includes a plurality of solar cells arranged in a matrix along the second surface in the gap between the first protective member and the second protective member. The sealing material is positioned in the gap to seal the solar cell unit. When the first surface is viewed from above, the power generating body has a rectangular shape having first and second long sides that face each other in a first direction and first and second short sides that face each other in a second direction. The first long side and the second long side each face along the second direction. When the first surface is viewed in a plan view, the power generating element has a first length of 1,420 mm to 1,471 mm along the second direction. The first short side and the second short side are each positioned along the first direction. When the first surface is viewed in a plan view, the power generating element has a second length of 1,153 mm to 1,185 mm along the first direction. When the plurality of solar cells are viewed in a plan view from the first surface side, each of the plurality of solar cells has a rectangular shape having a third long side and a fourth long side and a third short side and a fourth short side. When the plurality of solar cells are viewed in a plan view from the first surface side, each of the plurality of solar cells has a third length in a direction along each of the third long side and the fourth long side, and a fourth length in a direction along each of the third short side and the fourth short side. The solar cell unit includes a plurality of solar cell strings, a plurality of first wiring members, and a plurality of second wiring members.Each of the plurality of solar cell strings includes two or more solar cells arranged in a third direction along the third short side and the fourth short side of the plurality of solar cells, and a plurality of third wiring members electrically connecting each two adjacent solar cells among the two or more solar cells, thereby electrically connecting the two or more solar cells in series. Each of the plurality of first wiring members electrically connects two adjacent solar cell strings among the plurality of solar cell strings. The plurality of second wiring members includes a first second wiring member electrically connected to a solar cell string located at an end of the plurality of solar cell strings in the fourth direction in which the plurality of solar cell strings are arranged, and a second second wiring member electrically connected to a solar cell string located at an end of the plurality of solar cell strings in the direction opposite to the fourth direction. When the plurality of solar cell strings are viewed in plan from the first surface side, in each of the plurality of solar cell strings, each of the plurality of third wiring members is located along the third direction, and the distance in the third direction between each two adjacent solar cells among the two or more solar cells is a first distance. When the first surface is viewed in a plan view, the distance between the first long side and the solar cell unit in the first direction is a first distance, the distance between the solar cell unit and the second long side in the first direction is a second distance, the distance between the first short side and the solar cell unit in the second direction is a third distance, and the distance between the solar cell unit and the second short side in the second direction is a fourth distance. The arrangement of the plurality of solar cells is a second arrangement in which the third long side and the fourth long side of each of the plurality of solar cells are positioned along the first direction and the third short side and the fourth short side of each of the plurality of solar cells are positioned along the second direction. A third condition is satisfied in which the sum of the first distance and the second distance is less than half the third length. A fourth condition is satisfied in which the sum of the third distance and the fourth distance is less than half the fourth length.

[0010] A first aspect of the solar cell device includes a plurality of solar cell modules according to any one of the first to third aspects. The third length is the standard length of the solar cell in a direction along one side of the solar cell when the rectangular light-receiving surface of the solar cell is viewed in plan. The standard length includes any one of a first standard length of 200 mm or more, a second standard length shorter than the first standard length, and a third standard length longer than the second standard length and shorter than the first standard length. The plurality of solar cell modules are electrically connected in series. The plurality of solar cell modules include two or more types of solar cell modules selected from the group consisting of a first type of solar cell module, a second type of solar cell module, and a third type of solar cell module. When the plurality of solar cell modules includes the first type of solar cell module, the third length of each of the plurality of solar cell cells in the first type of solar cell module is the first standard length. When the plurality of solar cell modules includes the second type of solar cell module, the third length of each of the plurality of solar cell cells in the second type of solar cell module is the second standard length. When the plurality of solar cell modules includes the third type of solar cell module, the third length of each of the plurality of solar cell cells in the third type of solar cell module is the third standard length. The plurality of solar cell modules includes a first number of solar cell modules and a remaining second number of solar cell modules that is less than the first number. The first output of each of the first number of solar cell modules is smaller than the second output of each of the second number of solar cell modules. Each of the first number of solar cell modules is one type of solar cell module selected from the first type of solar cell module, the second type of solar cell module, and the third type of solar cell module. Each of the second number of solar cell modules is a type of solar cell module different from the one type of solar cell module selected from the first type of solar cell module, the second type of solar cell module, and the third type of solar cell module.

[0011] A first aspect of a solar cell module manufacturing method is a method for manufacturing a solar cell module including a power generating body, the method comprising a first step, a second step, and a third step. The power generating body includes a flat or sheet-shaped, light-transmitting first protective member, a flat or sheet-shaped second protective member, a solar cell unit, and a sealing material. The first protective member has a first surface and a second surface opposite the first surface. The second protective member has a third surface facing the second surface and a fourth surface opposite the third surface. The solar cell unit includes a plurality of solar cells arranged in a matrix along the second surface in a gap between the first protective member and the second protective member. The sealing material is positioned in the gap to seal the solar cell unit. When the first surface is viewed in plan, the power generating body has a rectangular shape with a first long side and a second long side opposing each other in a first direction and a first short side and a second short side opposing each other in a second direction. The first long side and the second long side are each located along the second direction. When the first surface is viewed in a plan view, the power generating element has a first length along the second direction. The first short side and the second short side are each located along the first direction. When the first surface is viewed in a plan view, the power generating element has a second length along the first direction. When the plurality of solar cell cells are viewed in a plan view from the first surface side, each of the plurality of solar cell cells has a rectangular shape having a third long side and a fourth long side and a third short side and a fourth short side. When the plurality of solar cell cells are viewed in a plan view from the first surface side, each of the plurality of solar cell cells has a third length in a direction along each of the third long side and the fourth long side, and a fourth length in a direction along each of the third short side and the fourth short side. The solar cell section includes a plurality of solar cell strings, a plurality of first wiring members, and a plurality of second wiring members.Each of the plurality of solar cell strings includes two or more solar cells arranged in a third direction along the third short side and the fourth short side of the plurality of solar cells, and a plurality of third wiring members electrically connecting each two adjacent solar cells among the two or more solar cells, thereby electrically connecting the two or more solar cells in series. Each of the plurality of first wiring members electrically connects two adjacent solar cell strings among the plurality of solar cell strings. The plurality of second wiring members includes a first second wiring member electrically connected to a solar cell string located at an end of the plurality of solar cell strings in the fourth direction in which the plurality of solar cell strings are arranged, and a second second wiring member electrically connected to a solar cell string located at an end of the plurality of solar cell strings in the direction opposite to the fourth direction. When the plurality of solar cell strings are viewed in plan from the first surface side, in each of the plurality of solar cell strings, each of the plurality of third wiring members is located along the third direction, and the distance in the third direction between each two adjacent solar cells among the two or more solar cells is a first distance. When the first surface is viewed in a plan view, the distance between the first long side and the solar cell unit in the first direction is a first distance, the distance between the solar cell unit and the second long side in the first direction is a second distance, the distance between the first short side and the solar cell unit in the second direction is a third distance, and the distance between the solar cell unit and the second short side in the second direction is a fourth distance. In the first step, the first length and the second length are set. In the second step, one type of solar cell from a plurality of types of solar cell including a first type of solar cell, a second type of solar cell, and a third type of solar cell is prepared as each of the plurality of solar cells. In the third step, the power generator is fabricated using the first protective member and the second protective member corresponding to the first length and the second length set in the first step and the plurality of solar cells prepared in the second step.In the first step, even if any one type of solar cell among the multiple types of solar cells is used for each of the multiple solar cells, when the multiple solar cells are arranged in a first arrangement in the state of the power generating body, in which the third long side and the fourth long side of each of the multiple solar cells are aligned along the second direction and the third short side and the fourth short side of each of the multiple solar cells are aligned along the first direction, the first length and the second length are set to satisfy a first condition that the sum of the first distance and the second distance is less than half the fourth length, and a second condition that the sum of the third distance and the fourth distance is less than half the third length. In the third step, when the multiple solar cells are arranged in the first arrangement in the state of the power generating body, the power generating body is fabricated in a form that satisfies the first condition and the second condition. The first type of solar cell has a rectangular first light-receiving surface. The second type of solar cell has a rectangular second light-receiving surface. The third type solar cell has a rectangular third light-receiving surface. When the first light-receiving surface is viewed in a plan view, the first type solar cell has thirdA long sides and fourthA long sides and thirdA short sides and a thirdA length that is a first standard length in directions along each of the thirdA long sides and the fourthA short sides. When the second light-receiving surface is viewed in a plan view, the second type solar cell has thirdB long sides and fourthB long sides and thirdB short sides and a thirdB length that is a second standard length different from the first standard length in directions along each of the thirdB long sides and the fourthB long sides. When the third light receiving surface is viewed in a plane, the third type solar cell has a third C long side and a fourth C long side, and a third C short side and a fourth C short side, and has a third C length, which is a third standard length different from the first standard length and the second standard length in the direction along each of the third C long side and the fourth C long side.

[0012] A second aspect of the method for manufacturing a solar cell module is a method for manufacturing a solar cell module including a power generating body, the method comprising a first step, a second step, and a third step. The power generating body includes a first protective member having a flat or sheet-like translucency, a second protective member having a flat or sheet-like translucency, a solar cell unit, and a sealing material. The first protective member has a first surface and a second surface opposite the first surface. The second protective member has a third surface facing the second surface and a fourth surface opposite the third surface. The solar cell unit includes a plurality of solar cells arranged in a matrix along the second surface in a gap between the first protective member and the second protective member. The sealing material is positioned in the gap to seal the solar cell unit. When the first surface is viewed from above, the power generating body has a rectangular shape having a first long side and a second long side opposing each other in a first direction and a first short side and a second short side opposing each other in a second direction. The first long side and the second long side are each located along the second direction. When the first surface is viewed in a plan view, the power generating element has a first length along the second direction. The first short side and the second short side are each located along the first direction. When the first surface is viewed in a plan view, the power generating element has a second length along the first direction. When the plurality of solar cell cells are viewed in a plan view from the first surface side, each of the plurality of solar cell cells has a rectangular shape having a third long side and a fourth long side and a third short side and a fourth short side. When the plurality of solar cell cells are viewed in a plan view from the first surface side, each of the plurality of solar cell cells has a third length in a direction along each of the third long side and the fourth long side, and a fourth length in a direction along each of the third short side and the fourth short side. The solar cell section includes a plurality of solar cell strings, a plurality of first wiring members, and a plurality of second wiring members.Each of the plurality of solar cell strings includes two or more solar cells arranged in a third direction along the third short side and the fourth short side of the plurality of solar cells, and a plurality of third wiring members electrically connecting each two adjacent solar cells among the two or more solar cells, thereby electrically connecting the two or more solar cells in series. Each of the plurality of first wiring members electrically connects two adjacent solar cell strings among the plurality of solar cell strings. The plurality of second wiring members includes a first second wiring member electrically connected to a solar cell string located at an end of the plurality of solar cell strings in the fourth direction in which the plurality of solar cell strings are arranged, and a second second wiring member electrically connected to a solar cell string located at an end of the plurality of solar cell strings in the direction opposite to the fourth direction. When the plurality of solar cell strings are viewed in plan from the first surface side, in each of the plurality of solar cell strings, each of the plurality of third wiring members is located along the third direction, and the distance in the third direction between each two adjacent solar cells among the two or more solar cells is a first distance. When the first surface is viewed in a plan view, the distance between the first long side and the solar cell unit in the first direction is a first distance, the distance between the solar cell unit and the second long side in the first direction is a second distance, the distance between the first short side and the solar cell unit in the second direction is a third distance, and the distance between the solar cell unit and the second short side in the second direction is a fourth distance. In the first step, the first length and the second length are set. In the second step, one type of solar cell from a plurality of types of solar cell including a first type of solar cell, a second type of solar cell, and a third type of solar cell is prepared as each of the plurality of solar cells. In the third step, the power generator is fabricated using the first protective member and the second protective member corresponding to the first length and the second length set in the first step and the plurality of solar cells prepared in the second step.In the first step, even if any one type of solar cell among the multiple types of solar cells is used for each of the multiple solar cells, when the multiple solar cells are arranged in a second arrangement in the power generating body in which the third long side and the fourth long side of each of the multiple solar cells are aligned along the first direction and the third short side and the fourth short side of each of the multiple solar cells are aligned along the second direction, the first length and the second length are set to satisfy a third condition that the sum of the first distance and the second distance is less than half the third length and a fourth condition that the sum of the third distance and the fourth distance is less than half the fourth length. In the third step, when the multiple solar cells are arranged in the second arrangement in the power generating body, the power generating body is fabricated in a form that satisfies the third and fourth conditions. The first type of solar cell has a rectangular first light-receiving surface. The second type of solar cell has a rectangular second light-receiving surface. The third type solar cell has a rectangular third light-receiving surface. When the first light-receiving surface is viewed in a plan view, the first type solar cell has thirdA long sides and fourthA long sides and thirdA short sides and a thirdA length that is a first standard length in directions along each of the thirdA long sides and the fourthA short sides. When the second light-receiving surface is viewed in a plan view, the second type solar cell has thirdB long sides and fourthB long sides and thirdB short sides and a thirdB length that is a second standard length different from the first standard length in directions along each of the thirdB long sides and the fourthB long sides. When the third light receiving surface is viewed in a plane, the third type solar cell has a third C long side and a fourth C long side, and a third C short side and a fourth C short side, and has a third C length, which is a third standard length different from the first standard length and the second standard length in the direction along each of the third C long side and the fourth C long side.

[0013] A fourth aspect of the solar cell module includes a power generating body. The power generating body includes a first protective member having a flat or sheet-like translucency, a second protective member having a flat or sheet-like translucency, a solar cell unit, and a sealing material. The first protective member has a first surface and a second surface opposite the first surface. The second protective member has a third surface facing the second surface and a fourth surface opposite the third surface. The solar cell unit includes a plurality of solar cells arranged in a matrix along the second surface in the gap between the first protective member and the second protective member. The sealing material is positioned in the gap to seal the solar cell unit. When the first surface is viewed from above, the power generating body has a rectangular shape having first and second long sides that face each other in a first direction and first and second short sides that face each other in a second direction. The first long side and the second long side each face along the second direction. When the first surface is viewed in a plan view, the power generating element has a first length along the second direction. The first short side and the second short side are each positioned along the first direction. When the first surface is viewed in a plan view, the power generating element has a second length along the first direction. When the plurality of solar cells are viewed in a plan view from the first surface side, each of the plurality of solar cells has a rectangular shape having a third long side and a fourth long side and a third short side and a fourth short side. When the plurality of solar cells are viewed in a plan view from the first surface side, each of the plurality of solar cells has a third length in a direction along each of the third long side and the fourth long side, and a fourth length in a direction along each of the third short side and the fourth short side. Each of the plurality of solar cells is composed of any one type of solar cell selected from a plurality of types of solar cells including a first type of solar cell, a second type of solar cell, and a third type of solar cell. The solar cell section includes a plurality of solar cell strings, a plurality of first wiring members, and a plurality of second wiring members.Each of the plurality of solar cell strings includes two or more solar cells arranged in a third direction along the third short side and the fourth short side of the plurality of solar cells, and a plurality of third wiring members electrically connecting each two adjacent solar cells among the two or more solar cells, thereby electrically connecting the two or more solar cells in series. Each of the plurality of first wiring members electrically connects two adjacent solar cell strings among the plurality of solar cell strings. The plurality of second wiring members includes a first second wiring member electrically connected to a solar cell string located at an end of the plurality of solar cell strings in the fourth direction in which the plurality of solar cell strings are arranged, and a second second wiring member electrically connected to a solar cell string located at an end of the plurality of solar cell strings in the direction opposite to the fourth direction. When the plurality of solar cell strings are viewed in plan from the first surface side, in each of the plurality of solar cell strings, each of the plurality of third wiring members is located along the third direction, and the distance in the third direction between each two adjacent solar cells among the two or more solar cells is a first distance. When the first surface is viewed in a plan view, the distance between the first long side and the solar cell unit in the first direction is a first distance, the distance between the solar cell unit and the second long side in the first direction is a second distance, the distance between the first short side and the solar cell unit in the second direction is a third distance, and the distance between the solar cell unit and the second short side in the second direction is a fourth distance. When the arrangement of the plurality of solar cells is a first arrangement in which the third long side and the fourth long side of each of the plurality of solar cells are aligned along the second direction and the third short side and the fourth short side of each of the plurality of solar cells are aligned along the first direction, a first condition is satisfied that the sum of the first distance and the second distance is less than half the fourth length, and a second condition is satisfied that the sum of the third distance and the fourth distance is less than half the third length. The first type of solar cell has a rectangular first light-receiving surface.The second type solar cell has a rectangular second light-receiving surface. The third type solar cell has a rectangular third light-receiving surface. When the first light-receiving surface is viewed in a plan view, the first type solar cell has thirdA long sides and fourthA long sides and thirdA short sides and a thirdA length that is a first standard length in directions along each of the thirdA long sides and the fourthA short sides. When the second light-receiving surface is viewed in a plan view, the second type solar cell has thirdB long sides and fourthB long sides and thirdB short sides and a thirdB length that is a second standard length different from the first standard length in directions along each of the thirdB long sides and the fourthB long sides. When the third light receiving surface is viewed in a plane, the third type solar cell has a third C long side and a fourth C long side, and a third C short side and a fourth C short side, and has a third C length, which is a third standard length different from the first standard length and the second standard length in the direction along each of the third C long side and the fourth C long side.

[0014] A fifth aspect of the solar cell module includes a power generating body. The power generating body includes a first protective member having a flat or sheet-like translucency, a second protective member having a flat or sheet-like translucency, a solar cell unit, and a sealing material. The first protective member has a first surface and a second surface opposite the first surface. The second protective member has a third surface facing the second surface and a fourth surface opposite the third surface. The solar cell unit includes a plurality of solar cells arranged in a matrix along the second surface in the gap between the first protective member and the second protective member. The sealing material is positioned in the gap to seal the solar cell unit. When the first surface is viewed from above, the power generating body has a rectangular shape having first and second long sides that face each other in a first direction and first and second short sides that face each other in a second direction. The first and second long sides each face along the second direction. When the first surface is viewed in a plan view, the power generating element has a first length along the second direction. The first short side and the second short side are each positioned along the first direction. When the first surface is viewed in a plan view, the power generating element has a second length along the first direction. When the plurality of solar cells are viewed in a plan view from the first surface side, each of the plurality of solar cells has a rectangular shape having a third long side and a fourth long side and a third short side and a fourth short side. When the plurality of solar cells are viewed in a plan view from the first surface side, each of the plurality of solar cells has a third length in a direction along each of the third long side and the fourth long side, and a fourth length in a direction along each of the third short side and the fourth short side. Each of the plurality of solar cells is composed of any one type of solar cell selected from a plurality of types of solar cells including a first type of solar cell, a second type of solar cell, and a third type of solar cell. The solar cell section includes a plurality of solar cell strings, a plurality of first wiring members, and a plurality of second wiring members.Each of the plurality of solar cell strings includes two or more solar cells arranged in a third direction along the third short side and the fourth short side of the plurality of solar cells, and a plurality of third wiring members electrically connecting each two adjacent solar cells among the two or more solar cells, thereby electrically connecting the two or more solar cells in series. Each of the plurality of first wiring members electrically connects two adjacent solar cell strings among the plurality of solar cell strings. The plurality of second wiring members includes a first second wiring member electrically connected to a solar cell string located at an end of the plurality of solar cell strings in the fourth direction in which the plurality of solar cell strings are arranged, and a second second wiring member electrically connected to a solar cell string located at an end of the plurality of solar cell strings in the direction opposite to the fourth direction. When the plurality of solar cell strings are viewed in plan from the first surface side, in each of the plurality of solar cell strings, each of the plurality of third wiring members is located along the third direction, and the distance in the third direction between each two adjacent solar cells among the two or more solar cells is a first distance. When the first surface is viewed in a plan view, a distance between the first long side and the solar cell unit in the first direction is a first distance, a distance between the solar cell unit and the second long side in the first direction is a second distance, a distance between the first short side and the solar cell unit in the second direction is a third distance, and a distance between the solar cell unit and the second short side in the second direction is a fourth distance. The arrangement of the plurality of solar cells is a second arrangement in which the third long side and the fourth long side of each of the plurality of solar cells are positioned along the first direction and the third short side and the fourth short side of each of the plurality of solar cells are positioned along the second direction, and satisfies a third condition that the sum of the first distance and the second distance is less than half the third length and a fourth condition that the sum of the third distance and the fourth distance is less than half the fourth length. The first type of solar cell has a rectangular first light-receiving surface.The second type solar cell has a rectangular second light-receiving surface. The third type solar cell has a rectangular third light-receiving surface. When the first light-receiving surface is viewed in a plan view, the first type solar cell has thirdA long sides and fourthA long sides and thirdA short sides and a thirdA length that is a first standard length in directions along each of the thirdA long sides and the fourthA short sides. When the second light-receiving surface is viewed in a plan view, the second type solar cell has thirdB long sides and fourthB long sides and thirdB short sides and a thirdB length that is a second standard length different from the first standard length in directions along each of the thirdB long sides and the fourthB long sides. When the third light receiving surface is viewed in a plane, the third type solar cell has a third C long side and a fourth C long side, and a third C short side and a fourth C short side, and has a third C length, which is a third standard length different from the first standard length and the second standard length in the direction along each of the third C long side and the fourth C long side.

[0015] A second aspect of the solar cell device includes a plurality of solar cell modules according to the fourth or fifth aspect. The plurality of solar cell modules are electrically connected in series. The plurality of solar cell modules include two or more types of solar cell modules selected from the group consisting of a first type solar cell module, a second type solar cell module, and a third type solar cell module. When the plurality of solar cell modules includes the first type solar cell module, each of the plurality of solar cell cells in the first type solar cell module is the first type solar cell. When the plurality of solar cell modules includes the second type solar cell module, each of the plurality of solar cell cells in the second type solar cell module is the second type solar cell. When the plurality of solar cell modules includes the third type solar cell module, each of the plurality of solar cell cells in the third type solar cell module is the third type solar cell. The plurality of solar cell modules includes a first number of solar cell modules and a remaining second number of solar cell modules that is less than the first number. A first output of each of the first number of solar cell modules is smaller than a second output of each of the second number of solar cell modules. Each of the first number of solar cell modules is one type of solar cell module selected from the first type, the second type, and the third type of solar cell modules, and each of the second number of solar cell modules is a different type of solar cell module selected from the first type, the second type, and the third type of solar cell modules.

[0016] FIG. 1 is a plan view schematically illustrating an example of a general configuration of a solar cell module according to the first embodiment. FIG. 2 is a diagram schematically illustrating an example of a virtual cross section taken along line II-II of the solar cell module shown in FIG. 1. FIG. 3 is a diagram schematically illustrating an example of a configuration of a first power generating body as an example of a power generating body according to the first embodiment, when the first power generating body is viewed from the front side. FIG. 4 is a diagram schematically illustrating an example of a virtual cross section taken along line IV-IV of the power generating body shown in FIG. 3. FIG. 5 is a plan view schematically illustrating an example of a configuration of a first cell surface side of a solar cell constituting the power generating body shown in FIG. 3. FIG. 6 is a plan view schematically illustrating an example of a configuration of a second cell surface side of a solar cell constituting the power generating body shown in FIG. 3. FIG. 7 is a diagram schematically illustrating an example of a virtual cross section taken along line VII-VII of the solar cell shown in FIGS. 5 and 6. FIG. 8 is a diagram schematically illustrating an example of a virtual cross section taken along line VIII-VIII of the solar cell shown in FIGS. 5, 6, 36, and 37. FIG. 9 is a diagram schematically illustrating an example of the configuration of a mother substrate of a solar cell when the third cell surface of the mother substrate is viewed in plan. FIG. 10 is a diagram schematically illustrating an example of the configuration of a mother substrate of a solar cell when the surface opposite to the third cell surface of the mother substrate is viewed in plan. FIG. 11 is a diagram schematically illustrating an example of a virtual cut surface of the mother substrate of the solar cell of FIGS. 9 and 10 taken at position XI-XI. FIG. 12 is a diagram illustrating an example of how a solar cell is fabricated from the mother substrate of the solar cell. FIG. 12 is a diagram schematically illustrating an example of a portion corresponding to the virtual cut surface of the mother substrate of the solar cell of FIGS. 9 and 10 taken at position XI-XI. FIG. 13 is a diagram illustrating an example of how a solar cell is fabricated from the mother substrate of the solar cell. FIG. 13 is a diagram schematically illustrating an example of a portion corresponding to the virtual cut surface of the mother substrate of the solar cell of FIGS. 9 and 10 taken at position XI-XI. FIG. 14 is a diagram illustrating an example of how a solar cell is fabricated from the mother substrate of the solar cell. Fig. 14 shows a schematic diagram of an example of the configuration of the mother substrate after division when the portion corresponding to the third cell surface of the mother substrate of the solar cell is viewed in plan view. Fig. 15 shows an example of how the solar cell is produced from the mother substrate of the solar cell.FIG. 15 schematically illustrates an example of the configuration of a mother substrate after division, when a portion corresponding to the surface of the mother substrate opposite the third cell surface of the solar cell is viewed in plan view. FIG. 16 is an enlarged view of a portion surrounded by a two-dot chain line XVI in FIG. 4 . FIG. 17 is a diagram schematically illustrating an example of the configuration of a first power generating body when viewed in plan view from the back surface side. FIG. 18 is a diagram schematically illustrating an example of the configuration of a second power generating body as an example of a power generating body according to the first embodiment, when viewed in plan view from the front surface side. FIG. 19 is a diagram schematically illustrating an example of the configuration of a second power generating body when viewed in plan view from the back surface side. FIG. 20 is a diagram schematically illustrating an example of the configuration of a third power generating body as an example of a power generating body according to the first embodiment, when viewed in plan view from the front surface side. FIG. 21 is a diagram schematically illustrating an example of the configuration of a third power generating body when viewed in plan view from the back surface side. FIG. 22 is a flowchart illustrating an example of the flow of a method for manufacturing a solar cell module according to the first embodiment. FIG. 23 is a plan view schematically showing an example of the configuration of a solar cell unit fabricated during the fabrication of a first power generating body. FIG. 24 is a plan view schematically showing an example of the configuration of a solar cell unit fabricated during the fabrication of a second power generating body. FIG. 25 is a plan view schematically showing an example of the configuration of a solar cell unit fabricated during the fabrication of a third power generating body. FIG. 26 is a cross-sectional view schematically showing an example of a state during the fabrication of a power generating body of a solar cell module according to the first embodiment. FIG. 27 is a cross-sectional view schematically showing an example of a state during the fabrication of a power generating body of a solar cell module according to the first embodiment. FIG. 28 is a plan view schematically showing a portion of an example of the configuration of a solar cell device according to the first embodiment. FIG. 29 is a cross-sectional view schematically showing an example of a virtual cross section taken at position XXIX-XXIX of the solar cell device of FIG. 28. FIG. 30 is a cross-sectional view schematically showing an example of a virtual cross section taken at position XXX-XXX of the solar cell device of FIG. 28. FIG. 31 is a diagram schematically showing an example of the configuration of a fourth power generating body as an example of a power generating body according to the second embodiment, when viewed from the front side in plan. FIG. 32 is a plan view schematically showing an example of the configuration of the first cell surface side of the solar battery cells that make up the power generating bodies of each of FIGS. 31 and 47. In FIG.FIG. 33 is a diagram schematically illustrating an example of the configuration of a fourth power generating body when viewed from the back surface side. FIG. 34 is a plan view schematically illustrating an example of the configuration of a solar cell unit fabricated during fabrication of the fourth power generating body. FIG. 35 is a diagram schematically illustrating an example of the configuration of a fifth power generating body as an example of a power generating body according to the third embodiment when viewed from the front surface side. FIG. 36 is a plan view schematically illustrating an example of the configuration of a first cell surface side of a solar cell constituting the power generating body of FIG. 35. FIG. 37 is a plan view schematically illustrating an example of the configuration of a second cell surface side of a solar cell constituting the power generating body of FIG. 35. FIG. 38 is a diagram schematically illustrating an example of a virtual cross section of the solar cell at position XXXVIII-XXXVIII in FIGS. 36 and 37. FIG. 39 is a diagram schematically illustrating an example of the configuration of a mother substrate when the first cell surface of the mother substrate of the solar cell is viewed from the front surface. FIG. 40 is a diagram schematically illustrating an example of the configuration of a mother substrate of a solar cell when the surface opposite to the first cell surface of the mother substrate is viewed in plan. FIG. 41 is a diagram schematically illustrating an example of a virtual cut surface at position XXXXI-XXXXI of the mother substrate of the solar cell of FIGS. 39 and 40. FIG. 42 is a diagram illustrating an example of how solar cells are fabricated from the mother substrate of the solar cell. FIG. 42 schematically illustrates an example of a portion corresponding to the virtual cut surface at position XXXXI-XXXXI of the mother substrate of the solar cell of FIGS. 39 and 40. FIG. 43 is a diagram illustrating an example of how solar cells are fabricated from the mother substrate of the solar cell. FIG. 43 is a diagram schematically illustrating an example of a portion corresponding to the virtual cut surface at position XXXXI-XXXXI of the mother substrate of the solar cell of FIGS. 39 and 40. FIG. 44 is a diagram illustrating an example of how solar cells are fabricated from the mother substrate of the solar cell. FIG. 44 is a diagram schematically illustrating an example of the configuration of a mother substrate after division when the portion corresponding to the third cell surface of the mother substrate of the solar cell is viewed in plan. Fig. 45 is a diagram showing an example of how solar cells are produced from a mother substrate of the solar cell, which diagrammatically shows an example of the configuration of the mother substrate after division when the portion corresponding to the surface opposite to the third cell surface of the mother substrate of the solar cell is viewed in plan view.Fig. 46 is a diagram schematically showing an example of the configuration of a solar cell device according to the fourth embodiment. Fig. 47 is a diagram schematically showing an example of the configuration of a sixth power generating body as an example of a power generating body according to the fifth embodiment, when viewed in plan from the front side. Fig. 48 is a diagram schematically showing an example of the configuration of a seventh power generating body as an example of a power generating body according to the fifth embodiment, when viewed in plan from the front side. Fig. 49 is a diagram schematically showing an example of the configuration of an eighth power generating body as an example of a power generating body according to the fifth embodiment, when viewed in plan from the front side.

[0017] The solar cell module is installed, for example, on an installation object using a mount or the like. The installation object is an object on which the solar cell module is to be installed. The installation object may be the roof or exterior wall of a structure such as a house, a building, or a factory.

[0018] The size of solar cells used in solar cell modules has changed over time. It is believed that the conversion efficiency of a solar cell module can be improved by arranging multiple solar cells as closely as possible when the light-receiving surface is viewed in a planar view. Therefore, the size of the solar cell module may vary depending on the size of the solar cell.

[0019] In response to this, a mounting unit that can flexibly accommodate the size of a solar cell module can be considered. For example, a mounting unit including a rail member, a press member, and an engaging member can be considered. The rail member extends in the longitudinal direction and can receive a solar panel on the surface of a backing plate that is continuous in the longitudinal direction. The pressing member can be hooked onto the edge of the solar cell module and press the solar panel against the rail member. The engaging member is connected to the pressing member with a fastener and can be attached to the rail member by wrapping around from the edge of the backing plate to the back side of the backing plate. When such a mounting unit is used to secure a solar cell module, the engaging member is hooked onto the rail member outside the outline of the solar cell module. The pressing member is hooked onto the frame of the solar cell module. When the distance between the pressing member and the engaging member is reduced by the fastener, the frame of the solar cell module is sandwiched between the surface of the backing plate and the press member. This secures the solar cell module to the mounting unit. Here, the engaging member hooked onto the rail member can be moved to any position relative to the rail member. Therefore, the solar cell module can be fixed in a manner that flexibly corresponds to the size of the solar power generation panel.

[0020] However, when the mounting unit described above is used, at the construction site where the solar cell module is fixed to the mounting unit, the worker moves the engaging member, which is a part of the mounting unit, relative to the rail member, which can cause variations in construction depending on the worker. In other words, at the construction site, the worker fixes the solar cell module to the mounting unit by adjusting the position of a part of the mounting unit, which can cause variations in construction depending on the worker. As a result, construction errors can occur, resulting in insufficient fixation of the solar cell module to the mounting unit.

[0021] Therefore, there is room for improvement in solar cell modules and solar cell devices in terms of reducing installation errors when fixing solar cell modules to installation objects.

[0022] Therefore, the inventors of the present disclosure have created a technology for solar cell modules and solar cell devices that can reduce installation errors when fixing solar cell modules to installation targets.

[0023] Various embodiments and examples will be described below with reference to the drawings. In the drawings, parts having the same or similar configurations and functions are designated by the same reference numerals. Duplicate descriptions will be omitted in the following description. The drawings are schematic. A right-handed XYZ coordinate system is illustrated in Figures 1 to 8, 16 to 21, 26 to 33, 35 to 38, and 47 to 49. This XYZ coordinate system defines directions in the solar cell module 100 and the power generator 10. In this XYZ coordinate system, the +X direction is a direction along each of the first long side 1Ls and the second long side 2Ls of the front surface 10f of the power generator 10, the +Y direction is a direction along each of the first short side 1Ss and the second short side 2Ss of the front surface 10f of the power generator 10, and the +Z direction is a direction perpendicular to both the +X and +Y directions. 9 to 15 , 23 to 25 , 34 , and 39 to 45 are illustrated with a right-handed xyz coordinate system. This xyz coordinate system defines the directions of the solar cell 31 and the solar cell unit 3 at the stage of manufacturing the power generating body 10. In this xyz coordinate system, one direction along the longitudinal direction of the finger portion 311f is the +x direction, one direction along the longitudinal direction of the busbar portion 311b is the +y direction, and the direction perpendicular to both the +x direction and the +y direction is the +z direction. In FIG. 1 , the solar cell unit 3 is omitted from illustration to avoid complication. In each of FIGS. 3 , 18 , 20 , 23 to 25 , 31 , 34 , 35 , and 47 to 49 , the finger portion 311f is omitted from illustration to avoid complication.

[0024] In this disclosure, when expressions indicating relative or absolute positional relationships (e.g., "in one direction," "along one direction," "parallel," "orthogonal," "center," "concentric," "coaxial," etc.) are used, unless otherwise specified, these expressions not only strictly represent the positional relationship but also represent a state of relative displacement in terms of angle or distance within a range in which tolerance or equivalent functionality is obtained. When expressions indicating an equal state (e.g., "identical," "equal," "homogeneous," etc.) are used, these expressions not only represent a state of strict quantitative equality but also represent a state in which there is a difference in which tolerance or equivalent functionality is obtained, unless otherwise specified. When expressions indicating a shape (e.g., "rectangular shape" or "cylindrical shape," etc.) are used, these expressions not only represent a geometrically strict shape but also represent a shape having, for example, any of concaves and convexes and chamfers within a range in which equivalent effects are obtained. When expressions such as "comprise," "include," "include," "include," or "have" are used to describe one component, these expressions are not exclusive expressions that exclude the presence of other components. When the expression "at least one of A, B, and C" is used, this expression includes any of the following cases: A only, B only, C only, any two of A, B, and C, and all of A, B, and C.

[0025] 1. First Embodiment A solar cell module 100 according to a first embodiment will be described with reference to FIGS. 1 to 21. FIG.

[0026] As shown in Figures 1 and 2, the solar cell module 100 includes a power generating element 10. The power generating element 10 may have, for example, a flat plate shape. The power generating element 10 has, for example, a surface 10f onto which light is mainly incident (also referred to as a front surface or a light-receiving surface) and a surface 10b located on the opposite side of the front surface 10f (also referred to as a back surface). For example, the front surface 10f faces the +Z direction. For example, the back surface 10b faces the -Z direction. When the solar cell module 100 is used for power generation outdoors, the +Z direction is set, for example, to face the sun at its zenith point.

[0027] The solar cell module 100 may further include, for example, one or more terminal boxes J1 for extracting the power generated in the power generator 10 to the outside. The one or more terminal boxes J1 are located, for example, on the back surface 10b side of the power generator 10. The solar cell module 100 may further include, for example, a frame FL1 for protecting the outer periphery of the power generator 10. In this case, the frame FL1 is located, for example, along the outer periphery of the power generator 10. The outer periphery of the power generator 10 may be, for example, a portion of the power generator 10 located along the end face connecting the front surface 10f and the back surface 10b. Here, for example, a sealant with low moisture permeability, such as a butyl-based resin, may be further filled between the outer periphery of the power generator 10 and the frame FL1.

[0028] <1-1. Power Generator> As shown in FIGS. 3 and 4, the power generator 10 has a first protective member 1, a second protective member 2, a solar cell section 3, and a sealing material 4.

[0029] <1-1-1. First Protective Member> The first protective member 1 is, for example, a member for protecting the solar cell unit 3 from the front surface 10f. The first protective member 1, for example, constitutes the front surface 10f of the power generating body 10. The first protective member 1 is translucent. Specifically, the first protective member 1 is translucent for light of a specific wavelength range. The specific wavelength range includes, for example, wavelengths of light that can be photoelectrically converted by the solar cell unit 3. If the specific wavelength range includes wavelengths of sunlight with high irradiation intensity, the photoelectric conversion efficiency of the solar cell module 100 can be improved. As shown in FIG. 4 , the first protective member 1 has a first surface 1f and a second surface 1s. The first surface 1f, for example, constitutes the front surface 10f of the power generating body 10. The first surface 1f is the surface of the first protective member 1 opposite the solar cell unit 3. The second surface 1s is the surface of the first protective member 1 opposite the first surface 1f. The second surface 1s faces the solar cell unit 3. A flat or sheet-like member is used for the first protective member 1. Here, examples of materials used for the flat member include glass or resins such as polycarbonate or acrylic. Examples of materials used for the sheet-like member include weather-resistant fluorine-based resins. Examples of weather-resistant fluorine-based resins include fluorinated ethylene propylene copolymer (FEP), ethylene tetrafluoroethylene copolymer (ETFE), and / or ethylene chlorotrifluoroethylene copolymer (ECTFE).

[0030] Each of the first surface 1f and the second surface 1s has a rectangular shape. More specifically, when the first surface 1f is viewed in a plan view, the power generation body 10 has a rectangular shape with two long sides facing each other in the +Y direction as a first direction and two short sides facing each other in the +X direction as a second direction. The two long sides may be a first long side 1Ls and a second long side 2Ls. The two short sides may be a first short side 1Ss and a second short side 2Ss. When the first surface 1f is viewed in a plan view, this may mean that the first surface 1f is viewed in a direction along the normal to the first surface 1f. In other words, when the first surface 1f is viewed in a plan view, this may mean that the first surface 1f is viewed in a plan view toward the −Z direction.

[0031] The first long side 1Ls and the second long side 2Ls are each located along the +X direction as the second direction. In other words, the first long side 1Ls and the second long side 2Ls each extend along the +X direction as the second direction. When the first surface 1f is viewed in plan, the power generation body 10 has a predetermined length L1 (also referred to as a first length) along the +X direction as the second direction. For example, as shown in FIGS. 1 and 3, the first long side 1Ls and the second long side 2Ls may each have a first length L1 along the +X direction as the second direction. The length of the first long side 1Ls and the length of the second long side 2Ls may be the same, for example. Here, the term "same length" may refer to, for example, when the first protective member 1 and the power generating body 10 are manufactured such that the lengths of the first long side 1Ls and the second long side 2Ls are the same, a length that allows for tolerances that may arise due to the precision in manufacturing the first protective member 1 and the power generating body 10. In other words, the length of the first long side 1Ls and the length of the second long side 2Ls may be substantially the same. The first length L1 may be, for example, a predetermined length that allows for tolerances that may arise due to the precision in manufacturing the first protective member 1 and the power generating body 10 when the first protective member 1 and the power generating body 10 are manufactured.

[0032] The first short side 1Ss and the second short side 2Ss are each located along the +Y direction as a first direction. In other words, the first short side 1Ss and the second short side 2Ss each extend along the +Y direction as a first direction. When the first surface 1f is viewed in plan, the power generator 10 has a predetermined length L2 (also referred to as a second length) along the +Y direction as a first direction. For example, as shown in FIGS. 1 and 3, the first short side 1Ss and the second short side 2Ss may each have a second length L2 along the +Y direction as a first direction. The length of the first short side 1Ss and the length of the second short side 2Ss may be the same, for example. Here, the term "same length" may refer to, for example, when the first protective member 1 and the power generating body 10 are manufactured such that the lengths of the first short side 1Ss and the second short side 2Ss are the same, a length that allows for tolerances that may arise due to the precision in manufacturing the first protective member 1 and the power generating body 10. In other words, the length of the first short side 1Ss and the length of the second short side 2Ss may be substantially the same. The second length L2 may be, for example, a predetermined length that allows for tolerances that may arise due to the precision in manufacturing the first protective member 1 and the power generating body 10 when the first protective member 1 and the power generating body 10 are manufactured.

[0033] <1-1-2. Second Protective Member> The second protective member 2 is, for example, a member for protecting the solar cell unit 3 from the back surface 10b side. The second protective member 2, for example, constitutes the back surface 10b of the power generation body 10. The second protective member 2 may be, for example, translucent, or may not be translucent. As shown in FIG. 4 , the second protective member 2 has a third surface 2f and a fourth surface 2s. The third surface 2f faces the second surface 1s. From another perspective, the third surface 2f faces the solar cell unit 3. The fourth surface 2s is the surface of the second protective member 2 on the opposite side from the third surface 2f. From another perspective, the fourth surface 2s is the surface of the second protective member 2 on the opposite side from the solar cell unit 3. The fourth surface 2s, for example, constitutes the back surface 10b of the power generation body 10. The third surface 2f and the fourth surface 2s each have a rectangular shape. The second protective member 2 may be, for example, a sheet-like or flat-plate-like member. The sheet-like member may be, for example, a back sheet that forms the back surface 10b. The back sheet may be made of, for example, a resin. The flat-plate-like member may be, for example, a glass plate or a polycarbonate plate.

[0034] <1-1-3. Solar Cell Unit> The solar cell unit 3 is located in the gap between the first protective member 1 and the second protective member 2. In other words, the solar cell unit 3 faces the first protective member 1 and the second protective member 2 in the Z direction. As shown in Figures 3 and 4, the solar cell unit 3 includes a plurality of solar cell cells 31. The solar cell unit 3 also includes a plurality of solar cell strings 30, a plurality of first wiring members 33, and a plurality of second wiring members 34.

[0035] <<Multiple Solar Cells>> Each of the multiple solar cells 31 can convert light energy into electrical energy. Each of the multiple solar cells 31 has, for example, a plate shape. The multiple solar cells 31 are located between the second surface 1 s of the first protective member 1 and the third surface 2 f of the second protective member 2. From another perspective, the multiple solar cells 31 are located facing the second surface 1 s of the first protective member 1. Furthermore, the multiple solar cells 31 are lined up along the second surface 1 s of the first protective member 1. More specifically, the multiple solar cells 31 are located in a matrix along the second surface 1 s of the first protective member 1. As shown in FIGS. 3 and 4 , the multiple solar cells 31 are lined up two-dimensionally along a virtual XY plane.

[0036] <<<Configuration of Solar Cell>>> As shown in FIGS. 3 to 8 , the solar cell 31 has, for example, a first cell surface F1, a second cell surface F2, and multiple cell side surfaces F3. The second cell surface F2 is the surface of the solar cell 31 opposite the first cell surface F1. Each of the multiple cell side surfaces F3 connects the first cell surface F1 and the second cell surface F2. In the examples of FIGS. 3 to 8 , the first cell surface F1 faces the +Z direction, and the second cell surface F2 faces the −Z direction. The multiple cell side surfaces F3 include a cell side surface F3 facing the −Y direction, a cell side surface F3 facing the +Y direction, a cell side surface F3 facing the −X direction, and a cell side surface F3 facing the +X direction. For example, the first cell surface F1 may be the surface onto which light is primarily incident (also referred to as the light-receiving surface or the front surface). For example, the second cell surface F2 may be a back surface of the solar cell 31 opposite to the light-receiving surface. Each of the first cell surface F1 and the second cell surface F2 has, for example, a rectangular shape. Here, for example, some of the four corners of each of the first cell surface F1 and the second cell surface F2 may be arc-shaped or may have a shape with C-chamfered corners. In the solar cell module 100, for example, in each of the multiple solar cell cells 31, the first cell surface F1 faces the second surface 1s of the first protective member 1, and the second cell surface F2 faces the third surface 2f of the second protective member 2.

[0037] As shown in Fig. 5 , when the plurality of solar cells 31 are viewed in plan from the first surface 1f side, each of the plurality of solar cells 31 has a rectangular shape having a third long side (also referred to as a first cell long side) 3Ls, a fourth long side (also referred to as a second cell long side) 4Ls, and a third short side (also referred to as a first cell short side) 3Ss, and a fourth short side (also referred to as a second cell short side) 4Ss. In other words, in each of the plurality of solar cells 31, the first cell surface F1 may have the third long side 3Ls and the fourth long side 4Ls as two cell long sides, and the third short side 3Ss and the fourth short side 4Ss as two cell short sides. When the plurality of solar cells 31 are viewed in plan from the first surface 1f side, this may mean that the plurality of solar cells 31 are viewed in plan in a direction normal to the first surface 1f. In other words, when the plurality of solar cells 31 are viewed in plan from the first surface 1f side, this may mean that the plurality of solar cells 31 are viewed in plan in the -Z direction.

[0038] In the first embodiment, for example, when the plurality of solar cells 31 are viewed in plan from the first surface 1f side, each of the plurality of solar cells 31 has a rectangular shape having two long sides (also referred to as cell long sides) that face each other in the +Y direction as a first direction and two short sides (also referred to as cell short sides) that face each other in the +X direction as a second direction. The two long sides (cell long sides) may be a third long side (first cell long side) 3Ls and a fourth long side (second cell long side) 2Ls. The two short sides (cell short sides) may be a third short side (first cell short side) 3Ss and a fourth short side (second cell short side) 4Ss.

[0039] 5 , when the plurality of solar cells 31 are viewed in plan from the first surface 1f side, each of the plurality of solar cells 31 has a predetermined length L3 (also referred to as a third length) in the direction along each of the third long side 3Ls and the fourth long side 4Ls, and a predetermined length L4 (also referred to as a fourth length) in the direction along each of the third short side 3Ss and the fourth short side 4Ss. In the first embodiment, for example, each of the plurality of solar cells 31 has the third length L3 along the +X direction as the second direction, and the fourth length L4 along the +Y direction as the first direction.

[0040] For example, the length of the third short side 3Ss and the length of the fourth short side 4Ss may be the same. Here, the "same length" may refer to, for example, when the solar cell 31 is manufactured so that the lengths of the third short side 3Ss and the fourth short side 4Ss are the same, an equal length that allows for tolerances that may arise due to the precision in manufacturing the solar cell 31. In other words, the length of the third short side 3Ss and the length of the fourth short side 4Ss may be substantially the same.

[0041] In the first embodiment, the value obtained by dividing the fourth length L4 by the third length L3 may be, for example, 1 / 2 or approximately 1 / 2.

[0042] For example, each of the third length L3 and the fourth length L4 may be a predetermined length that allows for tolerances that may occur due to the precision in manufacturing the solar cell 31, for example.

[0043] Each of the plurality of solar cells 31 includes, for example, a semiconductor substrate 310. Each of the plurality of solar cells 31 includes, for example, a first electrode 311 and a second electrode 312.

[0044] The semiconductor substrate 310 has a first substrate surface 310a, a second substrate surface 310b, and a plurality of substrate side surfaces 310c. The first substrate surface 310a is located on the first protective member 1 side of the semiconductor substrate 310. In other words, the first substrate surface 310a is located on the first cell surface F1 side of the semiconductor substrate 310. The second substrate surface 310b is located on the opposite side of the semiconductor substrate 310 from the first substrate surface 310a. In other words, the second substrate surface 310b is located on the second protective member 2 side of the semiconductor substrate 310. In further words, the second substrate surface 310b is located on the second cell surface F2 side of the semiconductor substrate 310. Each of the plurality of substrate side surfaces 310c is a surface (also referred to as a side surface) connecting the first substrate surface 310a and the second substrate surface 310b in the semiconductor substrate 310. The semiconductor substrate 310 may have, for example, a plate-like shape. For example, a crystalline silicon substrate or the like is used as the semiconductor substrate 310. The crystalline silicon may be single-crystal silicon or polycrystalline silicon. Here, it is assumed that a crystalline silicon substrate is used as the semiconductor substrate 310. In this case, as shown in FIGS. 7 and 8 , the semiconductor substrate 310 has a region 310f of a semiconductor having a first conductivity type (also referred to as a first-type region) and a region 310s of a semiconductor having a second conductivity type opposite to the first conductivity type (also referred to as a second-type region). The first-type region 310f is located, for example, on the second substrate surface 310b side of the semiconductor substrate 310. The second-type region 310s is located, for example, in a surface layer portion of the semiconductor substrate 310 on the first substrate surface 310a side. The surface layer portion may be a portion of the semiconductor substrate 310 that extends along the first substrate surface 310a and forms the first substrate surface 310a. Here, for example, when the first conductivity type is p-type, the second conductivity type is n-type. For example, when the first conductivity type is n-type, the second conductivity type is p-type. As a result, the semiconductor substrate 310 has, for example, a pn junction located at the interface between the first-type region 310f and the second-type region 310s.

[0045] Each of the first substrate surface 310a and the second substrate surface 310b has, for example, a rectangular shape. Here, for example, some of the four corners of each of the first substrate surface 310a and the second substrate surface 310b may be arc-shaped or may have a shape with C-chamfered corners. The thickness of the semiconductor substrate 310 may be set to, for example, approximately 50 micrometers (μm) to 250 μm.

[0046] The first electrode 311 is located, for example, on the first substrate surface 310a of the semiconductor substrate 310. In other words, the first electrode 311 is located on the first cell surface F1 side of the solar cell 31. Here, the length (also referred to as thickness) of the first electrode 311 in the +Z direction may be set to, for example, approximately 0.5 μm to 50 μm. The first electrode 311 includes, for example, a busbar portion 311b as a first output portion and a plurality of finger portions 311f as a plurality of first current collecting portions. More specifically, for example, the first electrode 311 includes a plurality of busbar portions 311b and a plurality of finger portions 311f.

[0047] In the first embodiment, each of the busbar portions 311b is located along the +Y direction, which is a first direction along the first substrate surface 310a. In other words, each of the busbar portions 311b has a longitudinal direction along the +Y direction, which is the first direction. From another perspective, each of the busbar portions 311b has an elongated shape along the +Y direction, which is the first direction. For example, the busbar portions 311b are lined up in the +X direction, which is the second direction. Each of the busbar portions 311b has, for example, the same structure. When the power generator 10 is manufactured using multiple solar cells 31, third wiring members 32 are joined to the busbar portions 311b to electrically connect two adjacent solar cells 31. The busbar portions 311b may have pads to which the third wiring members 32 are joined, for example, at regular intervals along the longitudinal direction of the busbar portions 311b.

[0048] In the first embodiment, the multiple finger portions 311f are aligned in the +Y direction as a first direction. Each of the multiple finger portions 311f is a linear portion thinner than the busbar portion 311b. Each of the multiple finger portions 311f is connected to the multiple busbar portions 311b while intersecting with the multiple busbar portions 311b. In other words, each of the multiple finger portions 311f is connected to the busbar portions 311b while intersecting with the busbar portions 311b. Each of the multiple finger portions 311f is located, for example, along the +X direction as a second direction along the first substrate surface 310a. In other words, each of the multiple finger portions 311f has a longitudinal direction along the +X direction as the second direction, for example. From another perspective, each of the multiple finger portions 311f has an elongated linear shape along the +X direction as the second direction.

[0049] In the examples of FIGS. 5 and 8 , nine busbar portions 311b as the plurality of substantially parallel busbar portions 311b and many finger portions 311f as the plurality of substantially parallel finger portions 311f are positioned substantially perpendicular to each other. In other words, the first electrode 311 may be a grid-shaped electrode. Here, the number of busbar portions 311b in the first electrode 311 is not limited to nine. The number of busbar portions 311b in the first electrode 311 may be any number between 5 and 20, for example. The number of finger portions 311f may be, for example, approximately 140 to 200. In this case, the spacing between the plurality of finger portions 311f may be, for example, approximately 0.7 mm to 1.2 mm.

[0050] 5, the first electrode 311 may have, for example, an auxiliary electrode 311a located along the outer edge in the −X direction on the first substrate surface 310a, and an auxiliary electrode 311a located along the outer edge in the +X direction. Each of the two auxiliary electrodes 311a has, for example, a large number of approximately parallel finger portions 311f connected to each other.

[0051] For example, if the main component of the material of the first electrode 311 is silver, the first electrode 311 can be formed by applying a silver paste to a desired shape using a screen printing method or the like and then firing the silver paste. In this specification, the term "main component" refers to the component that is contained in the substance at the highest ratio (also referred to as the content rate). For example, a metal paste containing a metal powder containing silver as the main component, an organic vehicle, and glass frit is used as the silver paste. The busbar portions 311b, finger portions 311f, and two auxiliary electrodes 311a of the first electrode 311 may be formed in separate processes or in the same process.

[0052] As shown in FIGS. 5 , 7 , and 8 , the solar cell 31 may include an insulating layer 314 located on the second-type region 310 s of the semiconductor substrate 310 in a region where the first electrode 311 is not located. The insulating layer 314 may include an anti-reflection film or a passivation film. The passivation film may be located between the second-type region 310 s of the semiconductor substrate 310 and the anti-reflection film. The anti-reflection film may be an insulating film made of, for example, silicon nitride. The passivation film may be a thin film made of, for example, an oxide such as aluminum oxide or a nitride. The passivation film may be formed by, for example, atomic layer deposition (ALD). The anti-reflection film may be formed by, for example, plasma-enhanced chemical vapor deposition (PECVD) or sputtering.

[0053] The multiple substrate side surfaces 310c include a first substrate side surface 310c1 and a second substrate side surface 310c2. The second substrate side surface 310c2 connects the first substrate surface 310a and the second substrate surface 310b on the side of the semiconductor substrate 310 opposite the first substrate side surface 310c1. For example, as shown in FIGS. 5 and 7, the first substrate side surface 310c1 and the second substrate side surface 310c2 are located along the third long side 3Ls and the fourth long side 4Ls, respectively. In other words, the longitudinal directions of the first substrate side surface 310c1 and the second substrate side surface 310c2 may be along the third long side 3Ls and the fourth long side 4Ls, respectively.

[0054] In the first embodiment, for example, as shown in FIG. 7 , when the first substrate side surface 310c1 faces the +Y direction as a first direction, the second substrate side surface 310c2 faces the −Y direction as a direction opposite to the first direction. In other words, when the first substrate side surface 310c1 is located along the fourth long side 4Ls, the second substrate side surface 310c2 is located along the third long side 3Ls. Alternatively, for example, the first substrate side surface 310c1 may face the −Y direction as a direction opposite to the first direction, and the second substrate side surface 310c2 may face the +Y direction as a first direction. In other words, when the first substrate side surface 310c1 is located along the third long side 3Ls, the second substrate side surface 310c2 may be located along the fourth long side 4Ls.

[0055] 7 and 8, the insulating layer 314 may cover the remaining substrate side surfaces 310c of the plurality of substrate side surfaces 310c except for the second substrate side surface 310c2. In other words, the second substrate side surface 310c2 of the plurality of substrate side surfaces 310c may not be covered with the insulating layer 314. In other words, each of the plurality of solar cell units 31 may have the insulating layer 314 covering the first substrate side surface 310c1. In each of the plurality of solar cell units 31, the second substrate side surface 310c2 may be exposed to the outside of the solar cell unit 31. The second substrate side surface 310c2 may be a newly formed surface formed by dividing a mother substrate (also referred to as a solar cell assembly) 31P of the solar cell into two, as will be described later.

[0056] Here, by dividing the mother substrate 31P of the solar cell into two, it is possible to prepare a plurality of solar cells 31 each having a rectangular first cell surface F1 and a rectangular second cell surface F2 that can be applied to the power generation body 10. As a result, it is possible to efficiently prepare a plurality of solar cells 31.

[0057] Here, the second substrate side surface 310c2 of the semiconductor substrate 310 is a portion (also referred to as an exposed portion) exposed to the outside of the solar cell 31. More specifically, the second substrate side surface 310c2 of the semiconductor substrate 310 is a state in which a semiconductor portion (e.g., silicon) is exposed to the outside of the solar cell 31. Note that the state in which a semiconductor portion (e.g., silicon) is exposed to the outside of the solar cell 31 refers to a state in which the semiconductor substrate 310 is intentionally exposed to the outside of the solar cell 31 without an insulating layer or the like being intentionally disposed. Therefore, for example, a state in which a natural oxide film is formed on the second substrate side surface 310c2 of the semiconductor substrate 310 is included in the state in which the second substrate side surface 310c2 of the semiconductor substrate 310 is exposed to the outside of the solar cell 31. Furthermore, for example, a state in which a part of the second-type region 310s is formed on the second substrate side surface 310c2 of the semiconductor substrate 310 is also included in the state in which the second substrate side surface 310c2 of the semiconductor substrate 310 is exposed to the outside of the solar cell 31.

[0058] The second electrode 312 is located, for example, on the second cell surface F2 side of the semiconductor substrate 310.

[0059] The second electrode 312 includes, for example, a second output portion 312 b and a second current collector 312 c. More specifically, for example, the second electrode 312 includes a plurality of second output portions 312 b and second current collectors 312 c.

[0060] In the first embodiment, each of the multiple second output portions 312b is located along the +Y direction as a first direction. The multiple second output portions 312b are lined up, for example, in the +X direction as a second direction. Each of the multiple second output portions 312b includes, for example, multiple electrode portions lined up in a row. In the example of FIG. 6 , each of the multiple second output portions 312b includes, for example, three electrode portions lined up in a row. Each of the multiple second output portions 312b may have, for example, a linear shape. When the power generation body 10 is manufactured using multiple solar cell cells 31, a third wiring member 32 is joined to the second output portion 312b to electrically connect two adjacent solar cell cells 31.

[0061] The second current collector 312c is located on the second cell surface F2 side of the semiconductor substrate 310. The second current collector 312c is located on substantially the entire area on the second cell surface F2 side of the semiconductor substrate 310 where the second output portion 312b is not located, except for the area where the second output portion 312b and the second current collector 312c are connected to each other by overlapping each other. The second current collector 312c may be located in a lattice pattern, for example.

[0062] Here, for example, as shown in Figures 7 and 8, the first-type region 310f has a region 310t (also called a high-concentration region or a BSF (Back Surface Field) region) in which the concentration of the dopant element of the first conductivity type is higher than in other regions of the first-type region 310f, for example, in the surface layer portion in contact with the second current collecting portion 312c.

[0063] For example, if the main component of the material of second output portion 312b is silver, second output portion 312b can be formed by applying silver paste to a desired shape by screen printing or the like and then firing the silver paste. For example, if the main component of the material of second current collector 312c is aluminum, second current collector 312c can be formed by applying aluminum paste to a desired shape by screen printing or the like and then firing the aluminum paste. The aluminum paste can be, for example, a metal paste containing a metal powder containing aluminum as a main component, an organic vehicle, and glass frit.

[0064] Here, a passivation film (not shown) may be present between the first-type region 310f of the semiconductor substrate 310 and the second output portion 312b and second current collector 312c. In other words, the solar cell 31 may be a solar cell having a PERC (Passivated Emitter and Rear Cell) structure. The passivation film may be a thin film made of, for example, an oxide such as aluminum oxide or a nitride. In this case, the passivation film may be positioned in a desired pattern between the first-type region 310f and the second output portion 312b and second current collector 312c. Furthermore, a film (also referred to as a protective film) (not shown) for protecting the passivation film may be present between the passivation film and the second current collector 312c. For example, a thin film made of an oxide such as silicon oxide may be used as the protective film. The protective film may be positioned in a desired pattern between the passivation film and the second current collector 312c. For example, the protective film does not have to be present between the passivation film and the second output unit 312b. In this case, the protective film may have a plurality of holes in which the second output unit 312b is located. Alternatively, for example, the protective film may be present between the passivation film and the second output unit 312b. The passivation film and the protective film may have a number of through-holes for bringing a portion of the second current collecting unit 312c into contact with the first-type region 310f.

[0065] <<Example of Method for Forming Solar Cells>> In the first embodiment, a mother substrate 31P of the solar cells (hereinafter abbreviated as mother substrate) can be divided to form a plurality of solar cells 31. Here, a method for forming the solar cells 31 by dividing the mother substrate 31P, which is a large solar cell, will be described with reference to the drawings.

[0066] As shown in Figures 9 to 11, the mother substrate 31P is a large solar cell before being divided into a plurality of solar cell units 31. Therefore, the mother substrate 31P has a configuration including a plurality of solar cell units 31. For example, as shown in Figures 9 to 11, the mother substrate 31P includes a semiconductor substrate 310, an insulating layer 314, a first electrode 311, and a second electrode 312. Therefore, this mother substrate 31P can also be used as a solar cell. In the mother substrate 31P, all side surfaces of the semiconductor substrate 310 are covered with the insulating layer 314.

[0067] First, as shown in FIGS. 9 to 11 , a laser beam is irradiated onto a region along a dividing line 31M1, indicated by a thin two-dot chain line, on a surface (also referred to as a third cell surface) F1P of the mother substrate 31P, which includes regions corresponding to the plurality of first cell surfaces F1. As a result, as shown in FIG. 12 , dividing grooves 31M are formed on the third cell surface F1P side of the mother substrate 31P. In the example shown in FIGS. 9 to 11 , the region along the dividing line 31M1 is a linear region extending in the +x direction. The laser beam used here may be, for example, a laser beam emitted from a YAG (yttrium aluminum garnet) laser. The laser beam conditions are set, for example, as follows: a wavelength of 1.06 μm, an output of 10 watts (W) to 30 W, a beam divergence angle of 1 milliradian (mrad) to 5 mrad, and a scanning speed of 50 millimeters per second (mm / sec) to 300 mm / sec. The depth of the dividing groove 31M is set to, for example, 25 percent (%) or more of the thickness of the semiconductor substrate 310. In the parent substrate 31P, the third cell surface F1P may be the surface onto which light is mainly incident (also referred to as the light-receiving surface or the front surface), similar to the first cell surface F1.

[0068] Next, an external force is applied to the mother substrate 31P while bending the mother substrate 31P along the dividing grooves 31M. This causes the mother substrate 31P to be divided into two. As a result, two solar cell units 31 are formed, as shown in FIGS. 13 to 15 . At the surface (also referred to as the dividing surface) of each of the two solar cell units 31 formed by dividing the mother substrate 31P, the second substrate side surface 310c2 of the semiconductor substrate 310 is exposed to the outside of the solar cell unit 31, as shown in FIG. 13 . Furthermore, of the multiple substrate side surfaces 310c of the semiconductor substrate 310 in each of the two solar cell units 31 formed here, the remaining multiple substrate side surfaces 310c excluding the second substrate side surface 310c2 are covered with an insulating layer 314.

[0069] 5 , in the first embodiment, the third long side 3Ls and the fourth long side 4Ls of each of the plurality of solar cells 31 are positioned along the +X direction as the second direction, and the third short side 3Ss and the fourth short side 4Ss of each of the plurality of solar cells 31 are positioned along the +Y direction as the first direction. In other words, the third long side 3Ls and the fourth long side 4Ls each extend along the +X direction as the second direction, and the third short side 3Ss and the fourth short side 4Ss each extend along the +Y direction as the first direction.

[0070] In the present disclosure, an arrangement of the plurality of solar cells 31 in the state of the power generating body 10 in which the third long side 3Ls and the fourth long side 4Ls of each of the plurality of solar cells 31 are located along the +X direction as the second direction and the third short side 3Ss and the fourth short side 4Ss of each of the plurality of solar cells 31 are located along the +Y direction as the first direction is also referred to as a "first arrangement." In the first embodiment, the arrangement of the plurality of solar cells 31 is the first arrangement. In the power generating body 10, when the arrangement of the plurality of solar cells 31 is the first arrangement, the long side of the first surface 1f and the long side of the first cell surface F1 of each of the plurality of solar cells 31 are located along the +X direction as the second direction, and the short side of the first surface 1f and the short side of the first cell surface F1 of each of the plurality of solar cells 31 are located along the +Y direction as the first direction. In other words, in the power generating body 10, when the arrangement of the plurality of solar cells 31 is the first arrangement, for example, the third long side 3Ls and the fourth long side 4Ls of each of the plurality of solar cells 31 are located along the +X direction as a second direction along the first long side 1Ls and the second long side 2Ls of the first surface 1f. Also, in the power generating body 10, when the arrangement of the plurality of solar cells 31 is the first arrangement, for example, the third short side 3Ss and the fourth short side 4Ss of each of the plurality of solar cells 31 are located along the +Y direction as a first direction along the first short side 1Ss and the second short side 2Ss of the first surface 1f.

[0071] <<Multiple Solar Cell Strings>> The multiple solar cell strings 30 are arranged side by side in, for example, the +X direction as the second direction.

[0072] Each of the multiple solar cell strings 30 includes, for example, two or more solar cells 31 and multiple third wiring members 32 .

[0073] In each of the plurality of photovoltaic strings 30, the two or more photovoltaic cells 31 are some of the plurality of photovoltaic cells 31 included in the solar cell unit 3. In each of the plurality of photovoltaic strings 30, the two or more photovoltaic cells 31 are arranged in a direction (also referred to as a third direction) along each of the third short side 3Ss and the fourth short side 4Ss. In the first embodiment, the third direction is, for example, the +Y direction as the first direction. In other words, in the first embodiment, in each of the plurality of photovoltaic strings 30, the two or more photovoltaic cells 31 are arranged in a state of being arranged in the +Y direction as the first direction.

[0074] Furthermore, for example, when the multiple solar cell strings 30 are viewed in a plan view from the first surface 1f side, in each of the multiple solar cell strings 30, the distance in the third direction between two adjacent solar cell cells 31 among two or more solar cell cells 31 may be the first distance I1. In the first embodiment, for example, when the multiple solar cell strings 30 are viewed in a plan view from the first surface 1f side, the distance in the +Y direction as the first direction between two adjacent solar cell cells 31 among two or more solar cell cells 31 in each of the multiple solar cell strings 30 may be the first distance I1. When the multiple solar cell strings 30 are viewed in a plan view from the first surface 1f side, this may mean that the multiple solar cell strings 30 are viewed in a plan view in a direction normal to the first surface 1f. In other words, when the multiple solar cell strings 30 are viewed in a plan view from the first surface 1f side, this may mean that the multiple solar cell cells 31 are viewed in a plan view toward the −Z direction.

[0075] Here, for example, it is assumed that each of the multiple solar cell strings 30 includes three or more solar cell cells 31. In this case, in each of the multiple solar cell strings 30, the interval between adjacent two solar cell cells 31 for all pairs of adjacent two solar cell cells 31 in the solar cell string 30 may be the same first interval I1. The "same interval" here may be, for example, an interval that allows for tolerances that may occur due to the manufacturing accuracy of the solar cell string 30 when the solar cell string 30 is manufactured such that the interval between adjacent two solar cell cells 31 for all pairs of adjacent two solar cell cells 31 in the solar cell string 30 is the same. In other words, in each of the multiple solar cell strings 30, the interval between adjacent two solar cell cells 31 for all pairs of adjacent two solar cell cells 31 in the solar cell string 30 may be substantially the same first interval I1.

[0076] The first interval I1 may be set in the range of 1.5 millimeters (mm) to 4 mm. For example, the first interval I1 may be set to any of 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, and 4 mm. Here, for example, if the first interval I1 is 1.5 mm or more, the occurrence of a defect in which cracks occur in the solar cell 31 due to the force applied from the third wiring member 32 to the solar cell 31 when the power generating body 10 expands due to heating and contracts due to cooling can be reduced. For example, if the first interval I1 is 4 mm or less, when the first surface 1f is viewed in plan, the area occupied by the multiple solar cell 31 in the area of ​​the power generating body 10 increases, and the conversion efficiency of the solar cell module 100 can be improved.

[0077] In each of the plurality of solar cell strings 30, the plurality of third wiring members 32 electrically connect two or more solar cells 31 in series. In other words, in each solar cell string 30, two or more solar cells 31, which are all of the solar cells 31 constituting the solar cell string 30, are electrically connected in series by the plurality of third wiring members 32. Here, in each of the plurality of solar cell strings 30, the plurality of third wiring members 32 electrically connect each two adjacent solar cells 31 among the two or more solar cells 31. For example, the third wiring member 32 connects the busbar portion 311b on the first cell surface F1 side of one solar cell 31 to the second output portion 312b on the second cell surface F2 side of another solar cell 31 adjacent to the one solar cell 31.

[0078] Here, for example, a case is assumed in which the multiple solar cell strings 30 are viewed in a plan view from the first surface 1f side. In this case, in each of the multiple solar cell strings 30, each of the multiple third wiring members 32 is positioned along the third direction. In other words, when the multiple solar cell strings 30 are viewed in a plan view from the first surface 1f side, the third wiring member 32 has an elongated shape that is aligned with the third direction. In further other words, when the multiple solar cell strings 30 are viewed in a plan view from the first surface 1f side, the third wiring member 32 has a longitudinal direction that is aligned with the third direction. In the first embodiment, for example, in each of the multiple solar cell strings 30, each of the multiple third wiring members 32 is positioned along the +Y direction, which is the first direction.

[0079] Here, for example, between the third wiring member 32 and the busbar portion 311b, there is a portion (also referred to as a first joint portion) that joins the third wiring member 32 and the busbar portion 311b. Therefore, for example, the third wiring member 32 is joined to the busbar portion 311b of one solar cell 31 via the first joint portion. Furthermore, for example, between the third wiring member 32 and the second output portion 312b, there is a portion (also referred to as a second joint portion) that joins the third wiring member 32 and the second output portion 312b. Therefore, for example, the third wiring member 32 is joined to the second output portion 312b of another solar cell 31 adjacent to the one solar cell 31 via the second joint portion.

[0080] The third wiring member 32 may be, for example, a linear or strip-shaped conductive metal body. The cross-sectional shape of the third wiring member 32 perpendicular to the longitudinal direction may be, for example, a polygonal shape such as a rectangle, triangle, or trapezoid, a curved shape such as a circle or ellipse, or a shape combining a polygonal shape and a curved shape. The width of the third wiring member 32 is set to, for example, 0.2 mm to 1.5 mm. The thickness of the third wiring member 32 is set to, for example, 0.1 mm to 1.5 mm. The width of the third wiring member 32 refers to, for example, the length of the third wiring member 32 in a direction perpendicular to the longitudinal direction (also referred to as the width direction) when the first cell surface F1 of the solar cell 31 is viewed in plan. The thickness of the third wiring member 32 refers to, for example, the length of the third wiring member 32 in a direction perpendicular to both the longitudinal direction and the width direction (also referred to as the thickness direction). The material of the conductive metal body used for the third wiring member 32 may be, for example, a good conductor such as copper.

[0081] The first and second joint portions may be made of a low-melting-point alloy such as solder or a low-melting-point simple metal. For example, the entire surface of the third wiring member 32 may be covered with solder. The third wiring member 32 is electrically connected to the busbar portion 311b and the second output portion 312b by soldering, for example. Here, for example, the solder located between the third wiring member 32 and the busbar portion 311b constitutes the first joint portion. Furthermore, for example, the solder located between the third wiring member 32 and the second output portion 312b constitutes the second joint portion.

[0082] As shown in FIG. 3 , a plurality of third wiring members 32 may electrically connect two adjacent solar cells 31. The plurality of third wiring members 32 may be a predetermined number, such as nine. In this case, the number of third wiring members 32 in the solar cell string 30 may be the number obtained by subtracting one from the number of two or more solar cells 31 constituting the solar cell string 30 and multiplying the number by the predetermined number. Here, the predetermined number is not limited to nine. This predetermined number may be the same as the number of busbar portions 311b on the first cell surface F1 side of one solar cell 31. The number of busbar portions 311b on the first cell surface F1 side of one solar cell 31 may be any number between five and twenty, for example.

[0083] Here, for example, a case is assumed in which the multiple solar cell strings 30 are viewed in plan from the first surface 1f side. In this case, for example, the distance between two adjacent solar cell strings 30 in the multiple solar cell strings 30 in the +X direction as the second direction may be the second distance I2. More specifically, for example, if the multiple solar cell strings 30 in the power generating body 10 include three or more solar cell strings 30, the distance between two adjacent solar cell strings 30 in all pairs of the multiple solar cell strings 30 may be the same second distance I2. The "same distance" referred to here may be, for example, the same distance that allows for tolerances that may occur due to the manufacturing precision of the solar cell unit 3 when the solar cell unit 3 is manufactured such that the distance between two adjacent solar cell strings 30 in all pairs of adjacent solar cell strings 30 in the multiple solar cell strings 30 is the same. In other words, for all pairs of two adjacent solar cell strings 30 among the plurality of solar cell strings 30, the interval between the two adjacent solar cell strings 30 may be substantially the same second interval I2.

[0084] The second interval I2 may be set in the range of 1.5 mm to 4 mm, similar to the first interval I1. For example, the second interval I2 may be set to any of 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, and 4 mm.

[0085] <<Multiple First Wiring Members>> Each of the multiple first wiring members 33 electrically connects two adjacent solar cell strings 30 among the multiple solar cell strings 30. The multiple first wiring members 33 may, for example, electrically connect the multiple solar cell strings 30 in series. The first wiring members 33 may, for example, be strip-shaped conductive metal bodies. The width of the first wiring member 33 may be, for example, a width w1. The width w1 may, for example, be 6 mm or approximately 6 mm. The thickness of the first wiring member 33 may, for example, be 0.1 mm to 1.5 mm. The width of the first wiring member 33 refers to, for example, the length of the first wiring member 33 in a direction perpendicular to the longitudinal direction (also referred to as the width direction) when the first surface 1f is viewed in plan. The thickness of the first wiring member 33 refers to, for example, the length of the first wiring member 33 in a direction perpendicular to both the longitudinal direction and the width direction (also referred to as the thickness direction). A good conductor such as copper is used as the material of the conductive metal body applied to the first wiring members 33. In the first embodiment, when the first surface 1f is viewed in plan, the longitudinal direction of the plurality of first wiring members 33 may be along the +X direction as the second direction.

[0086] Here, for example, a case is assumed in which the solar cell unit 3 is viewed in plan from the first surface 1f side. In this case, the distance between the plurality of first wiring members 33 and the plurality of solar cells 31 may be, for example, distance d1. Distance d1 is set to, for example, 3 mm or approximately 3 mm. When the solar cell unit 3 is viewed in plan from the first surface 1f side, this may mean that the solar cell unit 3 is viewed in plan in a direction along the normal to the first surface 1f. In other words, when the solar cell unit 3 is viewed in plan from the first surface 1f side, this may mean that the solar cell unit 3 is viewed in plan in the -Z direction.

[0087] <<Multiple Second Wiring Members>> Each of the multiple second wiring members 34 is a wiring member for outputting power from the solar cell unit 3. The multiple second wiring members 34 include, for example, a first second wiring member (also referred to as a first second wiring member) 34 and a second second wiring member (also referred to as a second second wiring member) 34. For example, the first second wiring member 34 may be electrically connected to a solar cell string 30 located at an end of the multiple solar cell strings 30 in the direction in which the multiple solar cell strings 30 are arranged (also referred to as the fourth direction). The fourth direction may also be referred to as a direction along the third long side 3Ls and the fourth long side 4Ls of the solar cell 31. The second second wiring member 34 may be electrically connected to a solar cell string 30 located at an end of the multiple solar cell strings 30 in the direction opposite to the fourth direction. In the first embodiment, the fourth direction may be, for example, the +X direction as the second direction. In other words, the first second wiring member 34 may be electrically connected to the solar cell string 30 located at the end of the multiple solar cell strings 30 in the +X direction, which is the second direction. The second second wiring member 34 may be electrically connected to the solar cell string 30 located at the end of the multiple solar cell strings 30 in the −X direction, which is the direction opposite to the second direction.

[0088] The first second wiring member 34 may have, for example, a portion (also referred to as a first portion) (not shown) drawn out to the outside of the power generator 10. The second second wiring member 34 may have, for example, a portion (also referred to as a second portion) (not shown) drawn out to the outside of the power generator 10. The first portion of the first second wiring member 34 and the second portion of the second second wiring member 34 may each be located in a state drawn out to the outside of the power generator 10, for example, via a hole penetrating the second protective member 2. The first portion of the first second wiring member 34 and the second portion of the second second wiring member 34 may each be connected to, for example, the terminal box J1.

[0089] The second wiring member 34 may be, for example, a strip-shaped conductive metal body, similar to the first wiring member 33. The width of the second wiring member 34 is set to, for example, width w1, similar to the width of the first wiring member 33. The thickness of the second wiring member 34 is set to, for example, 0.1 mm to 1.5 mm, similar to the thickness of the first wiring member 33. The width of the second wiring member 34 refers to, for example, the length of the second wiring member 34 in a direction perpendicular to the longitudinal direction (also referred to as the width direction) when the first surface 1f is viewed in a plan view. The thickness of the second wiring member 34 refers to, for example, the length of the second wiring member 34 in a direction perpendicular to both the longitudinal direction and the width direction (also referred to as the thickness direction). The material of the conductive metal body used for the second wiring member 34 may be, for example, copper, similar to the first wiring member 33. In the first embodiment, when the first surface 1f is viewed in a plan view, the longitudinal direction of the second wiring member 34 may be along the +X direction, which is the second direction.

[0090] Here, for example, a case is assumed in which the solar cell unit 3 is viewed in plan from the first surface 1f side. In this case, the distance between the plurality of second wiring members 34 and the plurality of solar cells 31 may be distance d1, which is the same as the distance between the plurality of first wiring members 33 and the plurality of solar cells 31. Distance d1 is set to, for example, 3 mm or approximately 3 mm. The distance between the plurality of second wiring members 34 and the plurality of solar cells 31 may be different from the distance between the plurality of first wiring members 33 and the plurality of solar cells 31, for example.

[0091] <1-1-4. Sealant> The sealant 4 is located in a state where it seals the solar cell unit 3 in the gap between the first protective member 1 and the second protective member 2. From another perspective, the sealant 4 is, for example, in a state where it covers the solar cell unit 3. For example, the sealant 4 is in contact with both the second surface 1s and the third surface 2f. In other words, the sealant 4 is located in a state where it fills the region between the first protective member 1 and the second protective member 2 and covers the solar cell unit 3 between the first protective member 1 and the second protective member 2. The sealant 4 includes, for example, a sealant (also referred to as a first sealant) 41 located on the front surface 10f side and a sealant (also referred to as a second sealant) 42 located on the back surface 10b side. The first sealant 41 is, for example, in a state where it covers the entire surface of the solar cell unit 3 on the first protective member 1 side. In other words, the first sealing material 41 is in a state of covering the solar cell unit 3, for example, between the first protective member 1 and the solar cell unit 3. The second sealing material 42 is in a state of covering, for example, substantially the entire surface of the solar cell unit 3 on the second protective member 2 side. In other words, the second sealing material 42 is in a state of covering the solar cell unit 3, for example, between the second protective member 2 and the solar cell unit 3. Therefore, the solar cell unit 3 is in a state of being sandwiched and surrounded by the first sealing material 41 and the second sealing material 42, for example. This allows the sealing material 4 to maintain the posture of the solar cell unit 3, for example.

[0092] The sealing material 4 is, for example, translucent. Here, the sealing material 4 is, for example, translucent to light in the specific wavelength range described above. For example, if at least the first sealing material 41 of the first sealing material 41 and the second sealing material 42 constituting the sealing material 4 is translucent, incident light from the front surface 10f can reach the solar cell unit 3. For example, a resin is used as the material for each of the first sealing material 41 and the second sealing material 42. More specifically, the first sealing material 41 is made of, for example, ethylene-vinyl acetate copolymer (EVA), polyvinyl acetal such as polyvinyl butyral (PVB), or polyolefin elastomer (POE). Here, if the first sealing material 41 is made of, for example, relatively inexpensive EVA, the ability to protect the multiple solar cell units 31 can be easily achieved. The second sealing material 42 may be made of, for example, polyvinyl acetal such as EVA or PVB, or POE, as is the case with the first sealing material 41. Each of the first sealing material 41 and the second sealing material 42 may be made of, for example, two or more types of materials.

[0093] The power generating unit 10 may further include a packing portion (not shown) located along a ring-shaped portion of the region between the first protective member 1 and the second protective member 2 that is open to the external space. In this case, the packing portion is located, for example, in a state surrounding the outer periphery of the region of the gap between the first protective member 1 and the second protective member 2 that includes the solar cell unit 3 and the sealing material 4. Here, the packing portion is located, for example, in a form that fills the region from the first protective member 1 to the second protective member 2. Here, for example, if the packing portion has a lower moisture permeability than the sealing material 4, the packing portion can seal the portion of the gap between the first protective member 1 and the second protective member 2 that is along the outer periphery. This allows the packing portion to reduce, for example, the penetration of moisture and the like from the outside of the power generating unit 10 toward the solar cell unit 3. Examples of the material for the packing portion include butyl-based resins, polyisopropylene-based resins, and acrylic-based resins. For example, the material for the packing portion may include metals such as copper or solder, or non-metals such as glass, as long as it has low moisture permeability.

[0094] <1-1-5. Configuration of the Periphery of the Power Generator> Here, when the first surface 1f is viewed in a plan view, the distance between the first long side 1Ls and the solar cell unit 3 in the +Y direction as a first direction is defined as a first distance D1. When the first surface 1f is viewed in a plan view, the distance between the solar cell unit 3 and the second long side 2Ls in the +Y direction as a first direction is defined as a second distance D2. When the first surface 1f is viewed in a plan view, the distance between the first short side 1Ss and the solar cell unit 3 in the +X direction as a second direction is defined as a third distance D3. When the first surface 1f is viewed in a plan view, the distance between the solar cell unit 3 and the second short side 2Ss in the +X direction as a second direction is defined as a fourth distance D4.

[0095] In the power generating body 10 according to the first embodiment, the following first condition is satisfied, and the following second condition is also satisfied.

[0096] The first condition is that the sum of the first distance D1 and the second distance D2 is less than half the fourth length L4.

[0097] The second condition is that the sum of the third distance D3 and the fourth distance D4 is less than half the third length L3.

[0098] If the power generating body 10 satisfies the first and second conditions described above, when the first surface 1f is viewed in a planar view, the area of ​​the multiple solar cell cells 31 relative to the area of ​​the power generating body 10 will be larger, and the conversion efficiency of the solar cell module 100 may be improved.

[0099] Here, for example, if each of the first distance D1, the second distance D2, the third distance D3, and the fourth distance D4 is equal to or greater than a predetermined distance, a distance can be ensured between the outer peripheral side surface of the power generation body 10 and the solar cell unit 3. This can reduce the occurrence of a short circuit between the solar cell unit 3 and the outside of the power generation body 10. In other words, the insulation between the solar cell unit 3 and the outside of the power generation body 10 can be improved. Furthermore, the arrival of moisture and the like from the outside of the power generation body 10 to the solar cell unit 3 can be reduced. The predetermined distance may be, for example, 8 mm. This predetermined distance is not limited to 8 mm and may be changed as appropriate depending on the structure of the outer peripheral portion of the power generation body 10, such as the material of the sealing material 4 and the presence or absence of a packing portion.

[0100] The first condition may be, for example, that each of the first distance D1 and the second distance D2 is less than one-fourth of the fourth length L4, and the second condition may be, for example, that each of the third distance D3 and the fourth distance D4 is less than one-fourth of the third length L3.

[0101] <1-1-6. Standard Size of Solar Cell> Here, for example, the third length L3 may be the standard length of the solar cell. The standard length of the solar cell may be the length of the solar cell in a direction along one side of the solar cell when the rectangular light-receiving surface (also referred to as the first cell surface or the front surface) of the solar cell is viewed in plan. Here, the solar cell may be plate-shaped. A plate-shaped solar cell has, for example, a first plate surface (also referred to as the front surface, the front surface, or the first cell surface) as a rectangular light-receiving surface, a second plate surface (also referred to as the back surface or the second cell surface) opposite the first plate surface, and multiple end faces (also referred to as side faces) connecting the first plate surface and the second plate surface. Here, the first plate surface as the light-receiving surface has a first pair of opposing first sides (also referred to as the first sides) and a second pair of opposing second sides (also referred to as the second sides). Therefore, the one side of the solar cell may be either the first side or the second side of the first plate surface serving as the light-receiving surface of the solar cell. When the light-receiving surface of the solar cell is viewed in a planar view, this may mean when the solar cell is viewed in a planar view in a direction along the normal to the light-receiving surface. On each of the first plate surface and the second plate surface of the solar cell, some of the four corners may be arc-shaped or may have a shape with C-chamfered corners.

[0102] For example, if the solar cell 31 is formed by dividing the mother substrate 31P, the standard length of the solar cell may be a length corresponding to the standard size of the mother substrate 31P. For example, assuming that the third cell surface F1P of the mother substrate 31P is viewed in a plan view, the standard length of the solar cell may be the length of the third cell surface F1P in a direction along one side of the third cell surface F1P. For example, if the shape of the third cell surface F1P of the mother substrate 31P is square or rectangular, the standard size of the mother substrate 31P may be a size defined by the standard length of the third cell surface F1P in a direction along each of a first pair of opposing sides (first sides) of the third cell surface F1P and the standard length of the third cell surface F1P in a direction along each of a second pair of opposing sides (second sides) of the third cell surface F1P. The direction along each of the pair of first sides and the direction along each of the pair of second sides may be orthogonal to each other. As described above, if the third length L3 of the solar cell 31 is the standard length of a solar cell, then by dividing the mother substrate 31P having a standard size corresponding to this standard length, it is possible to prepare a plurality of solar cells 31 each having a rectangular first cell surface F1 and second cell surface F2 that are applicable to the power generating body 10. In this way, a plurality of solar cells 31 can be prepared efficiently.

[0103] The standard length of the solar cell corresponding to the third length L3 may be, for example, any one of the first standard length L3A, the second standard length L3B, and the third standard length L3C. The first standard length L3A, the second standard length L3B, and the third standard length L3C may be different lengths. The first standard length L3A may be, for example, 200 mm or more. The second standard length L3B may be, for example, smaller than the first standard length L3A. The third standard length L3C may be, for example, larger than the second standard length L3B and smaller than the first standard length L3A. The first standard length L3A may be, for example, 210 mm. The second standard length L3B may be, for example, 158.75 mm. The third standard length L3C may be, for example, 182 mm.

[0104] In this case, when any of three types of mother boards 31P having mutually different standard sizes is used, the mother board 31P can be divided to prepare a plurality of rectangular solar cells 31 that can be applied to the power generating body 10. Here, the three types of mother boards 31P may be a first type of mother board 31PA having a light receiving surface (also referred to as a first standard light receiving surface) F1PA of a first standard size corresponding to a first standard length L3A, a second type of mother board 31PB having a light receiving surface (also referred to as a second standard light receiving surface) F1PB of a second standard size corresponding to a second standard length L3B, and a third type of mother board 31PC having a light receiving surface (also referred to as a third standard light receiving surface) F1PC of a third standard size corresponding to a third standard length L3C.

[0105] For example, a first-type mother substrate 31PA, which is a large solar cell having a first-standard light-receiving surface F1PA, may be referred to as a solar cell having a first-standard size (also referred to as a first-standard solar cell). In this case, the first-type mother substrate 31PA as a first-standard solar cell having a first-standard light-receiving surface F1PA may be divided in a direction along one side of the first-standard light-receiving surface F1PA to prepare first-type solar cells 31 (also referred to as first-type solar cells 31A) having a first-standard length L3A as the third length L3. The first-standard light-receiving surface F1PA may be, for example, a square surface having a length (also referred to as a first width or vertical width) along a first pair of opposing sides (first sides) and a length (also referred to as a second width or horizontal width) each of which is 210 mm. The size standard (also referred to as the size standard) for a solar cell having a square light-receiving surface with a first width and a second width of 210 mm each is also referred to as "G12." Here, the first type solar cell 31A may have, for example, a rectangular light-receiving surface (also referred to as the first light-receiving surface or the firstA cell surface) F1A corresponding to the first cell surface F1. When the first light-receiving surface F1A is viewed in plan, the first type solar cell 31A has two opposing long sides and two opposing short sides. These two long sides may be referred to as a thirdA long side 3LsA and a fourthA long side 4LsA. These two short sides may be referred to as a thirdA short side 3SsA and a fourthA short side 4SsA. When the first light receiving surface F1A is viewed in a plan view, the first type solar cell 31A may have a length (also referred to as the 3A length) that is the first standard length L3A in the direction along each of the third A long side 3LsA and the fourth A long side 4LsA. When the first light receiving surface F1A is viewed in a plan view, this may mean when the first type solar cell 31A is viewed in a plan view in the direction along the normal to the first light receiving surface F1A.

[0106] For example, a second-type mother substrate 31PB that is a large solar cell having a second-standard light-receiving surface F1PB may be referred to as a solar cell having a second-standard size (also referred to as a second-standard solar cell). In this case, the second-type mother substrate 31PB as a second-standard solar cell having a second-standard light-receiving surface F1PB may be divided in a direction along one side of the second-standard light-receiving surface F1PB to prepare second-type solar cells 31 (also referred to as second-type solar cells 31B) having a second-standard length L3B as the third length L3. The second-standard light-receiving surface F1PB may have a square shape with a length (first width) of 158.75 mm along each of a first pair of opposing sides (first sides) and a length (second width) of 158.75 mm along each of a second pair of opposing sides (second sides). The size standard (size standard) type for solar cells having a square light-receiving surface with a first width and a second width of 158.75 mm each is also referred to as "G1." Here, the second type solar cell 31B may have, for example, a rectangular light-receiving surface (also referred to as a second light-receiving surface or a firstB cell surface) F1B corresponding to the first cell surface F1. When the second light-receiving surface F1B is viewed in plan, the second type solar cell 31B has two opposing long sides and two opposing short sides. These two long sides may be referred to as a thirdB long side 3LsB and a fourthB long side 4LsB. These two short sides may be referred to as a thirdB short side 3SsB and a fourthB short side 4SsB. When the second light receiving surface F1B is viewed in a plan view, the second type solar cell 31B may have a length (also referred to as a third B length) that is the second standard length L3B in the direction along each of the third B long side 3LsB and the fourth B long side 4LsB. When the second light receiving surface F1B is viewed in a plan view, this may mean when the second type solar cell 31B is viewed in a plan view in the direction along the normal to the second light receiving surface F1B.

[0107] For example, a third-type mother substrate 31PC, which is a large solar cell having a third-standard light-receiving surface F1PC, may be referred to as a solar cell having a third-standard size (also referred to as a third-standard solar cell). In this case, the third-type mother substrate 31PC as a third-standard solar cell having a third-standard light-receiving surface F1PC may be divided in a direction along one side of the third-standard light-receiving surface F1PC to prepare a third-type solar cell 31 (also referred to as a third-type solar cell 31C) having a third-standard length L3 as the third length L3. The third-standard light-receiving surface F1PC may have a square shape, for example, with a length (first width) along a first pair of opposing sides (first sides) and a length (second width) along a second pair of opposing sides (second sides), each of which is 182 mm. The size standard (size standard) type for solar cells having a square light-receiving surface with a first width and a second width each of 182 mm is also referred to as "M10." Here, the third type solar cell 31C may have, for example, a rectangular light-receiving surface (also referred to as a third light-receiving surface or a first C cell surface) F1C corresponding to the first cell surface F1. When the third light-receiving surface F1C is viewed in plan, the third type solar cell 31C has two opposing long sides and two opposing short sides. These two long sides may be referred to as a third C long side 3LsC and a fourth C long side 4LsC. These two short sides may be referred to as a third C short side 3SsC and a fourth C short side 4SsC. When the third light receiving surface F1C is viewed in a plan view, the third type solar cell 31C may have a length that is the third standard length L3C (also referred to as the third C length) in the directions along the third long side 3LsC and the fourth long side 4LsC. When the third light receiving surface F1C is viewed in a plan view, this may mean when the third type solar cell 31C is viewed in a plan view in the direction along the normal to the third light receiving surface F1C.

[0108] Here, for example, the first type of solar cell 31A can be prepared by dividing the first type of mother substrate 31PA into two equal parts along a direction along one side of the first-standard light-receiving surface F1PA. For example, the second type of solar cell 31B can be prepared by dividing the second type of mother substrate 31PB into two equal parts along a direction along one side of the second-standard light-receiving surface F1PB. For example, the third type of solar cell 31C can be prepared by dividing the third type of mother substrate 31PC into two equal parts along a direction along one side of the third-standard light-receiving surface F1PC. In this way, all parts of the mother substrate 31P can be effectively utilized, and multiple solar cells 31 can be prepared.

[0109] In the present disclosure, the division into two equal parts may be, for example, a division into two equal parts in a direction along one side of the light-receiving surface of the mother substrate 31P, in which a tolerance that may arise due to the precision with which the mother substrate 31P is divided is allowed. In other words, the division into two equal parts may be a division into substantially two equal parts. Here, a tolerance of, for example, several millimeters may be allowed.

[0110] <1-2. Changing the Size of Multiple Solar Cells> Here, for example, the first length L1 may be set to 1316 mm to 1377 mm, and the second length L2 may be set to 778 mm to 804 mm. In other words, for example, the upper limit of the first length L1 may be set to 1377 mm, the lower limit of the first length L1 may be set to 1316 mm, the upper limit of the second length L2 may be set to 804 mm, and the lower limit of the second length L2 may be set to 778 mm. In other words, for example, the power generating body 10 may satisfy a dimensional condition (also referred to as a first dimensional condition) in which the first length L1 is 1316 mm to 1377 mm and the second length L2 is 778 mm to 804 mm.

[0111] In this case, for example, in a power generating body 10 having the same size when the first surface 1f is viewed in a plan view, the arrangement of the plurality of solar cells 31 may be the first arrangement described above, and the combination of the third length L3 and the fourth length L4 may be changed as appropriate while satisfying the first and second conditions described above. Here, the size of the solar cell 31 may be changed depending on the combination of the third length L3 and the fourth length L4. In the power generating body 10, for example, various specific configurations such as the number of the plurality of solar cell cells 31, the number of the plurality of solar cell strings 30, and the electrical connection configuration between the plurality of solar cell strings 30 may be changed in accordance with a change in the combination of the third length L3 and the fourth length L4.

[0112] For example, an example of a power generating body 10 according to the first embodiment (also referred to as a first power generating body) 10A shown in FIG. 3 has a first arrangement of the plurality of solar cells 31, and each of the plurality of solar cells 31 is a first type of solar cell 31A. Here, for example, the third length L3 may be 210 mm, which is the first standard length L3A, and the fourth length L4 may be 105 mm or approximately 105 mm, which is half of the first standard length L3A. In other words, for example, the value obtained by dividing the fourth length L4 by the third length L3 may be 1 / 2 or approximately 1 / 2. A solar cell 31 having a third length L3 of 210 mm and a fourth length L4 of 105 mm can be fabricated, for example, by dividing a mother substrate 31P having the above-mentioned G12 size standard into two.

[0113] For example, another example of the power generating body 10 according to the first embodiment (also referred to as a second power generating body) 10B shown in FIG. 18 has a first arrangement of the solar cells 31, and each of the solar cells 31 is a second type of solar cell 31B. Here, for example, the third length L3 may be 158.75 mm, which is the second standard length L3B, and the fourth length L4 may be 79.375 mm or approximately 79.375 mm, which is half of the second standard length L3B. In other words, for example, the value obtained by dividing the fourth length L4 by the third length L3 may be 1 / 2 or approximately 1 / 2. A solar cell 31 having a third length L3 of 158.75 mm and a fourth length L4 of 79.375 mm can be produced, for example, by dividing a mother substrate 31P having the above-mentioned G1 size standard into two.

[0114] For example, another example of the power generating body 10 according to the first embodiment (also referred to as a third power generating body) 10C shown in FIG. 20 has a first arrangement of the solar cells 31, and each of the solar cells 31 is a third type of solar cell 31C. Here, for example, the third length L3 may be 182 mm, which is the third standard length L3C, and the fourth length L4 may be 91 mm or approximately 91 mm, which is half of the third standard length L3C. In other words, for example, the value obtained by dividing the fourth length L4 by the third length L3 may be 1 / 2 or approximately 1 / 2. A solar cell 31 having a third length L3 of 182 mm and a fourth length L4 of 91 mm can be fabricated, for example, by dividing a mother substrate 31P having the above-mentioned M10 size standard into two.

[0115] Here, for example, if the third length L3 of the solar cell 31 is the standard length of a solar cell, then by dividing the mother substrate 31P having a standard size corresponding to this standard length, it is possible to prepare a plurality of rectangular solar cell 31 applicable to the power generation body 10 having the same size when the first surface 1f is viewed in plan view. This allows a plurality of solar cell 31 to be prepared efficiently.

[0116] 3 (hereinafter also referred to as the "specific example of FIG. 3"), seven columns of solar cells 31, each made up of six solar cells 31 aligned along the +X direction as the second direction, are aligned along the +Y direction as the first direction. In other words, a total of 42 solar cells 31 in six rows and seven columns are positioned in a matrix along an imaginary XY plane.

[0117] 3 , the solar cell unit 3 includes six solar cell strings 30 as the plurality of solar cell strings 30. More specifically, the six solar cell strings 30 include a first solar cell string 30a, a second solar cell string 30b, a third solar cell string 30c, a fourth solar cell string 30d, a fifth solar cell string 30e, and a sixth solar cell string 30f. The first solar cell string 30a, the second solar cell string 30b, the third solar cell string 30c, the fourth solar cell string 30d, the fifth solar cell string 30e, and the sixth solar cell string 30f are arranged in this order along the +X direction, which is the second direction.

[0118] 3, the first solar cell string 30a, the third solar cell string 30c, and the fifth solar cell string 30e have substantially the same configuration, and the second solar cell string 30b, the fourth solar cell string 30d, and the sixth solar cell string 30f have substantially the same configuration. For example, the configurations of two solar cell strings 30 adjacent to each other in the +X direction as the second direction have a relationship of substantial two-fold rotational symmetry, in which the configurations become substantially the same when rotated 180 degrees around an axis of symmetry parallel to the Z axis.

[0119] For example, the first solar cell string 30a and the second solar cell string 30b have a substantially two-fold rotational symmetry relationship in which they have substantially the same configuration when rotated 180 degrees around an axis of symmetry parallel to the Z axis. For example, the second solar cell string 30b and the third solar cell string 30c have a substantially two-fold rotational symmetry relationship in which they have substantially the same configuration when rotated 180 degrees around an axis of symmetry parallel to the Z axis. For example, the third solar cell string 30c and the fourth solar cell string 30d have a substantially two-fold rotational symmetry relationship in which they have substantially the same configuration when rotated 180 degrees around an axis of symmetry parallel to the Z axis. For example, the fourth solar cell string 30d and the fifth solar cell string 30e have a substantially two-fold rotational symmetry relationship in which they have substantially the same configuration when rotated 180 degrees around an axis of symmetry parallel to the Z axis. For example, the fifth solar cell string 30e and the sixth solar cell string 30f have a substantially two-fold rotational symmetry relationship in which they have approximately the same configuration when rotated 180 degrees around an axis of symmetry parallel to the Z axis.

[0120] 3 , each of the multiple solar cell strings 30 includes seven solar cell cells 31 arranged along the +Y direction as a first direction as two or more solar cell cells 31. More specifically, the seven solar cell cells 31 include a first solar cell 31a, a second solar cell 31b, a third solar cell 31c, a fourth solar cell 31d, a fifth solar cell 31e, a sixth solar cell 31f, and a seventh solar cell 31g. The first solar cell 31a, the second solar cell 31b, the third solar cell 31c, the fourth solar cell 31d, the fifth solar cell 31e, the sixth solar cell 31f, and the seventh solar cell 31g are arranged in the +Y direction as a first direction in this order.

[0121] 3 , in each of the plurality of photovoltaic strings 30, the interval between the two adjacent photovoltaic cells 31 is the same first interval I1 for all pairs of two adjacent photovoltaic cells 31. In other words, in each photovoltaic string 30, the interval between the two adjacent photovoltaic cells 31 is the same first interval I1 for each of six pairs of two adjacent photovoltaic cells 31.

[0122] 3 , in each of the first solar cell string 30 a, the third solar cell string 30 c, and the fifth solar cell string 30 e, for example, as shown in Fig. 16 , the third wiring member 32 connects the busbar portion 311 b on the first cell surface F1 side of one solar cell 31 to the second output portion 312 b on the second cell surface F2 side of another solar cell 31 that is adjacent to the one solar cell 31 in the +Y direction, which is the first direction. Also, in each of the second solar cell string 30 b, the fourth solar cell string 30 d, and the sixth solar cell string 30 f, for example, the third wiring member 32 connects the second output portion 312 b on the second cell surface F2 side of one solar cell 31 to the busbar portion 311 b on the first cell surface F1 side of another solar cell 31 that is adjacent to the one solar cell 31 in the +Y direction, which is the first direction.

[0123] 3 , each of the plurality of third wiring members 32 electrically connects the first solar cell 31 a and the second solar cell 31 b. For example, each of the plurality of third wiring members 32 includes a portion bonded to the first solar cell 31 a and a portion bonded to the second solar cell 31 b. Each of the plurality of third wiring members 32 electrically connects the second solar cell 31 b and the third solar cell 31 c. For example, each of the plurality of third wiring members 32 includes a portion bonded to the second solar cell 31 b and a portion bonded to the third solar cell 31 c. Each of the plurality of third wiring members 32 electrically connects the third solar cell 31 c and the fourth solar cell 31 d. For example, each of the plurality of third wiring members 32 includes a portion bonded to the third solar cell 31c and a portion bonded to the fourth solar cell 31d. Each of the plurality of third wiring members 32 is in a state in which the fourth solar cell 31d and the fifth solar cell 31e are electrically connected. For example, each of the plurality of third wiring members 32 includes a portion bonded to the fourth solar cell 31d and a portion bonded to the fifth solar cell 31e. Each of the plurality of third wiring members 32 is in a state in which the fifth solar cell 31e and the sixth solar cell 31f are electrically connected. For example, each of the plurality of third wiring members 32 includes a portion bonded to the fifth solar cell 31e and a portion bonded to the sixth solar cell 31f. Each of the plurality of third wiring members 32 is in a state in which the sixth solar cell 31f and the seventh solar cell 31g are electrically connected. For example, each of the multiple third wiring members 32 includes a portion joined to the sixth solar cell 31f and a portion joined to the seventh solar cell 31g.

[0124] 3 , the interval between the two adjacent solar cell strings 30 is the same second interval I2 for all pairs of two adjacent solar cell strings 30. In other words, the interval between the two adjacent solar cell strings 30 is the same second interval I2 for each of five pairs of two adjacent solar cell strings 30.

[0125] In the specific example of FIG. 3 , the plurality of first wiring members 33 are five first wiring members 33 .

[0126] Here, the first first wiring member 33 electrically connects the first solar cell string 30a and the second solar cell string 30b. For example, the first first wiring member 33 is connected to the plurality of second output portions 312b on the second cell surface F2 side of the first solar cell 31a in the first solar cell string 30a by the plurality of third wiring members 32. For example, the first first wiring member 33 is connected to the plurality of busbar portions 311b on the first cell surface F1 side of the first solar cell 31a in the second solar cell string 30b by the plurality of third wiring members 32.

[0127] The second first wiring member 33 electrically connects the second solar cell string 30b and the third solar cell string 30c. For example, the second output portions 312b on the second cell surface F2 side of the seventh solar cell 31g in the second solar cell string 30b are connected to the second first wiring member 33 by the plurality of third wiring members 32. For example, the second first wiring member 33 is connected to the busbar portions 311b on the first cell surface F1 side of the seventh solar cell 31g in the third solar cell string 30c by the plurality of third wiring members 32.

[0128] The third first wiring member 33 electrically connects the third solar cell string 30c and the fourth solar cell string 30d. For example, the third first wiring member 33 is connected to the plurality of second output portions 312b on the second cell surface F2 side of the first solar cell 31a in the third solar cell string 30c by the plurality of third wiring members 32. For example, the third first wiring member 33 is connected to the plurality of busbar portions 311b on the first cell surface F1 side of the first solar cell 31a in the fourth solar cell string 30d by the plurality of third wiring members 32.

[0129] The fourth first wiring member 33 electrically connects the fourth solar cell string 30d and the fifth solar cell string 30e. For example, the fourth first wiring member 33 is connected to the plurality of second output portions 312b on the second cell surface F2 side of the seventh solar cell 31g in the fourth solar cell string 30d by the plurality of third wiring members 32. For example, the fourth first wiring member 33 is connected to the plurality of busbar portions 311b on the first cell surface F1 side of the seventh solar cell 31g in the fifth solar cell string 30e by the plurality of third wiring members 32.

[0130] The fifth first wiring member 33 electrically connects the fifth solar cell string 30e and the sixth solar cell string 30f. For example, the fifth first wiring member 33 is connected to the plurality of second output portions 312b on the second cell surface F2 side of the first solar cell 31a in the fifth solar cell string 30e by the plurality of third wiring members 32. For example, the fifth first wiring member 33 is connected to the plurality of busbar portions 311b on the first cell surface F1 side of the first solar cell 31a in the sixth solar cell string 30f by the plurality of third wiring members 32.

[0131] As a result, the first solar cell string 30a, the second solar cell string 30b, the third solar cell string 30c, the fourth solar cell string 30d, the fifth solar cell string 30e, and the sixth solar cell string 30f are electrically connected in series in the order listed.

[0132] Here, for example, a case is assumed in which the solar cell unit 3 is viewed from the first surface 1f side in a plan view. In this case, the distance between the first first wiring member 33 and the two first solar cells 31a located furthest in the -Y direction in the first solar cell string 30a and the second solar cell string 30b is set to distance d1. For example, the distance between the second first wiring member 33 and the two seventh solar cells 31g located furthest in the +Y direction in the second solar cell string 30b and the third solar cell string 30c is set to distance d1. For example, the distance between the third first wiring member 33 and the two first solar cells 31a located furthest in the -Y direction in the third solar cell string 30c and the fourth solar cell string 30d is set to distance d1. For example, the distance between the fourth first wiring member 33 and the two seventh solar cells 31g located furthest in the +Y direction in the fourth solar cell string 30d and the fifth solar cell string 30e is set to distance d1. For example, the distance between the fifth first wiring member 33 and the two first solar cells 31a located furthest in the −Y direction in the fifth solar cell string 30e and the sixth solar cell string 30f is set to distance d1.

[0133] 3 , the first second wiring member 34 is electrically connected to the sixth solar cell string 30f, and the second second wiring member 34 is electrically connected to the first solar cell string 30a. For example, the first second wiring member 34 is connected to the second output portions 312b on the second cell surface F2 side of the seventh solar cell 31g in the sixth solar cell string 30f by the third wiring members 32. For example, the second second wiring member 34 is connected to the busbar portions 311b on the first cell surface F1 side of the seventh solar cell 31g in the first solar cell string 30a by the third wiring members 32.

[0134] Here, for example, a case is assumed in which the solar cell unit 3 is viewed from the first surface 1f side. In this case, the distance between the first second wiring member 34 and the seventh solar cell 31g located furthest in the +Y direction in the sixth solar cell string 30f is set to distance d1. Furthermore, for example, the distance between the second second wiring member 34 and the seventh solar cell 31g located furthest in the +Y direction in the first solar cell string 30a is set to distance d1.

[0135] Here, for example, as shown in FIG. 17 , the first portion of the first second wiring member 34 may be connected to a first terminal box J1 (also referred to as a first terminal box J11) located on the rear surface 10b of the power generator 10. For example, the second portion of the second second wiring member 34 may be connected to a second terminal box J1 (also referred to as a second terminal box J12) located on the rear surface 10b of the power generator 10. The first terminal box J11 may have a cable for outputting the first pole. The second terminal box J12 may have a cable for outputting the second pole. When the first pole is positive, the second pole is negative, and when the first pole is negative, the second pole is positive. Furthermore, for example, the first second wiring member 34 and the fourth first wiring member 33 may be connected via the first terminal box J11. In this case, the first terminal box J11 may have a bypass diode. Here, the first second wiring member 34 and the fourth first wiring member 33 may be connected via a bypass diode. Furthermore, for example, the second first wiring member 33 and the fourth first wiring member 33 may be connected via a third terminal box J1 (also referred to as a third terminal box J13) located on the back surface 10b side of the power generator 10. In this case, the third terminal box J13 may include a bypass diode. Here, the second first wiring member 33 and the fourth first wiring member 33 may be connected via a bypass diode. Furthermore, for example, the second second wiring member 34 and the second first wiring member 33 may be connected via a second terminal box J12. In this case, the second terminal box J12 may include a bypass diode. Here, the second second wiring member 34 and the second first wiring member 33 may be connected via a bypass diode.

[0136] 18 (hereinafter also referred to as the specific example of FIG. 18 ), nine columns of solar cells 31, each made up of eight solar cells 31 aligned along the +X direction as the second direction, are aligned along the +Y direction as the first direction. In other words, a total of 72 solar cells 31 in eight rows and nine columns are positioned in a matrix along an imaginary XY plane.

[0137] 18 , the solar cell unit 3 includes eight solar cell strings 30 as the plurality of solar cell strings 30. More specifically, the eight solar cell strings 30 include a first solar cell string 30a, a second solar cell string 30b, a third solar cell string 30c, a fourth solar cell string 30d, a fifth solar cell string 30e, a sixth solar cell string 30f, a seventh solar cell string 30g, and an eighth solar cell string 30h. The first solar cell string 30a, the second solar cell string 30b, the third solar cell string 30c, the fourth solar cell string 30d, the fifth solar cell string 30e, the sixth solar cell string 30f, the seventh solar cell string 30g, and the eighth solar cell string 30h are arranged in this order along the +X direction, which is the second direction.

[0138] 18 , for example, the first solar cell string 30 a, the third solar cell string 30 c, the fifth solar cell string 30 e, and the seventh solar cell string 30 g have substantially the same configuration, and the second solar cell string 30 b, the fourth solar cell string 30 d, the sixth solar cell string 30 f, and the eighth solar cell string 30 h have substantially the same configuration. For example, the configurations of two solar cell strings 30 adjacent to each other in the +X direction as the second direction have a relationship of substantial two-fold rotational symmetry, in which the configurations become substantially the same when rotated 180 degrees around an axis of symmetry parallel to the Z axis.

[0139] For example, the first solar cell string 30a and the second solar cell string 30b have a substantially two-fold rotational symmetry relationship in which they have substantially the same configuration when rotated 180 degrees around an axis of symmetry parallel to the Z axis. For example, the second solar cell string 30b and the third solar cell string 30c have a substantially two-fold rotational symmetry relationship in which they have substantially the same configuration when rotated 180 degrees around an axis of symmetry parallel to the Z axis. For example, the third solar cell string 30c and the fourth solar cell string 30d have a substantially two-fold rotational symmetry relationship in which they have substantially the same configuration when rotated 180 degrees around an axis of symmetry parallel to the Z axis. For example, the fourth solar cell string 30d and the fifth solar cell string 30e have a substantially two-fold rotational symmetry relationship in which they have substantially the same configuration when rotated 180 degrees around an axis of symmetry parallel to the Z axis. For example, the fifth solar cell string 30e and the sixth solar cell string 30f have a substantially two-fold rotational symmetry relationship in which they have substantially the same configuration when rotated 180 degrees around an axis of symmetry parallel to the Z axis. For example, the sixth solar cell string 30f and the seventh solar cell string 30g have a substantially two-fold rotational symmetry relationship in which they have substantially the same configuration when rotated 180 degrees around an axis of symmetry parallel to the Z axis. For example, the seventh solar cell string 30g and the eighth solar cell string 30h have a substantially two-fold rotational symmetry relationship in which they have substantially the same configuration when rotated 180 degrees around an axis of symmetry parallel to the Z axis.

[0140] 18 , each of the multiple solar cell strings 30 includes nine solar cell strings 31 arranged along the +Y direction as a first direction as two or more solar cell strings 31. More specifically, the nine solar cell strings 31 include a first solar cell string 31a, a second solar cell string 31b, a third solar cell string 31c, a fourth solar cell string 31d, a fifth solar cell string 31e, a sixth solar cell string 31f, a seventh solar cell string 31g, an eighth solar cell string 31h, and a ninth solar cell string 31i. The first solar cell string 31a, the second solar cell string 31b, the third solar cell string 31c, the fourth solar cell string 31d, the fifth solar cell string 31e, the sixth solar cell string 31f, the seventh solar cell string 31g, the eighth solar cell string 31h, and the ninth solar cell string 31i are arranged in the +Y direction as a first direction in this order.

[0141] 18 , in each of the plurality of photovoltaic strings 30, the interval between two adjacent photovoltaic cells 31 is the same first interval I1 for all pairs of two adjacent photovoltaic cells 31. In other words, in each photovoltaic string 30, the interval between two adjacent photovoltaic cells 31 is the same first interval I1 for each of eight pairs of two adjacent photovoltaic cells 31.

[0142] In one specific example of Figure 18, in each of the first solar cell string 30a, the third solar cell string 30c, the fifth solar cell string 30e and the seventh solar cell string 30g, for example, as shown in Figure 16, the third wiring member 32 connects the busbar portion 311b on the first cell surface F1 side of one solar cell 31 to the second output portion 312b on the second cell surface F2 side of another solar cell 31 adjacent to this one solar cell 31 in the +Y direction, which is the first direction. Furthermore, for example, in each of the second solar cell string 30b, the fourth solar cell string 30d, the sixth solar cell string 30f and the eighth solar cell string 30h, the third wiring member 32 connects the second output portion 312b on the second cell surface F2 side of one solar cell 31 to the busbar portion 311b on the first cell surface F1 side of another solar cell 31 that is adjacent to this one solar cell 31 in the first direction, that is, the +Y direction.

[0143] 18 , each of the plurality of third wiring members 32 electrically connects the first solar cell 31 a and the second solar cell 31 b. For example, each of the plurality of third wiring members 32 includes a portion bonded to the first solar cell 31 a and a portion bonded to the second solar cell 31 b. Each of the plurality of third wiring members 32 electrically connects the second solar cell 31 b and the third solar cell 31 c. For example, each of the plurality of third wiring members 32 includes a portion bonded to the second solar cell 31 b and a portion bonded to the third solar cell 31 c. Each of the plurality of third wiring members 32 electrically connects the third solar cell 31 c and the fourth solar cell 31 d. For example, each of the plurality of third wiring members 32 includes a portion bonded to the third solar cell 31c and a portion bonded to the fourth solar cell 31d. Each of the plurality of third wiring members 32 is in a state in which the fourth solar cell 31d and the fifth solar cell 31e are electrically connected. For example, each of the plurality of third wiring members 32 includes a portion bonded to the fourth solar cell 31d and a portion bonded to the fifth solar cell 31e. Each of the plurality of third wiring members 32 is in a state in which the fifth solar cell 31e and the sixth solar cell 31f are electrically connected. For example, each of the plurality of third wiring members 32 includes a portion bonded to the fifth solar cell 31e and a portion bonded to the sixth solar cell 31f. Each of the plurality of third wiring members 32 is in a state in which the sixth solar cell 31f and the seventh solar cell 31g are electrically connected. For example, each of the plurality of third wiring members 32 includes a portion joined to the sixth solar cell 31f and a portion joined to the seventh solar cell 31g. Each of the plurality of third wiring members 32 is in a state in which the seventh solar cell 31g and the eighth solar cell 31h are electrically connected. For example, each of the plurality of third wiring members 32 includes a portion joined to the seventh solar cell 31g and a portion joined to the eighth solar cell 31h. Each of the plurality of third wiring members 32 is in a state in which the eighth solar cell 31h and the ninth solar cell 31i are electrically connected.For example, each of the multiple third wiring members 32 includes a portion joined to the eighth solar cell 31h and a portion joined to the ninth solar cell 31i.

[0144] 18 , the interval between the two adjacent solar cell strings 30 is the same second interval I2 for all pairs of two adjacent solar cell strings 30. In other words, the interval between the two adjacent solar cell strings 30 is the same second interval I2 for each of seven pairs of two adjacent solar cell strings 30.

[0145] In the specific example of FIG. 18 , the plurality of first wiring members 33 are seven first wiring members 33 .

[0146] Here, the first first wiring member 33 electrically connects the first solar cell string 30a and the second solar cell string 30b. For example, the first first wiring member 33 is connected to the plurality of second output portions 312b on the second cell surface F2 side of the first solar cell 31a in the first solar cell string 30a by the plurality of third wiring members 32. For example, the first first wiring member 33 is connected to the plurality of busbar portions 311b on the first cell surface F1 side of the first solar cell 31a in the second solar cell string 30b by the plurality of third wiring members 32.

[0147] The second first wiring member 33 electrically connects the second solar cell string 30b and the third solar cell string 30c. For example, the second output portions 312b on the second cell surface F2 side of the ninth solar cell 31i in the second solar cell string 30b are connected to the second first wiring member 33 by the plurality of third wiring members 32. For example, the second first wiring member 33 is connected to the busbar portions 311b on the first cell surface F1 side of the ninth solar cell 31i in the third solar cell string 30c by the plurality of third wiring members 32.

[0148] The third first wiring member 33 electrically connects the third solar cell string 30c and the fourth solar cell string 30d. For example, the third first wiring member 33 is connected to the plurality of second output portions 312b on the second cell surface F2 side of the first solar cell 31a in the third solar cell string 30c by the plurality of third wiring members 32. For example, the third first wiring member 33 is connected to the plurality of busbar portions 311b on the first cell surface F1 side of the first solar cell 31a in the fourth solar cell string 30d by the plurality of third wiring members 32.

[0149] The fourth first wiring member 33 electrically connects the fourth solar cell string 30d and the fifth solar cell string 30e. For example, the fourth first wiring member 33 is connected to the plurality of second output portions 312b on the second cell surface F2 side of the ninth solar cell 31i in the fourth solar cell string 30d by the plurality of third wiring members 32. For example, the fourth first wiring member 33 is connected to the plurality of busbar portions 311b on the first cell surface F1 side of the ninth solar cell 31i in the fifth solar cell string 30e by the plurality of third wiring members 32.

[0150] The fifth first wiring member 33 electrically connects the fifth solar cell string 30e and the sixth solar cell string 30f. For example, the fifth first wiring member 33 is connected to the plurality of second output portions 312b on the second cell surface F2 side of the first solar cell 31a in the fifth solar cell string 30e by the plurality of third wiring members 32. For example, the fifth first wiring member 33 is connected to the plurality of busbar portions 311b on the first cell surface F1 side of the first solar cell 31a in the sixth solar cell string 30f by the plurality of third wiring members 32.

[0151] The sixth first wiring member 33 electrically connects the sixth solar cell string 30f and the seventh solar cell string 30g. For example, the sixth first wiring member 33 is connected to the plurality of second output portions 312b on the second cell surface F2 side of the ninth solar cell 31i in the sixth solar cell string 30f by the plurality of third wiring members 32. For example, the sixth first wiring member 33 is connected to the plurality of busbar portions 311b on the first cell surface F1 side of the ninth solar cell 31i in the seventh solar cell string 30g by the plurality of third wiring members 32.

[0152] The seventh first wiring member 33 electrically connects the seventh solar cell string 30g and the eighth solar cell string 30h. For example, the seventh first wiring member 33 is connected to the plurality of second output portions 312b on the second cell surface F2 side of the first solar cell 31a in the seventh solar cell string 30g by the plurality of third wiring members 32. For example, the seventh first wiring member 33 is connected to the plurality of busbar portions 311b on the first cell surface F1 side of the first solar cell 31a in the eighth solar cell string 30h by the plurality of third wiring members 32.

[0153] As a result, the first solar cell string 30a, the second solar cell string 30b, the third solar cell string 30c, the fourth solar cell string 30d, the fifth solar cell string 30e, the sixth solar cell string 30f, the seventh solar cell string 30g, and the eighth solar cell string 30h are electrically connected in series in the order listed.

[0154] Here, for example, a case is assumed in which the solar cell unit 3 is viewed from the first surface 1f side in a plan view. In this case, the distance between the first first wiring member 33 and the two first solar cells 31a located furthest in the -Y direction in the first solar cell string 30a and the second solar cell string 30b is set to distance d1. For example, the distance between the second first wiring member 33 and the two ninth solar cells 31i located furthest in the +Y direction in the second solar cell string 30b and the third solar cell string 30c is set to distance d1. For example, the distance between the third first wiring member 33 and the two first solar cells 31a located furthest in the -Y direction in the third solar cell string 30c and the fourth solar cell string 30d is set to distance d1. For example, the distance between the fourth first wiring member 33 and the two ninth solar cells 31i located furthest in the +Y direction in the fourth solar cell string 30d and the fifth solar cell string 30e is set to distance d1. For example, the distance between the fifth first wiring member 33 and the two first solar cells 31a located furthest in the -Y direction in the fifth solar cell string 30e and the sixth solar cell string 30f is set to distance d1. For example, the distance between the sixth first wiring member 33 and the two ninth solar cells 31i located furthest in the +Y direction in the sixth solar cell string 30f and the seventh solar cell string 30g is set to distance d1. For example, the distance between the seventh first wiring member 33 and the two first solar cells 31a located furthest in the -Y direction in the seventh solar cell string 30g and the eighth solar cell string 30h is set to distance d1.

[0155] 18 , the first second wiring member 34 is electrically connected to the eighth solar cell string 30h, and the second second wiring member 34 is electrically connected to the first solar cell string 30a. For example, the first second wiring member 34 is connected to the second output portions 312b on the second cell surface F2 side of the ninth solar cell 31i in the eighth solar cell string 30h by the third wiring members 32. For example, the second second wiring member 34 is connected to the busbar portions 311b on the first cell surface F1 side of the ninth solar cell 31i in the first solar cell string 30a by the third wiring members 32.

[0156] Here, for example, a case is assumed in which the solar cell unit 3 is viewed from the first surface 1f side. In this case, the distance between the first second wiring member 34 and the ninth solar cell 31i located furthest in the +Y direction in the eighth solar cell string 30h is set to distance d1. Furthermore, for example, the distance between the second second wiring member 34 and the ninth solar cell 31i located furthest in the +Y direction in the first solar cell string 30a is set to distance d1.

[0157] 19 , for example, the first portion of the first second wiring member 34 may be connected to a first terminal box J1 (first terminal box J11) located on the back surface 10b of the power generator 10. For example, the second portion of the second second wiring member 34 may be connected to a second terminal box J1 (second terminal box J12) located on the back surface 10b of the power generator 10. Alternatively, for example, the first second wiring member 34 and the sixth first wiring member 33 may be connected via the first terminal box J11. In this case, the first terminal box J11 may have a bypass diode. Here, the first second wiring member 34 and the sixth first wiring member 33 may be connected via the bypass diode. Alternatively, for example, the second first wiring member 33 and the fourth first wiring member 33 may be connected via a third terminal box J1 (third terminal box J13) located on the back surface 10b of the power generator 10. In this case, the third terminal box J13 may include a bypass diode. Here, the second first wiring member 33 and the fourth first wiring member 33 may be connected via the bypass diode. Alternatively, for example, the fourth first wiring member 33 and the sixth first wiring member 33 may be connected via a fourth terminal box J1 (also referred to as a fourth terminal box J14) located on the rear surface 10b side of the power generator 10. In this case, the fourth terminal box J14 may include a bypass diode. Here, the fourth first wiring member 33 and the sixth first wiring member 33 may be connected via the bypass diode. Alternatively, for example, the second second wiring member 34 and the second first wiring member 33 may be connected via the second terminal box J12. In this case, the second terminal box J12 may include a bypass diode. Here, the second second wiring member 34 and the second first wiring member 33 may be connected via the bypass diode.

[0158] 20 (hereinafter also referred to as the specific example of FIG. 20), eight columns of solar cells 31, each made up of seven solar cells 31 aligned along the +X direction as the second direction, are aligned along the +Y direction as the first direction. In other words, a total of 56 solar cells 31 in 7 rows and 8 columns are positioned in a matrix along a virtual XY plane.

[0159] 20 , the solar cell unit 3 includes seven solar cell strings 30 as the plurality of solar cell strings 30. More specifically, the seven solar cell strings 30 include a first solar cell string 30a, a second solar cell string 30b, a third solar cell string 30c, a fourth solar cell string 30d, a fifth solar cell string 30e, a sixth solar cell string 30f, and a seventh solar cell string 30g. The first solar cell string 30a, the second solar cell string 30b, the third solar cell string 30c, the fourth solar cell string 30d, the fifth solar cell string 30e, the sixth solar cell string 30f, and the seventh solar cell string 30g are arranged in this order along the +X direction, which is the second direction.

[0160] 20 , for example, the first solar cell string 30a, the third solar cell string 30c, and the fifth solar cell string 30e have substantially the same configuration, and the second solar cell string 30b, the fourth solar cell string 30d, the sixth solar cell string 30f, and the seventh solar cell string 30g have substantially the same configuration. For example, the first solar cell string 30a, the second solar cell string 30b, the third solar cell string 30c, the fourth solar cell string 30d, the fifth solar cell string 30e, and the sixth solar cell string 30f have substantially two-fold rotational symmetry, in which the configurations of two solar cell strings 30 adjacent to each other in the +X direction as the second direction are substantially the same when rotated 180 degrees about an axis of symmetry parallel to the Z axis.

[0161] For example, the first solar cell string 30a and the second solar cell string 30b have a substantially two-fold rotational symmetry relationship in which they have substantially the same configuration when rotated 180 degrees around an axis of symmetry parallel to the Z axis. For example, the second solar cell string 30b and the third solar cell string 30c have a substantially two-fold rotational symmetry relationship in which they have substantially the same configuration when rotated 180 degrees around an axis of symmetry parallel to the Z axis. For example, the third solar cell string 30c and the fourth solar cell string 30d have a substantially two-fold rotational symmetry relationship in which they have substantially the same configuration when rotated 180 degrees around an axis of symmetry parallel to the Z axis. For example, the fourth solar cell string 30d and the fifth solar cell string 30e have a substantially two-fold rotational symmetry relationship in which they have substantially the same configuration when rotated 180 degrees around an axis of symmetry parallel to the Z axis. For example, the fifth solar cell string 30e and the sixth solar cell string 30f have a substantially two-fold rotational symmetry relationship in which they have approximately the same configuration when rotated 180 degrees around an axis of symmetry parallel to the Z axis.

[0162] 20 , each of the multiple solar cell strings 30 includes eight solar cell strings 31 arranged along the +Y direction as a first direction as two or more solar cell strings 31. More specifically, the eight solar cell strings 31 include a first solar cell string 31a, a second solar cell string 31b, a third solar cell string 31c, a fourth solar cell string 31d, a fifth solar cell string 31e, a sixth solar cell string 31f, a seventh solar cell string 31g, and an eighth solar cell string 31h. The first solar cell string 31a, the second solar cell string 31b, the third solar cell string 31c, the fourth solar cell string 31d, the fifth solar cell string 31e, the sixth solar cell string 31f, the seventh solar cell string 31g, and the eighth solar cell string 31h are arranged in the +Y direction as a first direction in this order.

[0163] 20 , in each of the plurality of photovoltaic strings 30, the interval between two adjacent photovoltaic cells 31 is the same first interval I1 for all pairs of two adjacent photovoltaic cells 31. In other words, in each photovoltaic string 30, the interval between two adjacent photovoltaic cells 31 is the same first interval I1 for each of seven pairs of two adjacent photovoltaic cells 31.

[0164] 20 , in each of the first solar cell string 30 a, the third solar cell string 30 c, and the fifth solar cell string 30 e, for example, as shown in Fig. 16 , the third wiring member 32 connects the busbar portion 311 b on the first cell surface F1 side of one solar cell 31 to the second output portion 312 b on the second cell surface F2 side of another solar cell 31 that is adjacent to the one solar cell 31 in the +Y direction, which is the first direction. Also, in each of the second solar cell string 30 b, the fourth solar cell string 30 d, the sixth solar cell string 30 f, and the seventh solar cell string 30 g, for example, the third wiring member 32 connects the second output portion 312 b on the second cell surface F2 side of one solar cell 31 to the busbar portion 311 b on the first cell surface F1 side of another solar cell 31 that is adjacent to the one solar cell 31 in the +Y direction, which is the first direction.

[0165] 20 , each of the plurality of third wiring members 32 electrically connects the first solar cell 31 a and the second solar cell 31 b. For example, each of the plurality of third wiring members 32 includes a portion bonded to the first solar cell 31 a and a portion bonded to the second solar cell 31 b. Each of the plurality of third wiring members 32 electrically connects the second solar cell 31 b and the third solar cell 31 c. For example, each of the plurality of third wiring members 32 includes a portion bonded to the second solar cell 31 b and a portion bonded to the third solar cell 31 c. Each of the plurality of third wiring members 32 electrically connects the third solar cell 31 c and the fourth solar cell 31 d. For example, each of the plurality of third wiring members 32 includes a portion bonded to the third solar cell 31c and a portion bonded to the fourth solar cell 31d. Each of the plurality of third wiring members 32 is in a state in which the fourth solar cell 31d and the fifth solar cell 31e are electrically connected. For example, each of the plurality of third wiring members 32 includes a portion bonded to the fourth solar cell 31d and a portion bonded to the fifth solar cell 31e. Each of the plurality of third wiring members 32 is in a state in which the fifth solar cell 31e and the sixth solar cell 31f are electrically connected. For example, each of the plurality of third wiring members 32 includes a portion bonded to the fifth solar cell 31e and a portion bonded to the sixth solar cell 31f. Each of the plurality of third wiring members 32 is in a state in which the sixth solar cell 31f and the seventh solar cell 31g are electrically connected. For example, each of the plurality of third wiring members 32 includes a portion joined to the sixth solar cell 31 f and a portion joined to the seventh solar cell 31 g. Each of the plurality of third wiring members 32 is in a state in which the seventh solar cell 31 g and the eighth solar cell 31 h are electrically connected. For example, each of the plurality of third wiring members 32 includes a portion joined to the seventh solar cell 31 g and a portion joined to the eighth solar cell 31 h.

[0166] 20 , for the first solar cell string 30a, the second solar cell string 30b, the third solar cell string 30c, the fourth solar cell string 30d, the fifth solar cell string 30e, and the sixth solar cell string 30f, the interval between adjacent two solar cell strings 30 is the same second interval I2 for all pairs of adjacent solar cell strings 30. In other words, for each of the five pairs of adjacent solar cell strings 30, the interval between adjacent two solar cell strings 30 is the same second interval I2. The interval between the sixth solar cell string 30f and the seventh solar cell string 30g is a third interval I3. The third interval I3 may be set to, for example, 18 mm or approximately 18 mm in order to position a jumper wiring portion 33b (described later) of the first wiring member 33.

[0167] In one specific example of FIG. 20 , the plurality of first wiring members 33 are six first wiring members 33 .

[0168] Here, the first first wiring member 33 electrically connects the first solar cell string 30a and the second solar cell string 30b. For example, the first first wiring member 33 is connected to the plurality of second output portions 312b on the second cell surface F2 side of the first solar cell 31a in the first solar cell string 30a by the plurality of third wiring members 32. For example, the first first wiring member 33 is connected to the plurality of busbar portions 311b on the first cell surface F1 side of the first solar cell 31a in the second solar cell string 30b by the plurality of third wiring members 32.

[0169] The second first wiring member 33 electrically connects the second solar cell string 30b and the third solar cell string 30c. For example, the second output portions 312b on the second cell surface F2 side of the eighth solar cell 31h in the second solar cell string 30b are connected to the second first wiring member 33 by the plurality of third wiring members 32. For example, the second first wiring member 33 is connected to the busbar portions 311b on the first cell surface F1 side of the eighth solar cell 31h in the third solar cell string 30c by the plurality of third wiring members 32.

[0170] The third first wiring member 33 electrically connects the third solar cell string 30c and the fourth solar cell string 30d. For example, the third first wiring member 33 is connected to the plurality of second output portions 312b on the second cell surface F2 side of the first solar cell 31a in the third solar cell string 30c by the plurality of third wiring members 32. For example, the third first wiring member 33 is connected to the plurality of busbar portions 311b on the first cell surface F1 side of the first solar cell 31a in the fourth solar cell string 30d by the plurality of third wiring members 32.

[0171] The fourth first wiring member 33 electrically connects the fourth solar cell string 30d and the fifth solar cell string 30e. For example, the fourth first wiring member 33 is connected to the plurality of second output portions 312b on the second cell surface F2 side of the eighth solar cell 31h in the fourth solar cell string 30d by the plurality of third wiring members 32. For example, the fourth first wiring member 33 is connected to the plurality of busbar portions 311b on the first cell surface F1 side of the eighth solar cell 31h in the fifth solar cell string 30e by the plurality of third wiring members 32.

[0172] The fifth first wiring member 33 electrically connects the fifth solar cell string 30e and the sixth solar cell string 30f. For example, the fifth first wiring member 33 is connected to the plurality of second output portions 312b on the second cell surface F2 side of the first solar cell 31a in the fifth solar cell string 30e by the plurality of third wiring members 32. For example, the fifth first wiring member 33 is connected to the plurality of busbar portions 311b on the first cell surface F1 side of the first solar cell 31a in the sixth solar cell string 30f by the plurality of third wiring members 32.

[0173] The sixth first wiring member 33 electrically connects the sixth solar cell string 30f and the seventh solar cell string 30g. For example, the sixth first wiring member 33 is connected to the plurality of second output portions 312b on the second cell surface F2 side of the eighth solar cell 31h in the sixth solar cell string 30f by the plurality of third wiring members 32. For example, the sixth first wiring member 33 is connected to the plurality of busbar portions 311b on the first cell surface F1 side of the first solar cell 31a in the seventh solar cell string 30g by the plurality of third wiring members 32. The sixth first wiring member 33 includes a jumper wiring portion 33b located between the sixth solar cell string 30f and the seventh solar cell string 30g. For example, when the number of solar cell strings 30 in the solar cell unit 3 is odd, one of the plurality of first wiring members 33 may include the jumper wiring portion 33b.

[0174] As a result, the first solar cell string 30a, the second solar cell string 30b, the third solar cell string 30c, the fourth solar cell string 30d, the fifth solar cell string 30e, the sixth solar cell string 30f, and the seventh solar cell string 30g are electrically connected in series in the order listed.

[0175] Here, for example, assume that the solar cell unit 3 is viewed from the first surface 1f side in a planar view. In this case, the distance between the first first wiring member 33 and the two first solar cells 31a located furthest in the -Y direction in the first solar cell string 30a and the second solar cell string 30b is set to distance d1. The distance between the second first wiring member 33 and the two eighth solar cells 31h located furthest in the +Y direction in the second solar cell string 30b and the third solar cell string 30c is set to distance d1. The distance between the third first wiring member 33 and the two first solar cells 31a located furthest in the -Y direction in the third solar cell string 30c and the fourth solar cell string 30d is set to distance d1. The distance between the fourth first wiring member 33 and the two eighth solar cells 31h located furthest in the +Y direction in the fourth solar cell string 30d and the fifth solar cell string 30e is set to distance d1. The distance between the fifth first wiring member 33 and the two first solar cells 31a located furthest in the -Y direction in the fifth solar cell string 30e and the sixth solar cell string 30f is set to distance d1. The distance between the sixth first wiring member 33 and the eighth solar cell 31h located furthest in the +Y direction in the sixth solar cell string 30f and the first solar cell 31a located furthest in the -Y direction in the seventh solar cell string 30g is set to distance d1.

[0176] 20 , the first second wiring member 34 is electrically connected to the seventh solar cell string 30g, and the second second wiring member 34 is electrically connected to the first solar cell string 30a. For example, the first second wiring member 34 is connected to the second output portions 312b on the second cell surface F2 side of the eighth solar cell 31h in the seventh solar cell string 30g by the third wiring members 32. For example, the second second wiring member 34 is connected to the busbar portions 311b on the first cell surface F1 side of the eighth solar cell 31h in the first solar cell string 30a by the third wiring members 32.

[0177] Here, for example, a case is assumed in which the solar cell unit 3 is viewed from the first surface 1f side. In this case, the distance between the first second wiring member 34 and the eighth solar cell 31h located furthest in the +Y direction in the seventh solar cell string 30g is set to distance d1. Furthermore, for example, the distance between the second second wiring member 34 and the eighth solar cell 31h located furthest in the +Y direction in the first solar cell string 30a is also set to distance d1.

[0178] 21 , for example, the first portion of the first second wiring member 34 may be connected to a first terminal box J1 (first terminal box J11) located on the back surface 10b of the power generator 10. For example, the second portion of the second second wiring member 34 may be connected to a second terminal box J1 (second terminal box J12) located on the back surface 10b of the power generator 10. Furthermore, for example, the second first wiring member 33 and the fourth first wiring member 33 may be connected via a third terminal box J1 (third terminal box J13) located on the back surface 10b of the power generator 10. In this case, the third terminal box J13 may have a bypass diode. Here, the second first wiring member 33 and the fourth first wiring member 33 may be connected via a bypass diode. Furthermore, for example, the fourth first wiring member 33 and the sixth first wiring member 33 may be connected via a fourth terminal box J1 (fourth terminal box J14) located on the rear surface 10b side of the power generator 10. In this case, the fourth terminal box J14 may have a bypass diode. Here, the fourth first wiring member 33 and the sixth first wiring member 33 may be connected via a bypass diode. Also, for example, the second second wiring member 34 and the second first wiring member 33 may be connected via a second terminal box J12. In this case, the second terminal box J12 may have a bypass diode. Here, the second second wiring member 34 and the second first wiring member 33 may be connected via a bypass diode.

[0179] <1-3. Method for setting upper and lower limits of first length and second length> Here, an example of a method for setting the upper limit of the first length L1, 1377 mm, the lower limit of the first length L1, 1316 mm, the upper limit of the second length L2, 804 mm, and the lower limit of the second length L2, 778 mm, will be described.

[0180] 3 and the second power generating body 10B in Fig. 18, the upper limit L1ma1 (unit: mm) of the first length L1 that satisfies the second condition above is calculated by the following formula (1) using the third length L3. Here, the number of photovoltaic cell strings 30 is N1s, and the upper limit of the second interval I2 is 4 mm.

[0181] L1ma1=(L3×N1s)+4×(N1s-1)+(L3 / 2)...(1).

[0182] Specifically, for a specific example of the first power generating body 10A in Fig. 3, the number N1s of the multiple solar cell strings 30 is 6, and the third length L3 is 210 mm, so the upper limit L1ma1 of the first length L1 is calculated to be 1385 mm. For a specific example of the second power generating body 10B in Fig. 18, the number N1s of the multiple solar cell strings 30 is 8, and the third length L3 is 158.75 mm, so the upper limit L1ma1 of the first length L1 is calculated to be 1377.375 mm.

[0183] 20, the upper limit L1ma2 (unit: mm) of the first length L1 that satisfies the second condition above is calculated by the following formula (2) using the number N1s of the solar cell strings 30 and the third length L3. Here, the upper limit of the second interval I2 is set to 4 mm, and the third interval I3 is set to 18 mm.

[0184] L1ma2=(L3×N1s)+4×(N1s-2)+18+(L3 / 2)...(2).

[0185] Specifically, for one specific example of the third power generation body 10C in Figure 20, the number N1s of the solar cell strings 30 is 7, and the third length L3 is 182 mm, so the upper limit L1ma2 of the first length L1 is calculated to be 1403 mm.

[0186] Therefore, the upper limit of the first length L1 can be set to 1377 mm, which is the smallest of the upper limit L1ma1 of the first length L1 for a specific example of the first power generating body 10A in Figure 3, 1377.4 mm, which is the upper limit L1ma1 of the first length L1 for a specific example of the second power generating body 10B in Figure 18, and 1403 mm, which is the upper limit L1ma2 of the first length L1 for a specific example of the third power generating body 10C in Figure 20.

[0187] <<Lower Limit of First Length>> For a specific example of the first power generating body 10A in Fig. 3 and a specific example of the second power generating body 10B in Fig. 18, the lower limit L1mi1 (unit: mm) of the first length L1 that satisfies the second condition above is calculated by the following formula (3) using the number N1s of the multiple solar cell strings 30 and the third length L3. Here, the lower limit of the second interval I2 is set to 1.5 mm, and the lower limits of each of the third distance D3 and the fourth distance D4 are set to 8 mm.

[0188] L1mi1=(L3×N1s)+1.5×(N1s−1)+8×2 (3).

[0189] Specifically, for a specific example of the first power generating body 10A in Fig. 3, the number N1s of the multiple solar cell strings 30 is 6, and the third length L3 is 210 mm, so the lower limit L1mi1 of the first length L1 is calculated to be 1283.5 mm. For a specific example of the second power generating body 10B in Fig. 18, the number N1s of the multiple solar cell strings 30 is 8, and the third length L3 is 158.75 mm, so the lower limit L1mi1 of the first length L1 is calculated to be 1296.5 mm.

[0190] 20 , the lower limit L1mi2 (unit: mm) of the first length L1 that satisfies the second condition above is calculated by the following formula (4) using the number N1s of the solar cell strings 30 and the third length L3. Here, the lower limit of the second interval I2 is set to 1.5 mm, the third interval I3 is set to 18 mm, and the lower limits of the third distance D3 and the fourth distance D4 are each set to 8 mm.

[0191] L1mi2=(L3×N1s)+1.5×(N1s−2)+18+8×2 (4).

[0192] Specifically, for one specific example of the third power generation body 10C in Figure 20, the number N1s of the solar cell strings 30 is 7, and the third length L3 is 182 mm, so the lower limit L1mi2 of the first length L1 is calculated to be 1315.5 mm.

[0193] Therefore, the lower limit of the first length L1 can be set to 1316 mm, which is greater than or equal to the largest length of the lower limit L1mi1 of the first length L1 for a specific example of the first power generating body 10A in Figure 3, which is 1283.5 mm, the lower limit L1mi1 of the first length L1 for a specific example of the second power generating body 10B in Figure 18, which is 1296.5 mm, and the lower limit L1mi2 of the first length L1 for a specific example of the third power generating body 10C in Figure 20.

[0194] 3 , a specific example of the second power generating body 10B in FIG. 18 , and a specific example of the third power generating body 10C in FIG. 20 , the upper limit L2ma (unit: mm) of the second length L2 that satisfies the first condition above is calculated by the following equation (5) using the fourth length L4. Here, the number of two or more solar cells 31 in each of the multiple solar cell strings 30 is N2s, the upper limit of the first interval I1 is 4 mm, the width w1 of each of the first wiring member 33 and the second wiring member 34 is 6 mm, and the interval d1 between each of the first wiring member 33 and the second wiring member 34 and the solar cell 31 is 3 mm.

[0195] L2ma=(L4×N2s)+4×(N2s−1)+(6+3)×2+(L4 / 2) (5).

[0196] Specifically, for a specific example of the first power generating body 10A in Fig. 3, the number N2s of two or more solar cells 31 is 7, and the fourth length L4 is 105 (= 210 / 2) mm, so the upper limit L2ma of the second length L2 is calculated to be 829.5 mm. For a specific example of the second power generating body 10B in Fig. 18, the number N2s of two or more solar cells 31 is 9, and the fourth length L4 is 79.375 (= 158.75 / 2) mm, so the upper limit L2ma of the second length L2 is calculated to be 804.0625 mm. For a specific example of the third power generating body 10C in Fig. 20, the number N2s of two or more solar cells 31 is 8, and the fourth length L4 is 91 (= 182 / 2) mm, so the upper limit L2ma of the second length L2 is calculated to be 819.5 mm.

[0197] Therefore, the upper limit of the second length L2 can be set to 804 mm, which is the smallest of the upper limit L2ma of the second length L2 for a specific example of the first power generating body 10A in Figure 3, which is 829.5 mm, the upper limit L2ma of the second length L2 for a specific example of the second power generating body 10B in Figure 18, which is 804.0625 mm, and the upper limit L2ma of the second length L2 for a specific example of the third power generating body 10C in Figure 20, which is 819.5 mm.

[0198] <<Lower Limit of Second Length>> For each of the specific example of the first power generating body 10A in Fig. 3 , the specific example of the second power generating body 10B in Fig. 18 , and the specific example of the third power generating body 10C in Fig. 20 , the lower limit L2mi (unit: mm) of the second length L2 that satisfies the first condition above is calculated by the following formula (6) using the number N2s of two or more solar cells 31 in each of the multiple solar cell strings 30 and the fourth length L4. Here, the lower limit of the first interval I1 is set to 1.5 mm, the width w1 of each of the first wiring member 33 and the second wiring member 34 is set to 6 mm, the distance d1 between each of the first wiring member 33 and the second wiring member 34 and the solar cell 31 is set to 3 mm, and the lower limit of each of the first distance D1 and the second distance D2 is set to 8 mm.

[0199] L2mi=(L4×N2s)+1.5×(N2s−1)+(6+3)×2+8×2 (6).

[0200] Specifically, for a specific example of the first power generating body 10A in Fig. 3, the number N2s of two or more solar cells 31 is 7, and the fourth length L4 is 105 (= 210 / 2) mm, so the lower limit L2mi of the second length L2 is calculated to be 778 mm. For a specific example of the second power generating body 10B in Fig. 18, the number N2s of two or more solar cells 31 is 9, and the fourth length L4 is 79.375 (= 158.75 / 2) mm, so the lower limit L2mi of the second length L2 is calculated to be 760.375 mm. For a specific example of the third power generating body 10C in Fig. 20, the number N2s of two or more solar cells 31 is 8, and the fourth length L4 is 91 (= 182 / 2) mm, so the lower limit L2mi of the second length L2 is calculated to be 772.5 mm.

[0201] Therefore, the lower limit of the second length L2 can be set to 778 mm, which is greater than or equal to the largest length among the lower limit L2mi of the second length L2 for a specific example of the first power generating body 10A in Figure 3, the lower limit L2mi of the second length L2 for a specific example of the second power generating body 10B in Figure 18, which is 760.375 mm, and the lower limit L2mi of the second length L2 for a specific example of the third power generating body 10C in Figure 20, which is 772.5 mm.

[0202] <<Specific Examples of First Length and Second Length>> Here, a configuration is considered in which the first length L1 is 1,362 mm and the second length L2 is 791 mm. It is also considered that each of the first interval I1 and the second interval I2 is 2.5 mm, which is between the upper limit of 4 mm and the lower limit of 1.5 mm.

[0203] In this case, for example, in one specific example of the first power generating body 10A in Figure 3, a configuration can be realized in which the first distance D1 and the second distance D2 are each 11.5 mm, and the third distance D3 and the fourth distance D4 are each 44.75 mm.

[0204] For example, in one specific example of the second power generating body 10B in FIG. 18, a configuration can be realized in which the first distance D1 and the second distance D2 are each 19.31 mm, and the third distance D3 and the fourth distance D4 are each 37.25 mm.

[0205] For example, in one specific example of the third power generating body 10C in FIG. 20, a configuration can be realized in which the first distance D1 and the second distance D2 are each 13.75 mm, and the third distance D3 and the fourth distance D4 are each 28.75 mm.

[0206] 1-4. Effects of the Solar Cell Module The arrangement of the solar cell units 31 in the power generating unit 10 according to the first embodiment is the first arrangement described above. As described above, the first length L1 is set to 1,316 mm to 1,377 mm, and the second length L2 is set to 778 mm to 804 mm.

[0207] In this case, as described above, even if any one of the first type solar cell 31A, the second type solar cell 31B, and the third type solar cell 31C, which are different in size from one another, is used as each of the plurality of solar cells 31, the above-described first condition and second condition can be satisfied in the power generating body 10 having the same size when the first surface 1f is viewed in a plan view. Therefore, when the first surface 1f is viewed in a plan view, the area occupied by the plurality of solar cells 31 in the area of ​​the power generating body 10 increases, and the conversion efficiency of the solar cell module 100 can be improved. In other words, power generating bodies 10 having the same size when the first surface 1f is viewed in a plan view can be manufactured while ensuring the ratio of the area occupied by the plurality of solar cells 31 in the power generating body 10 when the first surface 1f is viewed in a plan view. Therefore, even if any one of multiple types of solar cells having different sizes is used as each of the multiple solar cell units 31 in the power generating body 10, if the multiple solar cell units 31 are arranged in the above-mentioned first arrangement, a power generating body 10 and a solar cell module 100 having the same size outer shape can be manufactured.

[0208] Regarding the size standards of solar cell 31, mainstream size standards change over time, and production of solar cell 31 that does not meet mainstream size standards may be discontinued. In contrast, even if any one type of solar cell among multiple types of solar cell having different sizes is adopted as the multiple solar cell 31, as long as the power generating body 10 and the solar cell module 100 have the same external dimensions, the solar cell module 100 can be easily fixed to an installation object, such as the roof or exterior wall of a building, using a common mounting or the like. As a result, construction errors when fixing the solar cell module 100 to an installation object can be reduced. From another perspective, the number of types of power generating body 10 and solar cell module 100 that can be fixed to an installation object using the same mounting or the like can be increased. This can improve the productivity of the mounting.

[0209] Furthermore, as described above, even if any one type of solar cell among multiple types of solar cells having different sizes is used as each of the multiple solar cells 31 in the power generating body 10, when the multiple solar cells 31 are arranged in the first arrangement described above, the power generating body 10 and the solar cell module 100 have the same external dimensions. As a result, even if any one type of solar cell among multiple types of solar cells having different sizes is used as each of the multiple solar cells 31 in the power generating body 10, the power generating body 10 and the solar cell module 100 can be manufactured using the first protective member 1 and the second protective member 2, etc., having the same size. As a result, the conversion efficiency of the power generating body 10 and the solar cell module 100 can be ensured, while the productivity of the power generating body 10 and the solar cell module 100 can be increased. Furthermore, common design drawings for installing a mounting or the like on an installation target object can be used for a greater variety of power generating bodies 10 and solar cell modules 100. This reduces the number of steps required to install a solar power generation system on a building as an installation target object. Furthermore, construction companies such as home builders that install power generating units 10 and solar cell modules 100 on the roof or exterior wall of a building as an installation target can reduce the development man-hours required for the construction and allocation of multiple solar cell modules 100 to be installed on the roof or exterior wall of the building. This development man-hours includes, for example, the amount of work required to perform various tasks such as creating design drawings, design review, and quality evaluation of load durability, corrosion resistance, etc. Furthermore, some of the solar cell modules 100 that are arranged and fixed in a limited space such as the roof or exterior wall of a building can be easily replaced.

[0210] 22 to 27, an example of a method for manufacturing a solar cell module 100 including a power generating body 10 will be described. The solar cell module 100 can be manufactured, for example, by attaching a frame FL1 along the outer periphery of the power generating body 10. Therefore, the following description will focus on an example of a method for manufacturing the power generating body 10, which constitutes a part of the method for manufacturing the solar cell module 100.

[0211] 22, the power generating body 10 can be manufactured by performing step S1 (also referred to as step 1), step S2 (also referred to as step 2), and step S3 (also referred to as step 3) in this order. In other words, the manufacturing method for the solar cell module 100 and the manufacturing method for the power generating body 10 include, for example, the above-mentioned step 1, step 2, and step 3.

[0212] <1-5-1. Configuration of the power generating unit to be manufactured> Here, the power generating unit 10, which is the object to be manufactured (also referred to as the manufacturing target), has, for example, at least the following configuration (also referred to as configuration 1) of the configurations of the power generating unit 10 described above.

[0213] <<Configuration 1>> Configuration 1 includes the following [Configuration 1A] to [Configuration 1M].

[0214] [Configuration 1A] The power generating unit 10 has a first protective member 1, a second protective member 2, a solar cell section 3, and a sealing material 4.

[0215] [Configuration 1B] The first protective member 1 is a plate-like or sheet-like member having translucency. The first protective member 1 has a first surface 1f and a second surface 1s. The second surface 1s is the surface of the first protective member 1 opposite to the first surface 1f.

[0216] [Configuration 1C] The second protective member 2 is a flat or sheet-like member. The second protective member 2 has a third surface 2f and a fourth surface 2s. The third surface 2f faces the second surface 1s. The fourth surface 2s is the surface of the second protective member 2 opposite the third surface 2f.

[0217] [Configuration 1D] The solar cell section 3 is located in the gap between the first protective member 1 and the second protective member 2. The solar cell section 3 includes a plurality of solar cells 31. The plurality of solar cells 31 are located in a matrix along the second surface 1s of the first protective member 1.

[0218] [Configuration 1E] The sealing material 4 is positioned in the gap between the first protective member 1 and the second protective member 2 so as to seal the solar cell section 3 .

[0219] [Configuration 1F] When the first surface 1f is viewed in a plan view, the power generator 10 has a rectangular shape having a first long side 1Ls and a second long side 2Ls, and a first short side 1Ss and a second short side 2Ss. The first long side 1Ls and the second long side 2Ls face each other in the +Y direction as a first direction. The first short side 1Ss and the second short side 2Ss face each other in the +X direction as a second direction. The first long side 1Ls and the second long side 2Ls are each located along the +X direction as a second direction. When the first surface 1f is viewed in a plan view, the power generator 10 has a first length L1 along the +X direction as a second direction. The first short side 1Ss and the second short side 2Ss are each located along the +Y direction as a first direction. When the first surface 1f is viewed in a plan view, the power generator 10 has a second length L2 along the +Y direction as a first direction.

[0220] [Configuration 1G] When the plurality of solar cells 31 are viewed in plan from the first surface 1f side, each of the plurality of solar cells 31 has a rectangular shape having a third long side 3Ls and a fourth long side 4Ls and a third short side 3Ss and a fourth short side 4Ss. When the plurality of solar cells 31 are viewed in plan from the first surface 1f side, each of the plurality of solar cells 31 has a third length L3 in the direction along each of the third long side 3Ls and the fourth long side 4Ls, and a fourth length L4 in the direction along each of the third short side 3Ss and the fourth short side 4Ss.

[0221] [Configuration 1H] The solar cell section 3 includes a plurality of solar cell strings 30, a plurality of first wiring members 33, and a plurality of second wiring members 34.

[0222] [Configuration 1I] Each of the multiple solar cell strings 30 has two or more solar cell cells 31 and multiple third wiring members 32. In each of the multiple solar cell strings 30, the two or more solar cell cells 31 are aligned along a direction (third direction) along each of the third short side 3Ss and the fourth short side 4Ss. In the first embodiment, the third direction may be, for example, the +Y direction as the first direction. In each of the multiple solar cell strings 30, the multiple third wiring members 32 electrically connect the two or more solar cell cells 31 in series. Here, in each of the multiple solar cell strings 30, the multiple third wiring members 32 electrically connect each pair of adjacent solar cell cells 31 among the two or more solar cell cells 31.

[0223] [Configuration 1J] Each of the plurality of first wiring members 33 electrically connects two adjacent solar cell strings 30 among the plurality of solar cell strings 30 .

[0224] [Configuration 1K] The multiple second wiring members 34 include a first second wiring member 34 and a second second wiring member 34. The first second wiring member 34 is electrically connected to the solar cell string 30, among the multiple solar cell strings 30, that is located at the end in the direction in which the multiple solar cell strings 30 are lined up (the fourth direction). The second second wiring member 34 is electrically connected to the solar cell string 30, among the multiple solar cell strings 30, that is located at the end in the direction opposite to the fourth direction. In the first embodiment, the fourth direction may be, for example, the +X direction as the second direction.

[0225] [Configuration 1L] It is assumed that the plurality of solar cell strings 30 are viewed in plan from the first surface 1f side. In this case, in each of the plurality of solar cell strings 30, each of the plurality of third wiring members 32 is positioned along the third direction. Furthermore, in each of the plurality of solar cell strings 30, the distance in the third direction between two adjacent solar cell cells 31 among two or more solar cell cells 31 is the first distance I1.

[0226] [Configuration 1M] Assume the case where the first surface 1f is viewed in a planar view. In this case, the distance between the first long side 1Ls and the solar cell unit 3 in the +Y direction as the first direction is the first distance D1. The distance between the solar cell unit 3 and the second long side 2Ls in the +Y direction as the first direction is the second distance D2. The distance between the first short side 1Ss and the solar cell unit 3 in the +X direction as the second direction is the third distance D3. The distance between the solar cell unit 3 and the second short side 2Ss in the +X direction as the second direction is the fourth distance D4.

[0227] <1-5-2. Example of Step S1 (First Step)> In step S1, a first length L1 and a second length L2 are set.

[0228] In the process of step S1, even if any one type of solar cell among the plurality of types of solar cells is used as each of the plurality of solar cells 31 in the power generating body 10, when the arrangement of the plurality of solar cells 31 is the first arrangement in the state of the power generating body 10, the first length L1 and the second length L2 that satisfy the first condition and the second condition are set. Here, the plurality of types of solar cells include the first type of solar cell 31A, the second type of solar cell 31B, and the third type of solar cell 31C.

[0229] Here, an example of a method for setting the first length L1 and the second length L2 will be described.

[0230] For example, it is assumed that the multiple types of solar cells are a first type of solar cell 31A, a second type of solar cell 31B, and a third type of solar cell 31C. In this case, it is further assumed that the first type of solar cell 31A is used as each of the multiple solar cells 31 in the power generation body 10, that the second type of solar cell 31B is used as each of the multiple solar cells 31 in the power generation body 10, and that the third type of solar cell 31C is used as each of the multiple solar cells 31 in the power generation body 10.

[0231] First, for example, in the case where a first type of solar cell 31A is used as each of the plurality of solar cells 31 in the power generating body 10, the arrangement of the plurality of solar cells 31 is set to the first arrangement, and a range (also referred to as a first range) of the first length L1 and the second length L2 that satisfies each of the first and second conditions is calculated while changing the number of the plurality of solar cell strings 30, the number of two or more solar cells 31 in each of the plurality of solar cell strings 30, the first interval I1, the second interval I2, etc. The first range may be, for example, the upper and lower limits of the first length L1 and the upper and lower limits of the second length L2.

[0232] For example, in the case where the second type of solar cell 31B is used as each of the plurality of solar cells 31 in the power generating body 10, the arrangement of the plurality of solar cells 31 is set to the first arrangement, and the number of the plurality of solar cell strings 30, the number of two or more solar cells 31 in each of the plurality of solar cell strings 30, the first interval I1, the second interval I2, etc. are changed, and a range (also referred to as a second range) of the first length L1 and the second length L2 that satisfies each of the first and second conditions is calculated. The second range may be, for example, the upper and lower limits of the first length L1 and the upper and lower limits of the second length L2.

[0233] For example, in the case where the third type of solar cell 31C is used as each of the plurality of solar cells 31 in the power generating body 10, the arrangement of the plurality of solar cells 31 is set to the first arrangement, and the number of the plurality of solar cell strings 30, the number of two or more solar cells 31 in each of the plurality of solar cell strings 30, the first interval I1, the second interval I2, etc. are changed, and a range (also referred to as a third range) of the first length L1 and the second length L2 that satisfies each of the first and second conditions is calculated. The third range may be, for example, the upper and lower limits of the first length L1 and the upper and lower limits of the second length L2.

[0234] Next, for example, upper and lower limits of the first length L1 and the second length L2 are set for a range common to the first, second, and third ranges. Then, for example, the first length L1 and the second length L2 are set so as to satisfy the conditions of the upper and lower limits of the first length L1 and the second length L2 set here. For example, as exemplified in the method for setting the upper and lower limits of the first length L1 and the second length L2, a case is assumed in which an upper limit of 1377 mm for the first length L1, a lower limit of 1316 mm for the first length L1, an upper limit of 804 mm for the second length L2, and a lower limit of 778 mm for the second length L2 are calculated. In this case, the first length L1 may be between 1316 mm and 1377 mm, and the second length L2 may be between 778 mm and 804 mm. More specifically, as shown in the specific example of the first length L1 and the second length L2 described above, the first length L1 can be set to 1362 mm, and the second length L2 can be set to 791 mm.

[0235] Here, even if any one type of solar cell among the multiple types of solar cells is used as each of the multiple solar cell cells 31 in the power generation body 10, if the arrangement of the multiple solar cell cells 31 in the power generation body 10 is in the above-mentioned first arrangement, the first length L1 is not limited to 1316 mm to 1377 mm, and the second length L2 is not limited to 778 mm to 804 mm, as long as the above-mentioned first condition and the above-mentioned second condition can be satisfied.

[0236] <1-5-3. Example of Step S2 (Second Step)> In step S2, a plurality of solar battery cells 31 are prepared.

[0237] In the process of step S2, any one type of solar cell among the plurality of types of solar cell is prepared as each of the plurality of solar cell 31. The plurality of types of solar cell include a first type of solar cell 31A, a second type of solar cell 31B, and a third type of solar cell 31C.

[0238] For example, it is assumed that in the process of step S2, a first-type solar cell 31A is prepared as each of the multiple solar cells 31. In this case, for example, each of the one or more first-type mother substrates 31PA described above may be divided in a direction along one side of the first-standard light-receiving surface F1PA of the first-type mother substrate 31PA to prepare the multiple first-type solar cells 31A. The one or more first-type mother substrates 31PA may be one or more first-standard solar cells each having the first-standard light-receiving surface F1PA. The one side of the first-standard light-receiving surface F1PA may be any one of a first pair of first sides and a second pair of second sides of the first-standard light-receiving surface F1PA.

[0239] For example, it is assumed that in step S2, a second-type solar cell 31B is prepared as each of the plurality of solar cells 31. In this case, for example, each of the one or more second-type mother substrates 31PB described above may be divided in a direction along one side of the second-standard light-receiving surface F1PB of the second-type mother substrate 31PB, thereby preparing the plurality of second-type solar cells 31B. The one or more second-type mother substrates 31PB may be one or more second-standard solar cells each having the second-standard light-receiving surface F1PB. The one side of the second-standard light-receiving surface F1PB may be any one of a first pair of first sides and a second pair of second sides of the second-standard light-receiving surface F1PB.

[0240] For example, it is assumed that in step S2, a third-type solar cell 31C is prepared as each of the plurality of solar cells 31. In this case, for example, each of the one or more third-type mother substrates 31PC described above may be divided in a direction along one side of the third-standard light-receiving surface F1PC of the third-type mother substrate 31PC, thereby preparing the plurality of third-type solar cells 31C. The one or more third-type mother substrates 31PC may be one or more third-standard solar cells, each having a third-standard light-receiving surface F1PC. The one side of the third-standard light-receiving surface F1PC may be any one of a first pair of first sides and a second pair of second sides of the third-standard light-receiving surface F1PC.

[0241] In this way, if a parent substrate 31P having a standard size can be divided to prepare multiple solar cell cells 31, each having a rectangular first cell surface F1 and a second cell surface F2 that are applicable to the power generation body 10, then multiple solar cell cells 31 can be prepared efficiently.

[0242] More specifically, for example, in the process of step S2, it is assumed that a first-type solar cell 31A is prepared as each of the multiple solar cells 31. In this case, for example, the multiple first-type solar cells 31A may be prepared by dividing each of the one or more first-type mother substrates 31PA described above into two in a direction along one side of the first-standard light-receiving surface F1PA serving as the light-receiving surface of the first-type mother substrate 31PA. The one or more first-type mother substrates 31PA may be one or more first-standard solar cells each having the first-standard light-receiving surface F1PA. Here, for example, the multiple first-type solar cells 31A may be prepared by dividing each of the one or more first-type mother substrates 31PA into equal halves in a direction along one side of the first-standard light-receiving surface F1PA.

[0243] For example, it is assumed that in the process of step S2, a second-type solar cell 31B is prepared as each of the plurality of solar cells 31. In this case, for example, the plurality of second-type solar cells 31B may be prepared by dividing each of the one or more second-type mother substrates 31PB described above into two in a direction along one side of the second-standard light-receiving surface F1PB serving as the light-receiving surface of the second-type mother substrate 31PB. The one or more second-type mother substrates 31PB may be one or more second-standard solar cells each having the second-standard light-receiving surface F1PB. Here, for example, the plurality of second-type solar cells 31B may be prepared by dividing each of the one or more second-type mother substrates 31PB into equal halves in a direction along one side of the second-standard light-receiving surface F1PB.

[0244] For example, it is assumed that in step S2, a third-type solar cell 31C is prepared as each of the plurality of solar cells 31. In this case, for example, each of the one or more third-type mother substrates 31PC described above may be divided into two in a direction along one side of the third-standard light-receiving surface F1PC serving as the light-receiving surface of the third-type mother substrate 31PC, thereby preparing the plurality of third-type solar cells 31C. The one or more third-type mother substrates 31PC may be one or more third-standard solar cells, each having the third-standard light-receiving surface F1PC. Here, for example, each of the one or more third-type mother substrates 31PC may be divided into two equal parts in a direction along one side of the third-standard light-receiving surface F1PC, thereby preparing the plurality of third-type solar cells 31C.

[0245] In this way, by dividing the mother substrate 31P of the solar cell into two, it is possible to prepare a plurality of solar cells 31 each having a rectangular first cell surface F1 and a rectangular second cell surface F2 that are applicable to the power generation body 10. As a result, it is possible to efficiently prepare a plurality of solar cells 31.

[0246] <1-5-4. Example of Step S3 (Third Step)> In step S3, the power generating body 10 is fabricated.

[0247] In step S3, the power generating body 10 is fabricated using the first protective member 1 and the second protective member 2 according to the first length L1 and the second length L2 set in step S1, and the plurality of solar cells 31 prepared in step S2. In step S3, for example, as shown in each of the examples in Figures 3, 18, and 20, when the arrangement of the plurality of solar cells 31 in the state of the power generating body 10 is the first arrangement, the power generating body 10 is fabricated in a form that satisfies each of the first and second conditions.

[0248] In addition, when the first type of solar cell 31A is prepared as each of the multiple solar cell 31 in the process of step S2, in the power generating body 10 (for example, the first power generating body 10A) produced in the process of step S3, the third A long side 3LsA becomes the third long side 3Ls, the fourth A long side 4LsA becomes the fourth long side 4Ls, the third A short side 3SsA becomes the third short side 3Ss, the fourth A short side 4SsA becomes the fourth short side 4Ss, and the third A length becomes the third length L3. Furthermore, when a second type of solar cell 31B is prepared as each of the multiple solar cell 31 in the process of step S2, in the power generating body 10 (for example, the second power generating body 10B) produced in the process of step S3, the thirdB long side 3LsB becomes the third long side 3Ls, the fourthB long side 4LsB becomes the fourth long side 4Ls, the thirdB short side 3SsB becomes the third short side 3Ss, the fourthB short side 4SsB becomes the fourth short side 4Ss, and the thirdB length becomes the third length L3. Furthermore, in the process of step S2, when a third type of solar cell 31C is prepared as each of the multiple solar cell 31, in the power generating body 10 (for example, the third power generating body 10C) produced in the process of step S3, the third C long side 3LsC becomes the third long side 3Ls, the fourth C long side 4LsC becomes the fourth long side 4Ls, the third C short side 3SsC becomes the third short side 3Ss, the fourth C short side 4SsC becomes the fourth short side 4Ss, and the third C length becomes the third length L3.

[0249] Here, the first protective member 1 according to the first length L1 and the second length L2 may have, for example, a rectangular first surface 1 f whose long sides have the first length L1 and the short sides have the second length L2. Note that, for example, if the first protective member 1 expands and contracts during the process of fabricating the power generator 10, the first protective member 1 according to the first length L1 and the second length L2 may have a rectangular first surface 1 f whose long sides have the first length L1 and the short sides have the second length L2 in the power generator 10 state.

[0250] Figure 23 shows an example of a solar cell unit 3 produced during step S3 when each of the plurality of solar cells 31 prepared in step S2 is a first type of solar cell 31A. The solar cell unit 3 illustrated in Figure 23 has substantially the same configuration as the solar cell unit 3 in the first power generation body 10A shown in Figure 3. Note that between Figure 23 and Figure 3, the +x direction corresponds to the +X direction, the +y direction corresponds to the +Y direction, and the +z direction corresponds to the +Z direction.

[0251] Figure 24 shows an example of a solar cell unit 3 produced during step S3 when each of the plurality of solar cells 31 prepared in step S2 is a second type of solar cell 31B. The solar cell unit 3 illustrated in Figure 24 has substantially the same configuration as the solar cell unit 3 in the second power generation body 10B shown in Figure 18. Note that between Figure 24 and Figure 18, the +x direction corresponds to the +X direction, the +y direction corresponds to the +Y direction, and the +z direction corresponds to the +Z direction.

[0252] Figure 25 shows an example of a solar cell unit 3 produced during step S2 when each of the plurality of solar cells 31 prepared in step S2 is a third type of solar cell 31C. The solar cell unit 3 illustrated in Figure 25 has substantially the same configuration as the solar cell unit 3 in the third power generation body 10C illustrated in Figure 20. Note that between Figure 25 and Figure 20, the +x direction corresponds to the +X direction, the +y direction corresponds to the +Y direction, and the +z direction corresponds to the +Z direction.

[0253] 26 and 27, for example, the first protective member 1, the first sheet material 41s, the solar cell unit 3, the second sheet material 42s, and the second protective member 2 are stacked in this order to form a laminate 10s. In the laminate 10s, for example, of the plurality of second wiring members 34 in the solar cell unit 3, the portion to be connected to a terminal box J1 or the like outside the power generator 10 is arranged in a state where it is drawn out to the outside of the laminate 10s.

[0254] The first sheet material 41s is a resin sheet material that forms the base of the first sealing material 41. EVA, for example, is used as the material for this resin sheet material. In the laminate 10s, the first sheet material 41s is located between the first protective member 1 and the solar cell unit 3. In other words, in the laminate 10s, the first sheet material 41s is located on the first protective member 1, and the solar cell unit 3 is located on the first sheet material 41s. The first sheet material 41s may have, for example, a rectangular shape in a plan view. The first sheet material 41s may be composed of a single sheet or two or more sheets.

[0255] The second sheet material 42s is a resin sheet material that forms the base of the second sealing material 42. EVA, for example, is used as the material for this resin sheet material. The second sheet material 42s may contain a pigment. In the laminate 10s, the second sheet material 42s is located between the solar cell unit 3 and the second protective member 2. In other words, in the laminate 10s, the second sheet material 42s is located on the solar cell unit 3, and the second protective member 2 is located on the second sheet material 42s. The second sheet material 42s may have a rectangular shape in a plan view. The second sheet material 42s may be composed of a single sheet or two or more sheets.

[0256] Next, for example, a lamination process is performed on the laminate 10s. In this lamination process, for example, a laminating device (also called a laminator) is used to integrate the laminate 10s. For example, in the laminator, the laminate 10s is placed on a heater plate in a chamber, and the pressure in the chamber is reduced from 50 Pascals (Pa) to approximately 150 Pa while the laminate 10s is heated to approximately 100 degrees Celsius (100°C) to 200°C. Here, the first sheet material 41s and the second sheet material 42s are heated to a state in which they can flow to some extent. In this state, the laminate 10s is pressed in the +Z direction by a pressing body such as a diaphragm sheet in the chamber, thereby integrating the laminate 10s. Next, a crosslinking process is performed on the laminate 10s. In this cross-linking process, for example, a cross-linking furnace is used to heat the integrated laminate 10s to approximately 110°C to 210°C. This process imparts rubber elasticity to the first sheet material 41s and the second sheet material 42s, and can improve the heat resistance of the first sheet material 41s and the second sheet material 42s. In this way, the power generating body 10 can be produced.

[0257] For example, after the lamination process and cross-linking process, a terminal box J1, a frame FL1, and the like may be appropriately attached to the power generator 10. In this case, for example, a portion of the second wiring member 34 drawn from the solar cell section 3 to the outside of the power generator 10 is appropriately connected to a terminal in the terminal box J1. Furthermore, for example, when the frame FL1 is attached along the outer periphery of the power generator 10, a sealing material with low moisture permeability, such as a butyl-based resin, is filled between the outer periphery of the power generator 10 and the frame FL1. In this way, the solar cell module 100 according to the first embodiment can be manufactured.

[0258] Here, in the process of step S2, even if any one type of solar cell from among the first type of solar cell 31A, the second type of solar cell 31B, and the third type of solar cell 31C is prepared as each of the multiple solar cell 31, the arrangement of the multiple solar cell 31 is the first arrangement described above, and the power generating body 10 can be produced in a form that satisfies both the first condition and the second condition described above.

[0259] <1-5-5. Effects of the Manufacturing Method of the Solar Cell Module> According to the manufacturing method of the solar cell module 100 according to the first embodiment described above, even if any one of the first type solar cells 31A, the second type solar cells 31B, and the third type solar cells 31C, which are different in size from one another, is used as the plurality of solar cells 31, the first condition and the second condition can be satisfied when the plurality of solar cells 31 are arranged in the first arrangement in the power generating body 10 having the same size when the first surface 1f is viewed in a plan view. In other words, even if any one of the first type solar cells 31A, the second type solar cells 31B, and the third type solar cells 31C is prepared as each of the plurality of solar cells 31 in the process of step S2, the power generating body 10 can be produced in a form in which the first condition and the second condition are satisfied in the process of step S3.

[0260] Therefore, when the first surface 1f is viewed in a plan view, the area occupied by the multiple solar cells 31 in the area of ​​the power generating body 10 becomes larger, which can improve the conversion efficiency of the solar cell module 100. In other words, it is possible to manufacture power generating bodies 10 having the same size when the first surface 1f is viewed in a plan view, while ensuring the ratio of the area occupied by the multiple solar cells 31 in the power generating body 10 when the first surface 1f is viewed in a plan view. Therefore, even if any one type of solar cell from multiple types of solar cells having mutually different sizes is used as each of the multiple solar cell 31 in the power generating body 10, when the multiple solar cell 31 are arranged in the above-mentioned first arrangement, it is possible to manufacture power generating bodies 10 and solar cell modules 100 having the same outer shape size.

[0261] As described above, the mainstream size standards for solar cell 31 change over time, and production of solar cell 31 that does not meet the mainstream size standards may be discontinued. In contrast, even if any one type of solar cell among multiple types of solar cell with different sizes is adopted as each of the solar cell 31 in the power generating body 10, as long as the power generating body 10 and the solar cell module 100 have the same external size, the solar cell module 100 can be easily fixed to the installation object using a common mounting or the like. As a result, installation errors when fixing the solar cell module 100 to the installation object can be reduced. From another perspective, the number of types of power generating body 10 and solar cell module 100 that can be fixed to the installation object using the same mounting or the like can be increased. This can improve the productivity of the mounting.

[0262] Furthermore, as described above, even if any one type of solar cell among multiple types of solar cells having different sizes is used as each of the multiple solar cells 31 in the power generating body 10, when the multiple solar cells 31 are arranged in the first arrangement described above, the power generating body 10 and the solar cell module 100 can be manufactured having the same outer shape size. As a result, even if any one type of solar cell among multiple types of solar cells having different sizes is used as each of the multiple solar cells 31 in the power generating body 10, the power generating body 10 and the solar cell module 100 can be manufactured using the first protective member 1 and the second protective member 2, etc., having the same size. As a result, the conversion efficiency of the power generating body 10 and the solar cell module 100 can be ensured, while the productivity of the power generating body 10 and the solar cell module 100 can be increased. Furthermore, common design drawings for installing a mounting or the like on an installation target object can be used for more types of power generating bodies 10 and solar cell modules 100. Therefore, the number of steps required to install a solar power generation system on a building as an installation target object can be reduced. Furthermore, construction companies such as housing manufacturers that install the power generating body 10 and the solar cell modules 100 on the roof or exterior wall of a building as an installation object can reduce the amount of development work required for the installation and allocation of multiple solar cell modules 100 on the roof or exterior wall of the building. Furthermore, some of the solar cell modules 100 that are fixed in a line in a limited space such as the roof or exterior wall of the building as an installation object can be easily replaced.

[0263] <1-6. Solar cell module viewed from another perspective> Taking into account the configuration of the solar cell module 100 including the power generating body 10 described above and the manufacturing method of the solar cell module 100 including the power generating body 10, the configuration of the solar cell module 100 including the power generating body 10 viewed from another perspective will be described.

[0264] The power generating unit 10 seen from this other viewpoint has, for example, at least the above-described configuration 1 of the configurations of the power generating unit 10 described above.

[0265] Here, each of the plurality of solar cells 31 in the solar cell section 3 of the power generation body 10 may be composed of any one type of solar cell selected from the plurality of types of solar cells. The plurality of types of solar cells may include the above-mentioned first type of solar cell 31A, second type of solar cell 31B, and third type of solar cell 31C.

[0266] Fig. 3 shows a specific example of a first power generating body 10A, which is an example of a power generating body 10 in which each of the plurality of solar cells 31 in the solar cell section 3 of the power generating body 10 is composed of a first type of solar cell 31A selected from a plurality of types of solar cells, and the arrangement of the plurality of solar cells 31 is the first arrangement described above. Fig. 18 shows a specific example of a second power generating body 10B, which is an example of a power generating body 10 in which each of the plurality of solar cells 31 in the solar cell section 3 of the power generating body 10 is composed of a second type of solar cell 31B selected from a plurality of types of solar cells, and the arrangement of the plurality of solar cells 31 is the first arrangement described above. Fig. 20 shows a specific example of a third power generating body 10C, which is an example of a power generating body 10 in which each of the plurality of solar cells 31 in the solar cell section 3 of the power generating body 10 is composed of a third type of solar cell 31C selected from a plurality of types of solar cells, and the arrangement of the plurality of solar cells 31 is the first arrangement described above.

[0267] Here, as described above, when the arrangement of the plurality of solar cells 31 in the power generating body 10 is the first arrangement described above, both the first condition and the second condition described above may be satisfied.

[0268] According to the solar cell module 100 having the above-described configuration seen from another perspective of the first embodiment, the first and second conditions can be satisfied in the power generating body 10 having the same size when the first surface 1f is viewed in plan view, even if any one of the first type solar cell 31A, the second type solar cell 31B, and the third type solar cell 31C, which are different in size from one another, is used as each of the plurality of solar cells 31 in the solar cell section 3 of the power generating body 10. In other words, even if each of the plurality of solar cells 31 in the power generating body 10 is composed of any one type of solar cell selected from the plurality of types of solar cells including the first type solar cell 31A, the second type solar cell 31B, and the third type solar cell 31C, the first and second conditions can be satisfied in the power generating body 10 having the same size when the first surface 1f is viewed in plan view.

[0269] Therefore, when the first surface 1f is viewed in a plan view, the area occupied by the plurality of solar cells 31 relative to the area of ​​the power generating body 10 becomes larger, which can improve the conversion efficiency of the solar cell module 100. In other words, it is possible to manufacture power generating bodies 10 having the same size when the first surface 1f is viewed in a plan view, while ensuring the ratio of the area occupied by the plurality of solar cells 31 in the power generating body 10 when the first surface 1f is viewed in a plan view. Therefore, even if any one type of solar cell from among multiple types of solar cell having mutually different sizes is used as each of the plurality of solar cell 31 in the power generating body 10, it is possible to manufacture power generating bodies 10 and solar cell modules 100 having the same outer shape size.

[0270] As described above, the mainstream size standards for solar cell 31 change over time, and production of solar cell 31 that does not meet the mainstream size standards may be discontinued. In contrast, even if any one type of solar cell among multiple types of solar cell with different sizes is adopted as each of the solar cell 31 in the power generating body 10, as long as the power generating body 10 and the solar cell module 100 have the same external size, the solar cell module 100 can be easily fixed to the installation object using a common mounting or the like. As a result, installation errors when fixing the solar cell module 100 to the installation object can be reduced. From another perspective, the number of types of power generating body 10 and solar cell module 100 that can be fixed to the installation object using the same mounting or the like can be increased. This can improve the productivity of the mounting.

[0271] Furthermore, as described above, even if any one type of solar cell among multiple types of solar cells having mutually different sizes is used as each of the plurality of solar cells 31 in the power generating body 10, the power generating body 10 and the solar cell module 100 have the same sized external shape. As a result, even if any one type of solar cell among multiple types of solar cells having mutually different sizes is used as each of the plurality of solar cells 31 in the power generating body 10, the power generating body 10 and the solar cell module 100 can be manufactured using the first protective member 1 and the second protective member 2, etc., having the same size. As a result, the conversion efficiency of the power generating body 10 and the solar cell module 100 can be ensured, while the productivity of the power generating body 10 and the solar cell module 100 can be increased. Furthermore, common design drawings for installing a mounting or the like on an installation target object can be used for more types of power generating bodies 10 and solar cell modules 100. Therefore, the number of steps required to install a solar power generation system on a building as an installation target object can be reduced. Furthermore, construction companies such as housing manufacturers that install the power generating body 10 and the solar cell modules 100 on the roof or exterior wall of a building as an installation object can reduce the amount of development work required for the construction and allocation involved in installing multiple solar cell modules 100 on the roof or exterior wall of the building. Furthermore, some of the solar cell modules 100 that are fixed in a line in a limited space such as the roof or exterior wall of a building can be easily replaced.

[0272] Here, for example, it is assumed that each of the plurality of solar cells 31 in the solar cell section 3 of the power generating body 10 is a first-type solar cell 31A. In this case, for example, the first-type solar cell 31A may be a solar cell produced by dividing each of the one or more first-type mother substrates 31PA described above in a direction along one side of the first-standard light-receiving surface F1PA of the first-type mother substrate 31PA. The one or more first-type mother substrates 31PA may be one or more first-standard solar cells each having the first-standard light-receiving surface F1PA. Also, for example, it is assumed that each of the plurality of solar cells 31 in the solar cell section 3 of the power generating body 10 is a second-type solar cell 31B. In this case, for example, the second-type solar cell 31B may be a solar cell produced by dividing each of the one or more second-type mother substrates 31PB described above in a direction along one side of the second-standard light-receiving surface F1PB of the second-type mother substrate 31PB. The one or more second-type mother substrates 31PB may be one or more second-standard solar cells each having a second-standard light-receiving surface F1PB. It is also possible, for example, that each of the multiple solar cells 31 in the solar cell section 3 of the power generating body 10 is a third-type solar cell 31C. In this case, for example, the third-type solar cell 31C may be a solar cell produced by dividing each of the one or more third-type mother substrates 31PC described above in a direction along one side of the third-standard light-receiving surface F1PC of the third-type mother substrate 31PC. The one or more third-type mother substrates 31PC may be one or more third-standard solar cells each having a third-standard light-receiving surface F1PC. In this way, if multiple solar cells 31 each having rectangular first cell surfaces F1 and second cell surfaces F2 applicable to the power generating body 10 can be prepared by dividing a mother substrate 31P having a standard size, the multiple solar cells 31 can be efficiently prepared.

[0273] Here, for example, it is assumed that each of the multiple solar cells 31 in the solar cell section 3 of the power generation body 10 is a first-type solar cell 31A. In this case, for example, the first-type solar cell 31A may be a solar cell manufactured by dividing each of the one or more first-type mother substrates 31PA described above into two in a direction along one side of the first-standard light-receiving surface F1PA serving as the light-receiving surface of the first-type mother substrate 31PA. The one or more first-type mother substrates 31PA may be one or more first-standard solar cells, each having a first-standard light-receiving surface F1PA. More specifically, for example, the first-type solar cell 31A may be a solar cell manufactured by dividing each of the one or more first-type mother substrates 31PA described above into two equal parts in a direction along one side of the first-standard light-receiving surface F1PA. One side of the light receiving surface F1PA of the first standard may be either one side of the first pair of first sides or one side of the second pair of second sides of the light receiving surface F1PA of the first standard.

[0274] Furthermore, for example, it is assumed that each of the multiple solar cells 31 in the solar cell section 3 of the power generating body 10 is a second-type solar cell 31B. In this case, for example, the second-type solar cell 31B may be a solar cell produced by dividing each of the one or more second-type mother substrates 31PB into two in a direction along one side of the second-standard light-receiving surface F1PB serving as the light-receiving surface of the second-type mother substrate 31PB. The one or more second-type mother substrates 31PB may be one or more second-standard solar cells each having the second-standard light-receiving surface F1PB. More specifically, for example, the second-type solar cell 31B may be a solar cell produced by dividing each of the one or more second-type mother substrates 31PB into two equal parts in a direction along one side of the second-standard light-receiving surface F1PB. One side of the second-standard light-receiving surface F1PB may be either one of the first pair of first sides or the second pair of second sides of the second-standard light-receiving surface F1PB.

[0275] Furthermore, for example, it is assumed that each of the multiple solar cells 31 in the solar cell section 3 of the power generating body 10 is a third-type solar cell 31C. In this case, for example, the third-type solar cell 31C may be a solar cell produced by dividing each of the one or more third-type mother substrates 31PC described above into two in a direction along one side of the third-standard light-receiving surface F1PC serving as the light-receiving surface of the third-type mother substrate 31PC. The one or more third-type mother substrates 31PC may be one or more third-standard solar cells each having a third-standard light-receiving surface F1PC. More specifically, for example, the third-type solar cell 31C may be a solar cell produced by dividing each of the one or more third-type mother substrates 31PC described above into two equal parts in a direction along one side of the third-standard light-receiving surface F1PC. One side of the third-standard light-receiving surface F1PC may be either one of the first pair of first sides or the second pair of second sides of the third-standard light-receiving surface F1PC. Here, by dividing the mother substrate 31P of the solar cell into two, it is possible to prepare a plurality of solar cells 31 each having a rectangular first cell surface F1 and a rectangular second cell surface F2 that are applicable to the power generating body 10. As a result, it is possible to efficiently prepare a plurality of solar cells 31.

[0276] Also, for example, as described above, the first length L1 may be 1316 mm to 1377 mm, and the second length L2 may be 778 mm to 804 mm.

[0277] 28 to 30 , a solar cell device 700 includes, for example, a plurality of solar cell modules 100. In FIG. 28 , three solar cell modules 100 are illustrated as an example of the plurality of solar cell modules 100. The plurality of solar cell modules 100 is not limited to three solar cell modules 100. The plurality of solar cell modules 100 may be, for example, two solar cell modules 100, or any number of solar cell modules 100 equal to or greater than four.

[0278] In the examples of FIGS. 28 to 30 , the solar cell device 700 is fixed, for example, on the roof 90 of a building, which is an example of an installation object. More specifically, the solar cell device 700 is installed on a roof surface 90f of the roof 90. In the solar cell device 700, for example, multiple solar cell modules 100 are arranged along the +Y direction. For example, a folded-plate roof is applied to the roof 90. When a folded-plate roof is applied to the roof 90, the roof 90 has, for example, alternating linearly extending convex portions 90p and linearly extending concave portions 90d. Here, for example, the convex portions 90p protrude in the +Z direction and extend linearly along the +X direction. For example, the concave portions 90d are recessed in the −Z direction and extend linearly along the +X direction. For example, the convex portions 90p and the concave portions 90d are arranged alternately in the +Y direction. The roof 90 may have, for example, a portion (also called a protrusion) 90c that protrudes in the +Z direction on the convex portion 90p.

[0279] The solar cell device 700 may include, for example, a plurality of fasteners 80 for fastening the plurality of solar cell modules 100 to the roof surface 90 f. The plurality of fasteners 80 may function, for example, as a mount for fastening the plurality of solar cell modules 100 to an installation object.

[0280] 28 to 30 , each of the plurality of fasteners 80 includes a first member 81, a second member 82, a third member 83, two first fastening portions 84, and a second fastening portion 85.

[0281] For example, the first member 81 and the second member 82 are positioned such that they sandwich the protrusion 90c. More specifically, the first member 81 is primarily positioned on the -Y direction side of the protrusion 90c, and the second member 82 is positioned on the +Y direction side of the protrusion 90c. The first member 81 and the second member 82 are fastened together by two first fastening portions 84, sandwiching the protrusion 90c. Each of the two first fastening portions 84 may be composed of a bolt and nut that fit together. The first member 81 has a first top plate portion 81u at its top, which has a flat top surface. The frame FL1 of the first solar cell module 100 is placed on the area on the -Y direction side of the first top plate portion 81u. The frame FL1 of the second solar cell module 100, which is located on the +Y-direction side of the first solar cell module 100, is placed on the +Y-direction area of ​​the first top panel 81u. The third member 83 is located above the first top panel 81u. More specifically, the third member 83 is located on the frame FL1 of the first solar cell module 100 and the frame FL1 of the second solar cell module 100. The third member 83 and the first top panel 81u are fastened together by a second fastening member 85 so as to sandwich the frame FL1 of the first solar cell module 100 and the frame FL1 of the second solar cell module 100, which are placed on the first top panel 81u. The second fastening member 85 may be composed of a bolt and a nut that fit together. The configuration of the fastener 80 is not limited to this. The fixing device 80 may have a simple structure that allows the solar cell module 100 to be fixed to the roof 90, for example.

[0282] <1-8. Summary of the First Embodiment> According to the solar cell module 100 of the first embodiment, as described above, even if any one of the first type solar cell 31A, the second type solar cell 31B, and the third type solar cell 31C, which are different in size from one another, is used as each of the plurality of solar cells 31 in the power generating body 10, the first condition and the second condition can be satisfied when the arrangement of the plurality of solar cells 31 is the first arrangement described above in the power generating body 10 having the same size when the first surface 1f is viewed in a plan view. Therefore, when the first surface 1f is viewed in a plan view, the area occupied by the plurality of solar cells 31 relative to the area of ​​the power generating body 10 is increased, and the conversion efficiency of the solar cell module 100 can be improved. In other words, power generating bodies 10 having the same size when the first surface 1f is viewed in a plan view can be manufactured while ensuring the ratio of the area occupied by the plurality of solar cells 31 in the power generating body 10 when the first surface 1f is viewed in a plan view. Therefore, even if any one type of solar cell from among multiple types of solar cells having mutually different sizes is used as each of the multiple solar cells 31 in the power generating body 10, it is possible to manufacture a power generating body 10 and a solar cell module 100 having the same sized outer shape. As a result, even if any one type of solar cell from among multiple types of solar cells having mutually different sizes is used as each of the multiple solar cells 31 in the power generating body 10, as long as the power generating body 10 and the solar cell module 100 have the same sized outer shape, the solar cell module 100 can be easily fixed to an installation object such as the roof or exterior wall of a building using a common mount or the like. Therefore, construction errors when fixing the solar cell module 100 to an installation object can be reduced.

[0283] According to the manufacturing method for the solar cell module 100 of the first embodiment, as described above, even if any one of the first type solar cells 31A, the second type solar cells 31B, and the third type solar cells 31C, which are different in size from one another, is used as each of the plurality of solar cells 31 in the power generating body 10, the first and second conditions can be satisfied when the plurality of solar cells 31 are arranged in the first arrangement described above in the power generating body 10 having the same size when the first surface 1f is viewed in a plan view. Therefore, when the first surface 1f is viewed in a plan view, the area occupied by the plurality of solar cells 31 in the area of ​​the power generating body 10 is increased, and the conversion efficiency of the solar cell module 100 can be improved. In other words, power generating bodies 10 having the same size when the first surface 1f is viewed in a plan view can be manufactured while ensuring the ratio of the area occupied by the plurality of solar cells 31 in the power generating body 10 when the first surface 1f is viewed in a plan view. Therefore, even if any one type of solar cell from among multiple types of solar cells having mutually different sizes is used as each of the plurality of solar cells 31 in the power generating body 10, it is possible to manufacture a power generating body 10 and a solar cell module 100 having the same sized outer shape. As a result, even if any one type of solar cell from among multiple types of solar cells having mutually different sizes is used as each of the plurality of solar cells 31 in the power generating body 10, as long as the power generating body 10 and the solar cell module 100 have the same sized outer shape, the solar cell module 100 can be easily fixed to the installation object using a common mount or the like. Therefore, it is possible to reduce construction errors when fixing the solar cell module 100 to the installation object.

[0284] 2. Other Embodiments The present disclosure is not limited to the first embodiment described above, and various modifications and improvements can be made without departing from the gist of the present disclosure.

[0285] 2-1. Second embodiment In the solar cell module 100 according to the first embodiment, for example, as shown in FIGS. 31 and 32 , the third long side 3Ls and the fourth long side 4Ls of each of the plurality of solar cells 31 may be located along the +Y direction as a first direction, and the third short side 3Ss and the fourth short side 4Ss of each of the plurality of solar cells 31 may be located along the +X direction as a second direction.

[0286] In the present disclosure, an arrangement of the plurality of solar cells 31 in the power generating body 10 in which the third long side 3Ls and the fourth long side 4Ls of each of the plurality of solar cells 31 are located along the +Y direction as a first direction and the third short side 3Ss and the fourth short side 4Ss of each of the plurality of solar cells 31 are located along the +X direction as a second direction is also referred to as a "second arrangement." In the power generating body 10, when the plurality of solar cells 31 are arranged in the second arrangement, the long side of the first surface 1f and the short side of the first cell surface F1 of each of the plurality of solar cells 31 are located along the +X direction as a second direction, and the short side of the first surface 1f and the long side of the first cell surface F1 of each of the plurality of solar cells 31 are located along the +Y direction as a first direction. Furthermore, when the plurality of solar cells 31 are arranged in the second arrangement, the third direction may be the +X direction as a second direction, and the fourth direction may be the +Y direction as a first direction.

[0287] When the arrangement of the multiple solar cells 31 in the power generating body 10 is the second arrangement described above, when the multiple solar cells 31 in the power generating body 10 are viewed in plan from the first surface 1f side, each of the multiple solar cells 31 may have a rectangular shape having a third long side 3Ls and a fourth long side 4Ls that face each other in the +X direction as the second direction, and a third short side 3Ss and a fourth short side 4Ss that face each other in the +Y direction as the first direction. The third long side 3Ls and the fourth long side 4Ls of each of the multiple solar cells 31 may be located along the +Y direction as the first direction. Each of the multiple solar cells 31 may have a third length L3 along the +Y direction as the first direction. The third short side 3Ss and the fourth short side 4Ss of each of the multiple solar cells 31 may be located along the +X direction as the second direction. Each of the plurality of solar cell strings 30 may have a fourth length L4 along the +X direction as the second direction. In each of the plurality of solar cell strings 30, two or more solar cell cells 31 may be aligned along the +X direction as the second direction.

[0288] Furthermore, when the arrangement of the multiple solar cell units 31 in the power generating body 10 is the second arrangement described above, when the multiple solar cell strings 30 in the power generating body 10 are viewed in plan from the first surface 1f side, each of the multiple third wiring members 32 in each of the multiple solar cell strings 30 may be positioned along the +X direction as the second direction. In other words, when the multiple solar cell strings 30 are viewed in plan from the first surface 1f side, the third wiring member 32 may have an elongated shape along the +X direction as the second direction. In yet another way, when the multiple solar cell strings 30 are viewed in plan from the first surface 1f side, the third wiring member 32 may have a longitudinal direction along the +X direction as the second direction. Furthermore, in each of the multiple solar cell strings 30, the distance between two adjacent solar cell units 31 in the +X direction as the second direction among two or more solar cell units 31 may be the first distance I1.

[0289] Furthermore, when the arrangement of the multiple solar cell units 31 in the power generating body 10 is the second arrangement described above, a first second wiring member 34 of the multiple second wiring members 34 may be electrically connected to the solar cell string 30 located at the end of the multiple solar cell strings 30 in the +Y direction, which is the first direction. A second second wiring member 34 of the multiple second wiring members 34 may be electrically connected to the solar cell string 30 located at the end of the multiple solar cell strings 30 in the -Y direction, which is the direction opposite to the first direction.

[0290] Here, for example, when the arrangement of the plurality of solar cells 31 in the power generating body 10 is the second arrangement described above, the following third condition and the following fourth condition may be satisfied.

[0291] The third condition is that when the first surface 1f is viewed in a plane, the sum of the distance (first distance) D1 between the first long side 1Ls and the solar cell unit 3 in the +Y direction as the first direction and the distance (second distance) D2 between the solar cell unit 3 and the second long side 2Ls in the +Y direction as the first direction is less than half the third length L3.

[0292] The fourth condition is that when the first surface 1f is viewed in a plane, the sum of the distance (third distance) D3 between the first short side 1Ss and the solar cell unit 3 in the +X direction as the second direction and the distance (fourth distance) D4 between the solar cell unit 3 and the second short side 2Ss in the +X direction as the second direction is less than half the fourth length L4.

[0293] The third condition may be, for example, that each of the first distance D1 and the second distance D2 is less than one-fourth of the third length L3. The fourth condition may be, for example, that each of the third distance D3 and the fourth distance D4 is less than one-fourth of the fourth length L4.

[0294] If the power generating body 10 satisfies the third and fourth conditions described above, when the first surface 1f is viewed in a planar view, the area of ​​the multiple solar cell units 31 relative to the area of ​​the power generating body 10 will be larger, and the conversion efficiency of the solar cell module 100 may be improved.

[0295] 2-1-1. An Example of a Power Generator in Which the Multiple Solar Cells are Arranged in the Second Arrangement> An example of a power generator 10 according to the second embodiment (also referred to as a fourth power generator) 10D shown in FIG. 31 has the multiple solar cells 31 arranged in the second arrangement. This fourth power generator 10D may have a third type of solar cell 31C as each of the multiple solar cells 31. Here, for example, the third length L3 may be 182 mm as the third standard length L3C, and the fourth length L4 may be 91 mm or approximately 91 mm, which is half of the third standard length L3C. In other words, for example, the value obtained by dividing the fourth length L4 by the third length L3 may be 1 / 2 or approximately 1 / 2. A solar cell 31 having a third length L3 of 182 mm and a fourth length L4 of 91 mm may be fabricated, for example, by dividing a mother substrate 31P of the above-mentioned M10 size standard into two.

[0296] <<One Specific Example of Fourth Power Generator>> In one specific example of a fourth power generator 10D shown in Fig. 31 (hereinafter also referred to as one specific example of Fig. 31), four columns of solar cells 31, each made up of 14 solar cells 31 lined up along the +X direction as the second direction, are lined up along the +Y direction as the first direction. In other words, a total of 56 solar cells 31 in 14 rows and 4 columns are positioned in a matrix along an imaginary XY plane.

[0297] 31 , the solar cell unit 3 includes eight solar cell strings 30 as the plurality of solar cell strings 30. More specifically, the eight solar cell strings 30 include a first A solar cell string 30a1, a second A solar cell string 30a2, a third A solar cell string 30a3, a fourth A solar cell string 30a4, a first B solar cell string 30b1, a second B solar cell string 30b2, a third B solar cell string 30b3, and a fourth B solar cell string 30b4. Here, it is assumed that the center or approximately the center of the power generation body 10 in the +X direction (second direction) along each of the first long side 1Ls and the second long side 2Ls is set as the boundary, and the power generation body 10 is virtually divided into a region A1 (also referred to as a first region) located on the −X direction (second direction) side, and a region A2 (also referred to as a second region) located on the +X direction (second direction) side. In this case, in the first region A1, the firstA solar cell string 30a1, the secondA solar cell string 30a2, the thirdA solar cell string 30a3, and the fourthA solar cell string 30a4 are lined up in this order along the +Y direction (first direction). In addition, in the second area A2, the first B solar cell string 30b1, the second B solar cell string 30b2, the third B solar cell string 30b3 and the fourth B solar cell string 30b4 are arranged in the order shown along the +Y direction as the first direction.

[0298] 31 , for example, the firstA solar cell string 30a1, the secondB solar cell string 30b2, the thirdA solar cell string 30a3, and the fourthB solar cell string 30b4 have substantially the same configuration, and the firstB solar cell string 30b1, the secondA solar cell string 30a2, the thirdB solar cell string 30b3, and the fourthA solar cell string 30a4 have substantially the same configuration. Then, for example, in the first region A1, the firstA solar cell string 30a1, the secondA solar cell string 30a2, the thirdA solar cell string 30a3, and the fourthA solar cell string 30a4 have substantially two-fold rotational symmetry in which the configurations of two solar cell strings 30 adjacent to each other in the +Y direction as a first direction become substantially the same when rotated 180 degrees about an axis of symmetry parallel to the Z axis. Furthermore, for example, in the second region A2, for the first B solar cell string 30b1, the second B solar cell string 30b2, the third B solar cell string 30b3 and the fourth B solar cell string 30b4, the configurations of two adjacent solar cell strings 30 in the +Y direction as the first direction have a relationship of substantial two-fold rotational symmetry, in which the configurations become approximately the same when rotated 180 degrees around the axis of symmetry parallel to the Z axis.

[0299] For example, the first A solar cell string 30a1 and the second A solar cell string 30a2 have a substantially two-fold rotational symmetry relationship in which they have substantially the same configuration when rotated 180 degrees around an axis of symmetry parallel to the Z axis. For example, the second A solar cell string 30a2 and the third A solar cell string 30a3 have a substantially two-fold rotational symmetry relationship in which they have substantially the same configuration when rotated 180 degrees around an axis of symmetry parallel to the Z axis. For example, the third A solar cell string 30a3 and the fourth A solar cell string 30a4 have a substantially two-fold rotational symmetry relationship in which they have substantially the same configuration when rotated 180 degrees around an axis of symmetry parallel to the Z axis. For example, the first B solar cell string 30b1 and the second B solar cell string 30b2 have a substantially two-fold rotational symmetry relationship in which they have substantially the same configuration when rotated 180 degrees around an axis of symmetry parallel to the Z axis. For example, the second-B solar cell string 30b2 and the third-B solar cell string 30b3 have a substantially two-fold rotational symmetry relationship in which they have substantially the same configuration when rotated 180 degrees around an axis of symmetry parallel to the Z axis. For example, the third-B solar cell string 30b3 and the fourth-B solar cell string 30b4 have a substantially two-fold rotational symmetry relationship in which they have substantially the same configuration when rotated 180 degrees around an axis of symmetry parallel to the Z axis.

[0300] 31 , each of the multiple solar cell strings 30 includes seven solar cell strings 31 arranged along the +X direction as the second direction as two or more solar cell strings 31. More specifically, the seven solar cell strings 31 include a first solar cell string 31a, a second solar cell string 31b, a third solar cell string 31c, a fourth solar cell string 31d, a fifth solar cell string 31e, a sixth solar cell string 31f, and a seventh solar cell string 31g. The first solar cell string 31a, the second solar cell string 31b, the third solar cell string 31c, the fourth solar cell string 31d, the fifth solar cell string 31e, the sixth solar cell string 31f, and the seventh solar cell string 31g are arranged in the +X direction as the second direction in this order. Additionally, seven solar cells 31 in the firstA solar cell string 30a1 and seven solar cells 31 in the firstB solar cell string 30b1 are aligned in a row along the +X direction as the second direction. Seven solar cells 31 in the secondA solar cell string 30a2 and seven solar cells 31 in the secondB solar cell string 30b2 are aligned in a row along the +X direction as the second direction. Seven solar cells 31 in the thirdA solar cell string 30a3 and seven solar cells 31 in the thirdB solar cell string 30b3 are aligned in a row along the +X direction as the second direction. Seven solar cells 31 in the fourthA solar cell string 30a4 and seven solar cells 31 in the fourthB solar cell string 30b4 are aligned in a row along the +X direction as the second direction.

[0301] 31 , in each of the plurality of photovoltaic strings 30, the interval between two adjacent photovoltaic cells 31 is the same first interval I1 for all pairs of two adjacent photovoltaic cells 31. In other words, in each photovoltaic string 30, the interval between two adjacent photovoltaic cells 31 is the same first interval I1 for each of six pairs of two adjacent photovoltaic cells 31.

[0302] In one specific example of Figure 31, for each of the first A solar cell string 30a1, the second B solar cell string 30b2, the third A solar cell string 30a3 and the fourth B solar cell string 30b4, the third wiring member 32 connects the second output portion 312b on the second cell surface F2 side of one solar cell 31 to the busbar portion 311b on the first cell surface F1 side of another solar cell 31 that is adjacent to this one solar cell 31 in the -X direction, which is the direction opposite to the second direction. Furthermore, for example, for each of the firstB solar cell string 30b1, the secondA solar cell string 30a2, the thirdB solar cell string 30b3 and the fourthA solar cell string 30a4, the third wiring member 32 connects the busbar portion 311b on the first cell surface F1 side of one solar cell 31 to the second output portion 312b on the second cell surface F2 side of another solar cell 31 that is adjacent to this one solar cell 31 in the -X direction, which is opposite to the second direction.

[0303] 31 , each of the plurality of third wiring members 32 electrically connects the first solar cell 31 a and the second solar cell 31 b. For example, each of the plurality of third wiring members 32 includes a portion bonded to the first solar cell 31 a and a portion bonded to the second solar cell 31 b. Each of the plurality of third wiring members 32 electrically connects the second solar cell 31 b and the third solar cell 31 c. For example, each of the plurality of third wiring members 32 includes a portion bonded to the second solar cell 31 b and a portion bonded to the third solar cell 31 c. Each of the plurality of third wiring members 32 electrically connects the third solar cell 31 c and the fourth solar cell 31 d. For example, each of the plurality of third wiring members 32 includes a portion bonded to the third solar cell 31c and a portion bonded to the fourth solar cell 31d. Each of the plurality of third wiring members 32 is in a state in which the fourth solar cell 31d and the fifth solar cell 31e are electrically connected. For example, each of the plurality of third wiring members 32 includes a portion bonded to the fourth solar cell 31d and a portion bonded to the fifth solar cell 31e. Each of the plurality of third wiring members 32 is in a state in which the fifth solar cell 31e and the sixth solar cell 31f are electrically connected. For example, each of the plurality of third wiring members 32 includes a portion bonded to the fifth solar cell 31e and a portion bonded to the sixth solar cell 31f. Each of the plurality of third wiring members 32 is in a state in which the sixth solar cell 31f and the seventh solar cell 31g are electrically connected. For example, each of the multiple third wiring members 32 includes a portion joined to the sixth solar cell 31f and a portion joined to the seventh solar cell 31g.

[0304] 31 , in the first region A1, for the firstA solar cell string 30a1, the secondA solar cell string 30a2, the thirdA solar cell string 30a3, and the fourthA solar cell string 30a4, the interval between adjacent two solar cell strings 30 is the same second interval I2 for all pairs of adjacent two solar cell strings 30. In other words, for each of the three pairs of adjacent two solar cell strings 30, the interval between adjacent two solar cell strings 30 is the same second interval I2. Furthermore, in the second region A2, for the firstB solar cell string 30b1, the secondB solar cell string 30b2, the thirdB solar cell string 30b3, and the fourthB solar cell string 30b4, the interval between adjacent two solar cell strings 30 is the same second interval I2 for all pairs of adjacent two solar cell strings 30. In other words, for each of the three sets of two adjacent solar cell strings 30, the interval between the two adjacent solar cell strings 30 is the same second interval I2.

[0305] In one specific example of FIG. 31 , the plurality of first wiring members 33 are five first wiring members 33 .

[0306] Here, the first first wiring member 33 electrically connects the firstA solar cell string 30a1 and the secondA solar cell string 30a2. For example, the first first wiring member 33 is connected to the plurality of second output portions 312b on the second cell surface F2 side of the first solar cell 31a in the firstA solar cell string 30a1 by the plurality of third wiring members 32. For example, the first first wiring member 33 is connected to the plurality of busbar portions 311b on the first cell surface F1 side of the first solar cell 31a in the secondA solar cell string 30a2 by the plurality of third wiring members 32.

[0307] The second first wiring member 33 electrically connects the secondA solar cell string 30a2 and the thirdA solar cell string 30a3. For example, the second first wiring member 33 is connected to the second output portions 312b on the second cell surface F2 side of the seventh solar cell 31g in the secondA solar cell string 30a2 by the third wiring members 32. For example, the second first wiring member 33 is connected to the busbar portions 311b on the first cell surface F1 side of the seventh solar cell 31g in the thirdA solar cell string 30a3 by the third wiring members 32.

[0308] The third first wiring member 33 electrically connects the 3A solar cell string 30a3 and the 4A solar cell string 30a4. For example, the third first wiring member 33 is connected to the plurality of second output portions 312b on the second cell surface F2 side of the first solar cell 31a in the 3A solar cell string 30a3 by the plurality of third wiring members 32. For example, the third first wiring member 33 is connected to the plurality of busbar portions 311b on the first cell surface F1 side of the first solar cell 31a in the 4A solar cell string 30a4 by the plurality of third wiring members 32.

[0309] The fourth first wiring member 33 electrically connects the 1B solar cell string 30b1 and the 2B solar cell string 30b2. For example, the fourth first wiring member 33 is connected to the plurality of second output portions 312b on the second cell surface F2 side of the seventh solar cell 31g in the 1B solar cell string 30b1 by the plurality of third wiring members 32. For example, the fourth first wiring member 33 is connected to the plurality of busbar portions 311b on the first cell surface F1 side of the seventh solar cell 31g in the 2B solar cell string 30b2 by the plurality of third wiring members 32.

[0310] The second first wiring member 33 electrically connects the second-B solar cell string 30b2 and the third-B solar cell string 30b3. For example, the second output portions 312b on the second cell surface F2 side of the first solar cell 31a in the second-B solar cell string 30b2 are connected to the second first wiring member 33 by the third wiring members 32. For example, the second first wiring member 33 is connected to the busbar portions 311b on the first cell surface F1 side of the first solar cell 31a in the third-B solar cell string 30b3 by the third wiring members 32.

[0311] The fifth first wiring member 33 electrically connects the third-B solar cell string 30b3 and the fourth-B solar cell string 30b4. For example, the fifth first wiring member 33 is connected to the plurality of second output portions 312b on the second cell surface F2 side of the seventh solar cell 31g in the third-B solar cell string 30b3 by the plurality of third wiring members 32. For example, the fifth first wiring member 33 is connected to the plurality of busbar portions 311b on the first cell surface F1 side of the seventh solar cell 31g in the fourth-B solar cell string 30b4 by the plurality of third wiring members 32.

[0312] As a result, in the first area A1, the 1A solar cell string 30a1, the 2A solar cell string 30a2, the 3A solar cell string 30a3, and the 4A solar cell string 30a4 are electrically connected in series in this order, while in the second area A2, the 1B solar cell string 30b1, the 2B solar cell string 30b2, the 3B solar cell string 30b3, and the 4B solar cell string 30b4 are electrically connected in series in this order.

[0313] 31 , the first second wiring member 34 is electrically connected to each of the 4A solar cell string 30a4 and the 4B solar cell string 30b4. For example, the first second wiring member 34 is connected to the multiple second output portions 312b on the second cell surface F2 side of the seventh solar cell 31g in the 4A solar cell string 30a4 by multiple third wiring members 32. For example, the first second wiring member 34 is connected to the multiple second output portions 312b on the second cell surface F2 side of the first solar cell 31a in the 4B solar cell string 30b4 by multiple third wiring members 32. For example, the second second wiring member 34 is electrically connected to each of the 1A solar cell string 30a1 and the 1B solar cell string 30b1. For example, the plurality of busbar portions 311b on the first cell surface F1 side of the seventh solar cell 31g in the 1A solar cell string 30a1 and the second second wiring member 34 are connected by the plurality of third wiring members 32. For example, the plurality of busbar portions 311b on the first cell surface F1 side of the first solar cell 31a in the 1B solar cell string 30b1 and the second second wiring member 34 are connected by the plurality of third wiring members 32.

[0314] Furthermore, the firstA solar cell string 30a1 and the secondA solar cell string 30a2, which are electrically connected in series, and the firstB solar cell string 30b1 and the secondB solar cell string 30b2, which are electrically connected in series, are electrically connected in parallel between the second second wiring member 34 and the second first wiring member 33. Between the second first wiring member 33 and the first second wiring member 34, the thirdA solar cell string 30a3 and the fourthA solar cell string 30a4, which are electrically connected in series, and the thirdB solar cell string 30b3 and the fourthB solar cell string 30b4, which are electrically connected in series, are electrically connected in parallel.

[0315] Here, for example, compared to the third power generating body 10C shown in FIG. 20 , the fourth power generating body 10D shown in FIG. 31 can have an increased number of solar cell cells 31 arranged in a row along the third direction. In FIG. 20 , the third direction is the +Y direction as the first direction, and in FIG. 31 , the third direction is the +X direction as the second direction. Therefore, in the fourth power generating body 10D, for example, the solar cell cells 31 arranged along the third direction can be divided into two or more solar cell strings 30. Then, in the fourth power generating body 10D, for example, first wiring members 33 and second wiring members 34 can be arranged between the solar cell cells 31 arranged along the third direction to connect the solar cell strings 30 in parallel. As a result, in the fourth power generating body 10D shown in FIG. 31 , the number of solar cell cells 31 connected in series and the number of solar cell cells 31 connected in parallel can be easily adjusted in the power generating body 10.

[0316] Here, for example, assume that the solar cell unit 3 is viewed from the first surface 1f side in a plan view. In this case, the distance between the first first wiring member 33 and the two first solar cells 31a located furthest in the -X direction in the firstA solar cell string 30a1 and the secondA solar cell string 30a2 is set to distance d1. The distance between the second first wiring member 33 and the two seventh solar cells 31g located furthest in the +X direction in the secondA solar cell string 30a2 and the thirdA solar cell string 30a3 is set to distance d1. The distance between the third first wiring member 33 and the two first solar cells 31a located furthest in the -X direction in the thirdA solar cell string 30a3 and the fourthA solar cell string 30a4 is set to distance d1. The distance between the fourth first wiring member 33 and the two seventh solar cells 31g located furthest in the +X direction in the firstB solar cell string 30b1 and the secondB solar cell string 30b2 is set to distance d1. The distance between the second first wiring member 33 and the two first solar cells 31a located furthest in the -X direction in the secondB solar cell string 30b2 and the thirdB solar cell string 30b3 is set to distance d1. The distance between the fifth first wiring member 33 and the two seventh solar cells 31g located furthest in the +X direction in the thirdB solar cell string 30b3 and the fourthB solar cell string 30b4 is set to distance d1.

[0317] Here, for example, assume that the solar cell unit 3 is viewed from the first surface 1f side in a plan view. In this case, the distance between the second second wiring member 34 and the seventh solar cell 31g located furthest in the +X direction in the firstA solar cell string 30a1, and the distance between the second second wiring member 34 and the first solar cell 31a located furthest in the -X direction in the firstB solar cell string 30b1 are each set to distance d1. Furthermore, the distance between the first second wiring member 34 and the seventh solar cell 31g located furthest in the +X direction in the fourthA solar cell string 30a4, and the distance between the first second wiring member 34 and the first solar cell 31a located furthest in the -X direction in the fourthB solar cell string 30b4 are each set to distance d1.

[0318] For example, as shown in FIG. 33 , the first portion of the first second wiring member 34 may be connected to a first terminal box J1 (first terminal box J11) located on the rear surface 10b of the power generator 10. For example, the second portion of the second second wiring member 34 may be connected to a second terminal box J1 (second terminal box J12) located on the rear surface 10b of the power generator 10. Alternatively, for example, the first second wiring member 34 and the second first wiring member 33 may be connected via the first terminal box J11. In this case, the first terminal box J11 may include a bypass diode. Here, the first second wiring member 34 and the second first wiring member 33 may be connected via a bypass diode. Alternatively, for example, the second second wiring member 34 and the second first wiring member 33 may be connected via the second terminal box J12. In this case, the second terminal box J12 may include a bypass diode. Here, the second second wiring member 34 and the second first wiring member 33 may be connected via a bypass diode.

[0319] <2-1-2. Method for Setting Upper and Lower Limits of First Length and Second Length>> Here, an example of a method for setting the upper and lower limits of each of the first length L1 and the second length L2 will be described.

[0320] Here, in one specific example of the fourth power generating body 10D in FIG. 31 , it is assumed that a third type of solar cell 31C is used as each of the multiple solar cell units 31. In other words, the third length L3 is 182 mm, and the fourth length L4 is 91 mm. The width w1 of each of the first wiring member 33 and the second wiring member 34 is 6 mm. The lower limit of each of the first spacing I1 and the second spacing I2 is 1.5 mm, and the upper limit of each of the first spacing D1 and the second spacing D2 is 8 mm, and the upper limit of the sum of the first spacing D1 and the second spacing D2 is 91 (= 182 / 2) mm. The lower limit of each of the third spacing D3 and the fourth spacing D4 is 8 mm, and the upper limit of the sum of the third spacing D3 and the fourth spacing D4 is 45.5 (= 91 / 2) mm.

[0321] 31 , the upper limit L1ma (unit: mm) of the first length L1 that satisfies the fourth condition above is calculated by the following equation (7) using the fourth length L4. Here, for example, the number of two or more solar cells 31 in each of the multiple solar cell strings 30 is N2s, the upper limit of the first interval I1 is 4 mm, the width w1 of each of the first wiring member 33 and the second wiring member 34 is 6 mm, and the interval d1 between each of the first wiring member 33 and the second wiring member 34 and the solar cell 31 is 3 mm.

[0322] L1ma=(L4×N2s)×2+4×(N2s−1)×2+3×4+6×3+(L4 / 2) (7).

[0323] Specifically, for one specific example of the fourth power generating body 10D in Figure 31, the number N2s of two or more solar cells 31 is 7, and the fourth length L4 is 91 (= 182 / 2) mm, so the upper limit L1ma of the first length L1 is calculated to be 1397.5 mm.

[0324] 31 , the lower limit L1mi (unit: mm) of the first length L1 that satisfies the fourth condition above is calculated by the following formula (8) using the number N2s of two or more solar cells 31 in each of the multiple solar cell strings 30 and the fourth length L4. Here, for example, the lower limit of the first interval I1 is set to 1.5 mm, the width w1 of each of the first wiring member 33 and the second wiring member 34 is set to 6 mm, the distance d1 between each of the first wiring member 33 and the second wiring member 34 and the solar cell 31 is set to 3 mm, and the lower limit of each of the first distance D1 and the second distance D2 is set to 8 mm.

[0325] L1mi=(L4×N2s)×2+1.5×(N2s−1)×2+3×4+6×3+8×2 (8).

[0326] Specifically, for one specific example of the fourth power generating body 10D in Figure 31, the number N2s of two or more solar cells 31 is 7, and the fourth length L4 is 91 (= 182 / 2) mm, so the lower limit L1mi of the first length L1 is calculated to be 1,338 mm.

[0327] 31 , the upper limit of the second length L2, L2ma (unit: mm), that satisfies the third condition above is calculated by the following equation (9) using the third length L3: Here, for example, the number of photovoltaic strings 30 along the +Y direction as the first direction is N1s, and the upper limit of the second interval I2 is 4 mm.

[0328] L2ma=(L3×N1s)+4×(N1s−1)+(L3 / 2) (9).

[0329] Specifically, for one specific example of the fourth power generation body 10D in Figure 31, the number N1s of solar cell strings 30 along the +Y direction as the first direction is 4, and the third length L3 is 182 mm, so the upper limit L2ma of the second length L2 is calculated to be 831 mm.

[0330] 31 , the lower limit L2mi (unit: mm) of the second length L2 that satisfies the third condition above is calculated by the following formula (10) using the number N1s of the solar cell strings 30 along the +Y direction as the first direction and the third length L3. Here, for example, the lower limit of the second interval I2 is set to 1.5 mm, and the lower limits of each of the third distance D3 and the fourth distance D4 are set to 8 mm.

[0331] L2mi=(L3×N1s)+1.5×(N1s−1)+8×2 (10).

[0332] Specifically, for one specific example of the fourth power generation body 10D in Figure 31, the number N1s of solar cell strings 30 along the +Y direction as the first direction is 4, and the third length L3 is 182 mm, so the lower limit L2mi of the second length L2 is calculated to be 748.5 mm.

[0333] <<Upper and Lower Limits of First Length and Second Length>> Therefore, the fourth power generating body 10D can be realized if the first length L1 is 1338 mm to 1397 mm and the second length L2 is 749 mm to 831 mm. In other words, for example, if the power generating body 10 satisfies the dimensional condition (also referred to as the second dimensional condition) that the first length L1 is 1338 mm to 1397 mm and the second length L2 is 749 mm to 831 mm, the fourth power generating body 10D can be realized.

[0334] Here, the first dimensional condition described in the first embodiment is compared with the second dimensional condition. The first dimensional condition and the second dimensional condition overlap in the range where the first length L1 is 1,338 mm to 1,377 mm and the second length L2 is 778 mm to 804 mm. Therefore, for example, the first length L1 may be 1,338 mm to 1,377 mm and the second length L2 may be 778 mm to 804 mm. In this case, the first power generating body 10A, the second power generating body 10B, the third power generating body 10C, and the fourth power generating body 10D can each be realized for power generating bodies 10 having the same size when the first surface 1f is viewed in a plan view. In other words, in a power generating body 10 having a first length L1 and a second length L2, when the arrangement of the multiple solar cell cells 31 is the first arrangement described above, the first condition described above and the second condition described above are satisfied, and when the arrangement of the multiple solar cell cells 31 is the second arrangement described above, the third condition described above and the fourth condition described above are satisfied.

[0335] <<Specific Examples of First Length and Second Length>> Here, for example, a configuration is possible in which the first length L1 is 1,362 mm and the second length L2 is 791 mm. It is also possible to set each of the first interval I1 and the second interval I2 to 2.5 mm, which is between the upper limit of 4 mm and the lower limit of 1.5 mm. In this case, for example, in one specific example of the fourth power generating body 10D in Figure 31, a configuration can be realized in which the first distance D1 and the second distance D2 are each 27.75 mm, and the third distance D3 and the fourth distance D4 are each 14 mm.

[0336] 2-1-3. Effects of the Solar Cell Module According to the Second Embodiment For example, a case is assumed in which the first length L1 is 1338 mm to 1377 mm and the second length L2 is 778 mm to 804 mm. In this case,...

Claims

1. A power generating body, the power generating body having a first protective member having a flat or sheet-like translucency, a flat or sheet-like second protective member, a solar cell unit, and a sealing material, the first protective member having a first surface and a second surface opposite to the first surface, the second protective member having a third surface facing the second surface and a fourth surface opposite to the third surface, the solar cell unit including a plurality of solar cells positioned in a matrix along the second surface in a gap between the first protective member and the second protective member, the sealing material being positioned in a state of sealing the solar cell unit in the gap, when the first surface is viewed in a plane, the power generating body has a rectangular shape having a first long side and a second long side opposing each other in a first direction and a first short side and a second short side opposing each other in a second direction, each of the first long side and the second long side being positioned along the second direction, when the first surface is viewed in a planar view, the power generating body has a first length of 1316 mm to 1377 mm along the second direction, each of the first short side and the second short side is located along the first direction, when the first surface is viewed in a planar view, the power generating body has a second length of 778 mm to 804 mm along the first direction, when the plurality of solar cells is viewed in a planar view from the first surface side, each of the plurality of solar cells has a rectangular shape having a third long side and a fourth long side, and a third short side and a fourth short side, when the plurality of solar cells is viewed in a planar view from the first surface side, each of the plurality of solar cells has a third length in a direction along each of the third long side and the fourth long side and a fourth length in a direction along each of the third short side and the fourth short side, the solar cell section includes a plurality of solar cell strings, a plurality of first wiring members, and a plurality of second wiring members,each of the plurality of solar cell strings has two or more solar cells arranged along a third direction along each of the third short side and the fourth short side of the plurality of solar cells, and a plurality of third wiring members electrically connecting each two adjacent solar cells of the two or more solar cells, thereby electrically connecting the two or more solar cells in series; each of the plurality of first wiring members electrically connects two adjacent solar cell strings of the plurality of solar cell strings; the plurality of second wiring members includes a first second wiring member electrically connected to a solar cell string located at an end of the plurality of solar cell strings in the fourth direction in which the plurality of solar cell strings are arranged, and a second second wiring member electrically connected to a solar cell string located at an end of the plurality of solar cell strings in a direction opposite to the fourth direction; when the plurality of solar cell strings are viewed in plan from the first surface side, in each of the plurality of solar cell strings, each of the plurality of third wiring members is located along the third direction, and a distance in the third direction between two adjacent solar cell cells of the two or more solar cells is a first distance; a solar cell module, wherein, when the first surface is viewed in a planar view, a distance between the first long side and the solar cell unit in the first direction is a first distance, a distance between the solar cell unit and the second long side in the first direction is a second distance, a distance between the first short side and the solar cell unit in the second direction is a third distance, and a distance between the solar cell unit and the second short side in the second direction is a fourth distance; an arrangement of the plurality of solar cell cells is a first arrangement in which the third long side and the fourth long side of each of the plurality of solar cell cells are positioned along the second direction and the third short side and the fourth short side of each of the plurality of solar cell cells are positioned along the first direction; a first condition is satisfied in which a sum of the first distance and the second distance is less than half the fourth length; and a second condition is satisfied in which a sum of the third distance and the fourth distance is less than half the third length.

2. A power generating body, the power generating body having a first protective member having a flat or sheet-like translucency, a flat or sheet-like second protective member, a solar cell unit, and a sealing material, the first protective member having a first surface and a second surface opposite to the first surface, the second protective member having a third surface facing the second surface and a fourth surface opposite to the third surface, the solar cell unit including a plurality of solar cells positioned in a matrix along the second surface in a gap between the first protective member and the second protective member, the sealing material being positioned in a state sealing the solar cell unit in the gap, when the first surface is viewed in a plane, the power generating body has a rectangular shape having a first long side and a second long side opposing each other in a first direction and a first short side and a second short side opposing each other in a second direction, each of the first long side and the second long side being positioned along the second direction, when the first surface is viewed in a planar view, the power generating body has a first length of 1338 mm to 1377 mm along the second direction, each of the first short side and the second short side is located along the first direction, when the first surface is viewed in a planar view, the power generating body has a second length of 778 mm to 804 mm along the first direction, when the plurality of solar cells is viewed in a planar view from the first surface side, each of the plurality of solar cells has a rectangular shape having a third long side and a fourth long side, and a third short side and a fourth short side, when the plurality of solar cells is viewed in a planar view from the first surface side, each of the plurality of solar cells has a third length in a direction along each of the third long side and the fourth long side and a fourth length in a direction along each of the third short side and the fourth short side, the solar cell section includes a plurality of solar cell strings, a plurality of first wiring members, and a plurality of second wiring members,each of the plurality of solar cell strings has two or more solar cells arranged along a third direction along each of the third short side and the fourth short side of the plurality of solar cells, and a plurality of third wiring members electrically connecting each two adjacent solar cells of the two or more solar cells, thereby electrically connecting the two or more solar cells in series; each of the plurality of first wiring members electrically connects two adjacent solar cell strings of the plurality of solar cell strings; the plurality of second wiring members includes a first second wiring member electrically connected to a solar cell string located at an end of the plurality of solar cell strings in the fourth direction in which the plurality of solar cell strings are arranged, and a second second wiring member electrically connected to a solar cell string located at an end of the plurality of solar cell strings in a direction opposite to the fourth direction; when the plurality of solar cell strings are viewed in plan from the first surface side, in each of the plurality of solar cell strings, each of the plurality of third wiring members is located along the third direction, and a distance in the third direction between two adjacent solar cell cells of the two or more solar cells is a first distance; when the first surface is viewed in a plan view, a distance between the first long side and the solar cell unit in the first direction is a first distance, a distance between the solar cell unit and the second long side in the first direction is a second distance, a distance between the first short side and the solar cell unit in the second direction is a third distance, and a distance between the solar cell unit and the second short side in the second direction is a fourth distance; when the arrangement of the plurality of solar cell cells is a first arrangement in which the third long side and the fourth long side of each of the plurality of solar cell cells are positioned along the second direction and the third short side and the fourth short side of each of the plurality of solar cell cells are positioned along the first direction, a first condition is satisfied that the sum of the first distance and the second distance is less than half the fourth length, and a second condition is satisfied that the sum of the third distance and the fourth distance is less than half the third length,When the arrangement of the multiple solar cell is a second arrangement in which the third long side and the fourth long side of each of the multiple solar cell are positioned along the first direction and the third short side and the fourth short side of each of the multiple solar cell are positioned along the second direction, the solar cell module satisfies a third condition that the sum of the first distance and the second distance is less than half the third length, and satisfies a fourth condition that the sum of the third distance and the fourth distance is less than half the fourth length.

3. A power generating body, the power generating body having a first protective member having a flat or sheet-like translucency, a flat or sheet-like second protective member, a solar cell unit, and a sealing material, the first protective member having a first surface and a second surface opposite to the first surface, the second protective member having a third surface facing the second surface and a fourth surface opposite to the third surface, the solar cell unit including a plurality of solar cells positioned in a matrix along the second surface in a gap between the first protective member and the second protective member, the sealing material being positioned in a state of sealing the solar cell unit in the gap, when the first surface is viewed in a plane, the power generating body has a rectangular shape having a first long side and a second long side opposing each other in a first direction and a first short side and a second short side opposing each other in a second direction, each of the first long side and the second long side being positioned along the second direction, when the first surface is viewed in a planar view, the power generating body has a first length of 1420 mm to 1471 mm along the second direction, each of the first short side and the second short side is located along the first direction, when the first surface is viewed in a planar view, the power generating body has a second length of 1153 mm to 1185 mm along the first direction, when the plurality of solar cells is viewed in a planar view from the first surface side, each of the plurality of solar cells has a rectangular shape having a third long side and a fourth long side, and a third short side and a fourth short side, when the plurality of solar cells is viewed in a planar view from the first surface side, each of the plurality of solar cells has a third length in a direction along each of the third long side and the fourth long side and a fourth length in a direction along each of the third short side and the fourth short side, the solar cell section includes a plurality of solar cell strings, a plurality of first wiring members, and a plurality of second wiring members,each of the plurality of solar cell strings has two or more solar cells arranged along a third direction along each of the third short side and the fourth short side of the plurality of solar cells, and a plurality of third wiring members electrically connecting each two adjacent solar cells of the two or more solar cells, thereby electrically connecting the two or more solar cells in series; each of the plurality of first wiring members electrically connects two adjacent solar cell strings of the plurality of solar cell strings; the plurality of second wiring members includes a first second wiring member electrically connected to a solar cell string located at an end of the plurality of solar cell strings in the fourth direction in which the plurality of solar cell strings are arranged, and a second second wiring member electrically connected to a solar cell string located at an end of the plurality of solar cell strings in a direction opposite to the fourth direction; when the plurality of solar cell strings are viewed in plan from the first surface side, in each of the plurality of solar cell strings, each of the plurality of third wiring members is located along the third direction, and a distance in the third direction between two adjacent solar cell cells of the two or more solar cells is a first distance; a solar cell module, wherein, when the first surface is viewed in a planar view, a distance between the first long side and the solar cell unit in the first direction is a first distance, a distance between the solar cell unit and the second long side in the first direction is a second distance, a distance between the first short side and the solar cell unit in the second direction is a third distance, and a distance between the solar cell unit and the second short side in the second direction is a fourth distance; an arrangement of the plurality of solar cell cells is a second arrangement in which the third long side and the fourth long side of each of the plurality of solar cell cells are positioned along the first direction and the third short side and the fourth short side of each of the plurality of solar cell cells are positioned along the second direction; a third condition is satisfied in which the sum of the first distance and the second distance is less than half the third length; and a fourth condition is satisfied in which the sum of the third distance and the fourth distance is less than half the fourth length.

4. A solar cell module according to any one of claims 1 to 3, wherein each of the plurality of solar cells includes a semiconductor substrate having a first substrate surface located on the first protective member side, a second substrate surface opposite to the first substrate surface, a first substrate side surface connecting the first substrate surface and the second substrate surface, and a second substrate side surface connecting the first substrate surface and the second substrate surface on the opposite side to the first substrate side surface, wherein the first substrate side surface and the second substrate side surface are located along directions along the third long side and the fourth long side, respectively, when the first substrate side surface is located along the fourth long side, the second substrate side surface is located along the third long side, and when the first substrate side surface is located along the third long side, the second substrate side surface is located along the fourth long side, each of the plurality of solar cells has an insulating layer covering the first substrate side surface, and in each of the plurality of solar cells, the second substrate side surface is exposed to the outside of the solar cell.

5. A solar cell module as described in claim 1 or 2, wherein each of one or more of the plurality of solar cells includes a semiconductor substrate having a first substrate surface located on the first protective member side, a second substrate surface opposite the first substrate surface, a first substrate side surface connecting the first substrate surface and the second substrate surface, and a second substrate side surface connecting the first substrate surface and the second substrate surface on the opposite side to the first substrate side surface, each of the first substrate side surface and the second substrate side surface being located along a direction along each of the third long side and the fourth long side, and each of the one or more solar cell, each of the first substrate side surface and the second substrate side surface being exposed to the outside of the solar cell.

6. A solar cell module as described in any one of claims 1 to 5, wherein the third length is the standard length of the solar cell in a direction along one side of the solar cell when the rectangular light receiving surface of the solar cell is viewed in a plan view.

7. A solar cell module as described in claim 6, wherein the standard length includes any one of a first standard length of 200 mm or more, a second standard length shorter than the first standard length, and a third standard length longer than the second standard length and shorter than the first standard length.

8. A solar cell module according to claim 7, wherein the first standard length is 210 mm, the second standard length is 158.75 mm, and the third standard length is 182 mm.

9. A solar cell system comprising a plurality of solar cell modules as defined in claim 7 or claim 8, the plurality of solar cell modules being electrically connected in series, the plurality of solar cell modules including two or more types of solar cell modules selected from a first type, a second type and a third type, when the plurality of solar cell modules includes the first type of solar cell module, the third length of each of the plurality of solar cell cells in the first type of solar cell module is the length of the first standard, when the plurality of solar cell modules includes the second type of solar cell module, the third length of each of the plurality of solar cell cells in the second type of solar cell module is the length of the second standard, when the plurality of solar cell modules includes the third type of solar cell module, the third length of each of the plurality of solar cell cells in the third type of solar cell module is the length of the third standard, the plurality of solar cell modules including a first number of solar cell modules and a remaining second number of solar cell modules less than the first number, the first output of each of the first number of solar cell modules being smaller than the second output of each of the second number of solar cell modules, A solar cell device, wherein each of the first number of solar cell modules is one type of solar cell module selected from the first type of solar cell modules, the second type of solar cell modules, and the third type of solar cell modules, and each of the second number of solar cell modules is another type of solar cell module different from the one type of solar cell module selected from the first type of solar cell modules, the second type of solar cell modules, and the third type of solar cell modules.

10. A method for manufacturing a solar cell module including a power generating body, the power generating body having a first protective member having a flat or sheet-like translucency, a flat or sheet-like second protective member, a solar cell unit, and a sealing material, the first protective member having a first surface and a second surface opposite to the first surface, the second protective member having a third surface facing the second surface and a fourth surface opposite to the third surface, the solar cell unit including a plurality of solar cell cells positioned in a matrix along the second surface in a gap between the first protective member and the second protective member, the sealing material being positioned in a state of sealing the solar cell unit in the gap, when the first surface is viewed in a plane, the power generating body has a rectangular shape having a first long side and a second long side opposing each other in a first direction and a first short side and a second short side opposing each other in a second direction, each of the first long side and the second long side being positioned along the second direction, when the first surface is viewed in a planar view, the power generating body has a first length along the second direction, each of the first short side and the second short side are positioned along the first direction, when the first surface is viewed in a planar view, the power generating body has a second length along the first direction, when the plurality of solar cells are viewed in a planar view from the first surface side, each of the plurality of solar cells has a rectangular shape having a third long side and a fourth long side, and a third short side and a fourth short side, when the plurality of solar cells are viewed in a planar view from the first surface side, each of the plurality of solar cells has a third length in a direction along each of the third long side and the fourth long side, and a fourth length in a direction along each of the third short side and the fourth short side, the solar cell section includes a plurality of solar cell strings, a plurality of first wiring members, and a plurality of second wiring members,each of the plurality of solar cell strings has two or more solar cells arranged along a third direction along each of the third short side and the fourth short side of the plurality of solar cells, and a plurality of third wiring members electrically connecting each two adjacent solar cells of the two or more solar cells, thereby electrically connecting the two or more solar cells in series; each of the plurality of first wiring members electrically connects two adjacent solar cell strings of the plurality of solar cell strings; the plurality of second wiring members includes a first second wiring member electrically connected to a solar cell string located at an end of the plurality of solar cell strings in the fourth direction in which the plurality of solar cell strings are arranged, and a second second wiring member electrically connected to a solar cell string located at an end of the plurality of solar cell strings in a direction opposite to the fourth direction; when the plurality of solar cell strings are viewed in plan from the first surface side, in each of the plurality of solar cell strings, each of the plurality of third wiring members is located along the third direction, and a distance in the third direction between two adjacent solar cell cells of the two or more solar cells is a first distance; When the first surface is viewed in a plan view, a distance between the first long side and the solar cell unit in the first direction is a first distance, a distance between the solar cell unit and the second long side in the first direction is a second distance, a distance between the first short side and the solar cell unit in the second direction is a third distance, and a distance between the solar cell unit and the second short side in the second direction is a fourth distance; and a manufacturing method of the solar cell module includes: a first step of setting the first length and the second length; a second step of preparing, as each of the plurality of solar cells, one type of solar cell among a plurality of types of solar cell including a first type of solar cell, a second type of solar cell, and a third type of solar cell;and a third step of producing the power generating body using the first protective member and the second protective member corresponding to the first length and the second length set in the first step and the plurality of solar cells prepared in the second step, wherein even if any one type of solar cell among the plurality of types of solar cell is used as each of the plurality of solar cells in the first step, the first length and the second length are set such that, when the arrangement of the plurality of solar cells in the state of the power generating body is a first arrangement in which each of the third long sides and the fourth long sides of each of the plurality of solar cells are positioned along the second direction and each of the third short sides and the fourth short sides of each of the plurality of solar cells are positioned along the first direction, a first condition that the sum of the first distance and the second distance is less than half the fourth length and a second condition that the sum of the third distance and the fourth distance is less than half the third length are satisfied, In the third step, when the arrangement of the multiple solar cells in the power generating body is the first arrangement, the power generating body is produced in a form that satisfies the first condition and the second condition, the first type of solar cell has a rectangular first light receiving surface, the second type of solar cell has a rectangular second light receiving surface, the third type of solar cell has a rectangular third light receiving surface, when the first light receiving surface is viewed in a plan view, the first type of solar cell has a thirdA long side and a fourthA long side, a thirdA short side and a fourthA short side, and has a thirdA length that is a first standard length in a direction along each of the thirdA long side and the fourthA long side, When the second light receiving surface is viewed in a plan view, the second type solar cell has a third B long side and a fourth B long side, and a third B short side and a fourth B short side, and has a third B length that is a second standard length different from the first standard length in a direction along each of the third B long side and the fourth B long side,A method for manufacturing a solar cell module, wherein, when the third light receiving surface is viewed in a plane, the third type solar cell has a third C long side and a fourth C long side, and a third C short side and a fourth C short side, and has a third C length, which is a third standard length different from the first standard length and the second standard length, in a direction along each of the third C long side and the fourth C long side.

11. A method for manufacturing a solar cell module according to claim 10, wherein the first length is between 1316 mm and 1377 mm, and the second length is between 778 mm and 804 mm.

12. A method for manufacturing a solar cell module as described in claim 10, wherein in the first step, even if any one type of solar cell among the multiple types of solar cells is used as each of the multiple solar cells, when the arrangement of the multiple solar cells in the state of the power generating body is the first arrangement, the first condition and the second condition are satisfied, and when one type of solar cell among the multiple types of solar cells is used as each of the multiple solar cells, when the arrangement of the multiple solar cells in the state of the power generating body is the second arrangement in which each of the third long sides and the fourth long sides of each of the multiple solar cells are positioned along the first direction and each of the third short sides and the fourth short sides of each of the multiple solar cells are positioned along the second direction, the first length and the second length are set such that they satisfy a third condition that the sum of the first distance and the second distance is less than half the third length and a fourth condition that the sum of the third distance and the fourth distance is less than half the fourth length; A method for manufacturing a solar cell module, wherein in the third step, when the arrangement of the multiple solar cells in the power generating body is the second arrangement, the power generating body is produced in a form that satisfies the third condition and the fourth condition.

13. A method for manufacturing a solar cell module according to claim 12, wherein the first length is between 1338 mm and 1377 mm, and the second length is between 778 mm and 804 mm.

14. A method for manufacturing a solar cell module according to any one of claims 10 to 13, wherein the multiple types of solar cell include a fourth type of solar cell, the fourth type of solar cell having a rectangular fourth light receiving surface, and when the fourth light receiving surface is viewed in a plan view, the fourth type of solar cell has a third D long side and a fourth D long side, and a third D short side and a fourth D short side, and has a third D length that is any one of the first standard length, the second standard length and the third standard length in a direction along each of the third D long side and the fourth D long side, a plurality of solar cells of the fourth type each having a light receiving surface of the first standard size, each of the first or more first standard solar cells being divided into three in a direction along one side of the light receiving surface of the first standard size in order to prepare a plurality of solar cells of the fourth type; a plurality of solar cells of the fourth type each having a light receiving surface of the second standard size, each of the second or more second standard solar cells being divided into three in a direction along one side of the light receiving surface of the second standard size in order to prepare a plurality of solar cells of the fourth type; and a plurality of solar cells of the fourth type each having a light receiving surface of the third standard size, each of the third or more third standard solar cells being divided into three in a direction along one side of the light receiving surface of the third standard size in order to prepare a plurality of solar cells of the fourth type.

15. A method for manufacturing a solar cell module including a power generating body, the power generating body having a first protective member having a flat or sheet-like translucency, a flat or sheet-like second protective member, a solar cell unit, and a sealing material, the first protective member having a first surface and a second surface opposite to the first surface, the second protective member having a third surface facing the second surface and a fourth surface opposite to the third surface, the solar cell unit including a plurality of solar cell cells positioned in a matrix along the second surface in a gap between the first protective member and the second protective member, the sealing material being positioned in a state of sealing the solar cell unit in the gap, when the first surface is viewed in a plane, the power generating body has a rectangular shape having a first long side and a second long side opposing each other in a first direction and a first short side and a second short side opposing each other in a second direction, each of the first long side and the second long side being positioned along the second direction, when the first surface is viewed in a planar view, the power generating body has a first length along the second direction, each of the first short side and the second short side are positioned along the first direction, when the first surface is viewed in a planar view, the power generating body has a second length along the first direction, when the plurality of solar cells are viewed in a planar view from the first surface side, each of the plurality of solar cells has a rectangular shape having a third long side and a fourth long side, and a third short side and a fourth short side, when the plurality of solar cells are viewed in a planar view from the first surface side, each of the plurality of solar cells has a third length in a direction along each of the third long side and the fourth long side, and a fourth length in a direction along each of the third short side and the fourth short side, the solar cell section includes a plurality of solar cell strings, a plurality of first wiring members, and a plurality of second wiring members,each of the plurality of solar cell strings has two or more solar cells arranged along a third direction along each of the third short side and the fourth short side of the plurality of solar cells, and a plurality of third wiring members electrically connecting each two adjacent solar cells of the two or more solar cells, thereby electrically connecting the two or more solar cells in series; each of the plurality of first wiring members electrically connects two adjacent solar cell strings of the plurality of solar cell strings; the plurality of second wiring members includes a first second wiring member electrically connected to a solar cell string located at an end of the plurality of solar cell strings in the fourth direction in which the plurality of solar cell strings are arranged, and a second second wiring member electrically connected to a solar cell string located at an end of the plurality of solar cell strings in a direction opposite to the fourth direction; when the plurality of solar cell strings are viewed in plan from the first surface side, in each of the plurality of solar cell strings, each of the plurality of third wiring members is located along the third direction, and a distance in the third direction between two adjacent solar cell cells of the two or more solar cells is a first distance; When the first surface is viewed in a plan view, a distance between the first long side and the solar cell unit in the first direction is a first distance, a distance between the solar cell unit and the second long side in the first direction is a second distance, a distance between the first short side and the solar cell unit in the second direction is a third distance, and a distance between the solar cell unit and the second short side in the second direction is a fourth distance; and a manufacturing method of the solar cell module includes: a first step of setting the first length and the second length; a second step of preparing, as each of the plurality of solar cells, one type of solar cell among a plurality of types of solar cell including a first type of solar cell, a second type of solar cell, and a third type of solar cell;and a third step of producing the power generating body using the first protective member and the second protective member corresponding to the first length and the second length set in the first step and the plurality of solar cells prepared in the second step, wherein even if any one type of solar cell among the plurality of types of solar cells is used as each of the plurality of solar cells in the first step, the first length and the second length are set so as to satisfy a third condition that the sum of the first distance and the second distance is less than half the third length and a fourth condition that the sum of the third distance and the fourth distance is less than half the fourth length when the arrangement of the plurality of solar cells in the state of the power generating body is a second arrangement in which the third long side and the fourth long side of each of the plurality of solar cells are positioned along the first direction and the third short side and the fourth short side of each of the plurality of solar cells are positioned along the second direction, In the third step, when the arrangement of the multiple solar cells in the power generating body is the second arrangement, the power generating body is produced in a form that satisfies the third condition and the fourth condition, the first type of solar cell has a rectangular first light receiving surface, the second type of solar cell has a rectangular second light receiving surface, the third type of solar cell has a rectangular third light receiving surface, when the first light receiving surface is viewed in a plan view, the first type of solar cell has a thirdA long side and a fourthA long side, a thirdA short side and a fourthA short side, and has a thirdA length that is a first standard length in a direction along each of the thirdA long side and the fourthA long side, When the second light receiving surface is viewed in a plan view, the second type solar cell has a third B long side and a fourth B long side, and a third B short side and a fourth B short side, and has a third B length that is a second standard length different from the first standard length in a direction along each of the third B long side and the fourth B long side,A method for manufacturing a solar cell module, wherein, when the third light receiving surface is viewed in a plane, the third type solar cell has a third C long side and a fourth C long side, and a third C short side and a fourth C short side, and has a third C length, which is a third standard length different from the first standard length and the second standard length, in a direction along each of the third C long side and the fourth C long side.

16. A method for manufacturing a solar cell module according to claim 15, wherein the first length is between 1420 mm and 1471 mm, and the second length is between 1153 mm and 1185 mm.

17. A method for manufacturing a solar cell module according to any one of claims 10 to 16, wherein the length of the first standard is 200 mm or more, the length of the second standard is shorter than the length of the first standard, and the length of the third standard is longer than the length of the second standard and shorter than the length of the first standard.

18. A method for manufacturing a solar cell module according to any one of claims 10 to 17, wherein in the second step, when the first type of solar cell is prepared as each of the plurality of solar cells, one or more first-standard solar cells each having a light-receiving surface of a first standard size are each divided into two in a direction along one side of the light-receiving surface of the first standard size to prepare a plurality of the first type of solar cell; when the second type of solar cell is prepared as each of the plurality of solar cells, one or more second-standard solar cells each having a light-receiving surface of a second standard size are each divided into two in a direction along one side of the light-receiving surface of the second standard size to prepare a plurality of the second type of solar cell; A method for manufacturing a solar cell module, in which, when the third type solar cell is prepared as each of the plurality of solar cells, the plurality of third type solar cells are prepared by dividing one or more third standard solar cells, each having a light receiving surface of a third standard size, into two in a direction along one side of the light receiving surface of the third standard size.

19. A method for manufacturing a solar cell module as defined in claim 14 or claim 18, wherein the light-receiving surface of the first standard size is a square surface having a length along each of a first pair of opposing sides and a length along each of a second pair of opposing sides of 210 mm each; the light-receiving surface of the second standard size is a square surface having a length along each of a first pair of opposing sides and a length along each of a second pair of opposing sides of 158.75 mm each; and the light-receiving surface of the third standard size is a square surface having a length along each of a first pair of opposing sides and a length along each of a second pair of opposing sides of 182 mm each.

20. A power generating body, the power generating body having a first protective member having a flat or sheet-like translucency, a flat or sheet-like second protective member, a solar cell unit, and a sealing material, the first protective member having a first surface and a second surface opposite to the first surface, the second protective member having a third surface facing the second surface and a fourth surface opposite to the third surface, the solar cell unit including a plurality of solar cells positioned in a matrix along the second surface in a gap between the first protective member and the second protective member, the sealing material being positioned in a state of sealing the solar cell unit in the gap, when the first surface is viewed in a plane, the power generating body has a rectangular shape having a first long side and a second long side opposing each other in a first direction and a first short side and a second short side opposing each other in a second direction, each of the first long side and the second long side being positioned along the second direction, when the first surface is viewed in a planar view, the power generating body has a first length along the second direction, each of the first short side and the second short side is located along the first direction, when the first surface is viewed in a planar view, the power generating body has a second length along the first direction, when the plurality of solar cells is viewed in a planar view from the first surface side, each of the plurality of solar cells has a rectangular shape having a third long side and a fourth long side and a third short side and a fourth short side, when the plurality of solar cells is viewed in a planar view from the first surface side, each of the plurality of solar cells has a third length in a direction along each of the third long side and the fourth long side and a fourth length in a direction along each of the third short side and the fourth short side, each of the plurality of solar cells is composed of any one type of solar cell selected from a plurality of types of solar cells including a first type of solar cell, a second type of solar cell and a third type of solar cell, the solar cell section includes a plurality of solar cell strings, a plurality of first wiring members, and a plurality of second wiring members;each of the plurality of solar cell strings has two or more solar cells arranged along a third direction along each of the third short side and the fourth short side of the plurality of solar cells, and a plurality of third wiring members electrically connecting each two adjacent solar cells of the two or more solar cells, thereby electrically connecting the two or more solar cells in series; each of the plurality of first wiring members electrically connects two adjacent solar cell strings of the plurality of solar cell strings; the plurality of second wiring members includes a first second wiring member electrically connected to a solar cell string located at an end of the plurality of solar cell strings in the fourth direction in which the plurality of solar cell strings are arranged, and a second second wiring member electrically connected to a solar cell string located at an end of the plurality of solar cell strings in a direction opposite to the fourth direction; when the plurality of solar cell strings are viewed in plan from the first surface side, in each of the plurality of solar cell strings, each of the plurality of third wiring members is located along the third direction, and a distance in the third direction between two adjacent solar cell cells of the two or more solar cells is a first distance; When the first surface is viewed in a plan view, a distance between the first long side and the solar cell unit in the first direction is a first distance, a distance between the solar cell unit and the second long side in the first direction is a second distance, a distance between the first short side and the solar cell unit in the second direction is a third distance, and a distance between the solar cell unit and the second short side in the second direction is a fourth distance; when the arrangement of the plurality of solar cell cells is a first arrangement in which the third long side and the fourth long side of each of the plurality of solar cell cells are positioned along the second direction and the third short side and the fourth short side of each of the plurality of solar cell cells are positioned along the first direction, a first condition is satisfied that the sum of the first distance and the second distance is less than half the fourth length, and a second condition is satisfied that the sum of the third distance and the fourth distance is less than half the third length,the first type of solar cell has a rectangular first light receiving surface, the second type of solar cell has a rectangular second light receiving surface, the third type of solar cell has a rectangular third light receiving surface, when the first light receiving surface is viewed in a planar view, the first type of solar cell has a thirdA long side and a fourthA long side, and a thirdA short side and a fourthA short side, and has a thirdA length that is a first standard length in a direction along each of the thirdA long side and the fourthA long side, when the second light receiving surface is viewed in a planar view, the second type of solar cell has a thirdB long side and a fourthB long side, and a thirdB short side and a fourthB short side, and has a thirdB length that is a second standard length different from the first standard length in a direction along each of the thirdB long side and the fourthB long side, A solar cell module in which, when the third light receiving surface is viewed in a plane, the third type solar cell has a third C long side and a fourth C long side, and a third C short side and a fourth C short side, and has a third C length, which is a third standard length different from the first standard length and the second standard length, in a direction along each of the third C long side and the fourth C long side.

21. A solar cell module according to claim 20, wherein the first length is between 1316 mm and 1377 mm, and the second length is between 778 mm and 804 mm.

22. A solar cell module as described in claim 20, wherein when the arrangement of the plurality of solar cell cells is a second arrangement in which each of the third long sides and the fourth long sides of each of the plurality of solar cell cells is positioned along the first direction and each of the third short sides and the fourth short sides of each of the plurality of solar cell cells is positioned along the second direction, the solar cell module satisfies a third condition that the sum of the first distance and the second distance is less than half the third length, and a fourth condition that the sum of the third distance and the fourth distance is less than half the fourth length.

23. The solar cell module according to claim 22, wherein the first length is between 1338 mm and 1377 mm, and the second length is between 778 mm and 804 mm.

24. A solar cell module according to any one of claims 20 to 23, wherein the multiple types of solar cells include a fourth type of solar cell, and the fourth type of solar cell has a rectangular fourth light-receiving surface, and when the fourth light-receiving surface is viewed in a plan view, the fourth type of solar cell has a third D long side and a fourth D long side, and a third D short side and a fourth D short side, and has a third D length that is any one of the first standard length, the second standard length, and the third standard length in a direction along each of the third D long side and the fourth D long side, and when the third D length is the first standard length, the fourth type of solar cell includes a solar cell produced by dividing a first standard solar cell having a light-receiving surface of a first standard size into three in a direction along one side of the light-receiving surface of the first standard size, A solar cell module, wherein, when the third D length is the length of the second standard, the fourth type of solar cell includes a solar cell manufactured by dividing a second standard solar cell having a light receiving surface of the second standard size into three in a direction along one side of the light receiving surface of the second standard size, and when the third D length is the length of the third standard, the fourth type of solar cell includes a solar cell manufactured by dividing a third standard solar cell having a light receiving surface of the third standard size into three in a direction along one side of the light receiving surface of the third standard size.

25. A power generating body, the power generating body having a first protective member having a flat or sheet-like translucency, a flat or sheet-like second protective member, a solar cell unit, and a sealing material, the first protective member having a first surface and a second surface opposite to the first surface, the second protective member having a third surface facing the second surface and a fourth surface opposite to the third surface, the solar cell unit including a plurality of solar cells positioned in a matrix along the second surface in a gap between the first protective member and the second protective member, the sealing material being positioned in a state of sealing the solar cell unit in the gap, when the first surface is viewed in a plane, the power generating body has a rectangular shape having a first long side and a second long side opposing each other in a first direction and a first short side and a second short side opposing each other in a second direction, each of the first long side and the second long side being positioned along the second direction, when the first surface is viewed in a planar view, the power generating body has a first length along the second direction, each of the first short side and the second short side is located along the first direction, when the first surface is viewed in a planar view, the power generating body has a second length along the first direction, when the plurality of solar cells is viewed in a planar view from the first surface side, each of the plurality of solar cells has a rectangular shape having a third long side and a fourth long side and a third short side and a fourth short side, when the plurality of solar cells is viewed in a planar view from the first surface side, each of the plurality of solar cells has a third length in a direction along each of the third long side and the fourth long side and a fourth length in a direction along each of the third short side and the fourth short side, each of the plurality of solar cells is composed of any one type of solar cell selected from a plurality of types of solar cells including a first type of solar cell, a second type of solar cell and a third type of solar cell, the solar cell section includes a plurality of solar cell strings, a plurality of first wiring members, and a plurality of second wiring members;each of the plurality of solar cell strings has two or more solar cells arranged along a third direction along each of the third short side and the fourth short side of the plurality of solar cells, and a plurality of third wiring members electrically connecting each two adjacent solar cells of the two or more solar cells, thereby electrically connecting the two or more solar cells in series; each of the plurality of first wiring members electrically connects two adjacent solar cell strings of the plurality of solar cell strings; the plurality of second wiring members includes a first second wiring member electrically connected to a solar cell string located at an end of the plurality of solar cell strings in the fourth direction in which the plurality of solar cell strings are arranged, and a second second wiring member electrically connected to a solar cell string located at an end of the plurality of solar cell strings in a direction opposite to the fourth direction; when the plurality of solar cell strings are viewed in plan from the first surface side, in each of the plurality of solar cell strings, each of the plurality of third wiring members is located along the third direction, and a distance in the third direction between two adjacent solar cell cells of the two or more solar cells is a first distance; when the first surface is viewed in a plan view, a distance between the first long side and the solar cell unit in the first direction is a first distance, a distance between the solar cell unit and the second long side in the first direction is a second distance, a distance between the first short side and the solar cell unit in the second direction is a third distance, and a distance between the solar cell unit and the second short side in the second direction is a fourth distance; an arrangement of the plurality of solar cell cells is a second arrangement in which the third long side and the fourth long side of each of the plurality of solar cell cells are positioned along the first direction and the third short side and the fourth short side of each of the plurality of solar cell cells are positioned along the second direction, and a third condition is satisfied in which a sum of the first distance and the second distance is less than half the third length, and a fourth condition is satisfied in which a sum of the third distance and the fourth distance is less than half the fourth length,the first type of solar cell has a rectangular first light receiving surface, the second type of solar cell has a rectangular second light receiving surface, the third type of solar cell has a rectangular third light receiving surface, when the first light receiving surface is viewed in a planar view, the first type of solar cell has a thirdA long side and a fourthA long side, and a thirdA short side and a fourthA short side, and has a thirdA length that is a first standard length in a direction along each of the thirdA long side and the fourthA long side, when the second light receiving surface is viewed in a planar view, the second type of solar cell has a thirdB long side and a fourthB long side, and a thirdB short side and a fourthB short side, and has a thirdB length that is a second standard length different from the first standard length in a direction along each of the thirdB long side and the fourthB long side, A solar cell module in which, when the third light receiving surface is viewed in a plane, the third type solar cell has a third C long side and a fourth C long side, and a third C short side and a fourth C short side, and has a third C length, which is a third standard length different from the first standard length and the second standard length, in a direction along each of the third C long side and the fourth C long side.

26. A solar cell module according to claim 25, wherein the first length is between 1420 mm and 1471 mm, and the second length is between 1153 mm and 1185 mm.

27. A solar cell module according to any one of claims 20 to 26, wherein the length of the first standard is 200 mm or more, the length of the second standard is shorter than the length of the first standard, and the length of the third standard is longer than the length of the second standard and shorter than the length of the first standard.

28. A solar cell module according to any one of claims 20 to 27, wherein the first type of solar cell includes a solar cell produced by dividing a first standard solar cell having a light-receiving surface of a first standard size into two in a direction along one side of the light-receiving surface of the first standard size, the second type of solar cell includes a solar cell produced by dividing a second standard solar cell having a light-receiving surface of a second standard size into two in a direction along one side of the light-receiving surface of the second standard size, and the third type of solar cell includes a solar cell produced by dividing a third standard solar cell having a light-receiving surface of a third standard size into two in a direction along one side of the light-receiving surface of the third standard size.

29. A solar cell module as claimed in claim 24 or claim 28, wherein the light-receiving surface of the first standard size is a square surface having a length along each of a first pair of opposing sides and a length along each of a second pair of opposing sides of 210 mm each; the light-receiving surface of the second standard size is a square surface having a length along each of a first pair of opposing sides and a length along each of a second pair of opposing sides of 158.75 mm each; and the light-receiving surface of the third standard size is a square surface having a length along each of a first pair of opposing sides and a length along each of a second pair of opposing sides of 182 mm each.

30. A solar cell power generating system comprising a plurality of solar cell modules as defined in any one of claims 20 to 29, the plurality of solar cell modules being electrically connected in series, the plurality of solar cell modules including two or more types of solar cell modules selected from a first type, a second type, and a third type, when the plurality of solar cell modules includes the first type of solar cell module, each of the plurality of solar cell cells in the first type of solar cell module is the first type, when the plurality of solar cell modules includes the second type of solar cell module, each of the plurality of solar cell cells in the second type of solar cell module is the second type, when the plurality of solar cell modules includes the third type of solar cell module, each of the plurality of solar cell cells in the third type of solar cell module is the third type, the plurality of solar cell modules including a first number of solar cell modules and a remaining second number of solar cell modules less than the first number, a first output in each of the first number of solar cell modules being smaller than a second output in each of the second number of solar cell modules, A solar cell device, wherein each of the first number of solar cell modules is one type of solar cell module selected from the first type of solar cell modules, the second type of solar cell modules, and the third type of solar cell modules, and each of the second number of solar cell modules is another type of solar cell module different from the one type of solar cell module selected from the first type of solar cell modules, the second type of solar cell modules, and the third type of solar cell modules.

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