Solar panel wiring structure

Abstract

To achieve a solar cell panel wiring structure capable of performing maintenance work of a photovoltaic power generation system from the outdoor side of a building.SOLUTION: A solar cell panel 1 includes a panel body 39 including: a plurality of solar cells; and a positive terminal part and a negative terminal part which are disposed on an indoor surface of the panel body 39 and which are electrically connected to the plurality of solar cells. Of the two solar cell panels 1 arranged side by side in the left and right direction, the positive terminal part included in one solar cell panel 1 and the negative terminal part included in the other solar cell panel 1 are connected via an intermediate connection cable 6 at least partially arranged on the outdoor side rather than the panel body 39.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a wiring structure for solar cell panels that form the outer wall of a building. [Background technology]

[0002] In recent years, in order to realize ZEB (Zero Energy Building), there has been an increasing demand for solar power generation using the outer walls of buildings and other structures. Therefore, it has been considered to use solar cell panels that can convert light energy into electrical energy as panels for the curtain wall that constitutes the outer wall of a building.

[0003] 26 and 27 show a building 101 in which a part of the outer wall is made up of solar cell panels 100, as described in Japanese Patent Application Laid-Open No. 2014-136919.

[0004] The outer perimeter wall of the building 101 is made up of a curtain wall 102. The curtain wall 102 is attached to a floor slab 103 using brackets 104.

[0005] The curtain wall 102 includes a plurality of mullions 105, a plurality of lattice beams 106, a plurality of glass panels 107, and a plurality of solar cell panels 100.

[0006] The glass panel 107 and the solar cell panel 100 are each set into an area surrounded on all four sides by mullions 105 and transoms 106. Of these, the glass panel 107 forms a window and is provided in a portion corresponding to the interior space. In contrast, the solar cell panel 100 forms a wall and is provided in a portion (spandrel portion) corresponding to the attic space and underfloor space.

[0007] The solar cell panel 100 has a panel body 108 and a positive terminal portion and a negative terminal portion (not shown).

[0008] The panel body 108 has a plurality of solar cells, which are connected in series to each other to form a circuit (solar cell module).

[0009] The positive terminal and negative terminal are provided on the indoor surface (rear surface) of the panel body 108 and are electrically connected to both ends of the circuit. The positive terminal and negative terminal are housed in a terminal box 109. The terminal box 109 is disposed in the space between the solar cell panel 100 and the interior wall material 110. A positive current collecting cable 111 is connected to the positive terminal, and a negative current collecting cable 112 is connected to the negative terminal.

[0010] The solar cell panels 100 are connected in series to each other to form a solar cell group. For this purpose, of two solar cell panels 100 arranged adjacent to each other in the left-right direction, the positive current collecting cable 111 of one solar cell panel 100 and the negative current collecting cable 112 of the other solar cell panel 100 are each drawn out from the space between the solar cell panel 100 and the interior wall material 110 into the indoor space and connected inside a cover (not shown) placed in the indoor space.

[0011] Each solar cell group is connected to a power conditioner installed in the building by a dedicated output cable 113. This allows the power generated by multiple solar cell units to be collected in the power conditioner. The collected power in the power conditioner is converted from DC power to AC power and can be used both inside and outside the building. As a result, the primary energy balance consumed in the building can be brought close to zero, contributing to the realization of ZEB. [Prior art documents] [Patent documents]

[0012] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-136919 Summary of the Invention [Problem to be solved by the invention]

[0013] Maintenance work on solar power generation systems is essential for stable operation of solar power generation over the long term.

[0014] However, in the conventional structure described in JP 2014-136919 A, the solar cell panels 100 belonging to the same solar cell group are connected indoors. Therefore, maintenance work on the solar power generation system cannot be performed from the outside of the building 101, but must be performed from inside the building 101. Specifically, maintenance workers must enter the indoor space to perform their work.

[0015] This may result in an increase in the number of days required for maintenance work, as work hours are likely to be limited to nighttime, holidays, etc. Furthermore, maintenance work requires removing the cover placed inside the interior space, which may damage interior surfaces such as flooring and interior walls.

[0016] In addition, it has been customary to connect the cables of solar panels that make up the outer walls of buildings in the ceiling space or underfloor space. In this case, in addition to the problems that arise with the conventional structure described in JP 2014-136919 A, maintenance workers are forced to work in narrow ceiling spaces or underfloor spaces, which reduces work efficiency. Furthermore, it becomes difficult to distinguish between cables and identify defective locations.

[0017] An object of the present invention is to provide a wiring structure for a solar cell panel that allows maintenance work on a solar power generation system to be performed from the outside of a building. [Means for solving the problem]

[0018] A wiring structure for a solar cell panel according to one aspect of the present invention relates to a wiring structure for a solar cell panel that forms an outer wall of a building. The solar panel has a panel body including a plurality of solar cells, and a positive terminal portion and a negative terminal portion that are arranged on the indoor surface of the panel body and are electrically connected to the plurality of solar cells. Of the two solar cell panels arranged side by side in a predetermined direction, the positive terminal portion of one of the solar cell panels and the negative terminal portion of the other solar cell panel are connected via a connection cable, at least a portion of which is arranged outdoors relative to the panel body.

[0019] In one aspect of the wiring structure of a solar panel according to the present invention, the connection cable can be composed of at least two cables connected via a connector connection portion located outdoors relative to the panel body.

[0020] In the solar cell panel wiring structure according to one aspect of the present invention, the predetermined direction is the left-right direction, and a vertical frame having an insertion portion such as a through hole or a notch can be disposed between the two solar cell panels in the left-right direction. The connection cable can be inserted into the insertion portion of the vertical frame.

[0021] In a solar cell panel wiring structure according to one aspect of the present invention, the predetermined direction is the vertical direction, a glass panel is disposed between the two solar cell panels in the vertical direction, and a vertical frame having an insertion portion such as a through hole or a notch is disposed on one side of the two solar cell panels in the horizontal direction. The connection cable can be inserted into the insertion portion of the vertical frame.

[0022] In one aspect of the wiring structure of a solar panel according to the present invention, the vertical frame has a cable accommodating section extending in the vertical direction on the outdoor side of the panel body, and a portion of the connection cable can be accommodated in the cable accommodating section. In this case, the vertical frame may have a vertical frame body fixed to the framework and a decorative member fixed to the outdoor side of the vertical frame body, and the cable housing may be provided in the decorative member. Alternatively, the cable housing may be provided in the vertical frame body. The vertical frame may also have an openable and closable lid portion that communicates with the cable housing portion.

[0023] In a wiring structure of a solar cell panel according to one aspect of the present invention, the solar cell panel further includes a positive collector cable connected to the positive terminal portion and a negative collector cable connected to the negative terminal portion, and both ends of the connection cable can be connected to the positive collector cable provided on one of the solar cell panels and the negative collector cable provided on the other solar cell panel, respectively.

[0024] In the solar cell panel wiring structure according to one aspect of the present invention, a first connector can be provided at the end of the positive collector cable, and a second connector can be provided at the end of the negative collector cable. Furthermore, of the two ends of the connection cable, one end that connects to the positive collector cable can be equipped with the second connector, and the other end that connects to the negative collector cable can be equipped with the first connector. [Effects of the Invention]

[0025] According to the wiring structure of the solar cell panel according to one aspect of the present invention, maintenance work on the solar power generation system can be performed from the outside of the building. [Brief explanation of the drawings]

[0026] [Figure 1] FIG. 1 is a schematic diagram of a building to which a wiring structure for solar cell panels according to a first embodiment is applied, as viewed from the outside. [Figure 2] FIG. 2 is a vertical cross-sectional view corresponding to the cross section taken along line AA in FIG. [Figure 3] FIG. 3 is a cross-sectional view corresponding to the cross section taken along line BB in FIG. [Figure 4] FIG. 4 is a vertical cross-sectional view corresponding to the cross section taken along line CC in FIG. [Figure 5] FIG. 5 is a partially enlarged view of FIG. [Figure 6] FIG. 6 is a cross-sectional view corresponding to the cross section taken along line DD in FIG. [Figure 7] FIG. 7 is a cross-sectional view corresponding to the cross section taken along line EE in FIG. [Figure 8] FIG. 8 is a cross-sectional view showing the mullion removed from FIG. [Figure 9] FIG. 9 is a side view seen from the right side of FIG. [Figure 10] FIG. 10 is a cross-sectional view showing the main body of the mullion taken out from FIG. [Figure 11] FIG. 11 is a front view of FIG. 10 as seen from the bottom (outdoor side). [Figure 12] FIG. 12 is a side view seen from the left side of FIG. [Figure 13] FIG. 13 is a cross-sectional view showing the decorative material taken out from FIG. [Figure 14] FIG. 14 is a front view of FIG. 13 as seen from the lower side (outdoor side). [Figure 15] FIG. 15 is a schematic diagram of the first example of the embodiment, in which the solar cell panel is taken out and viewed from the front side (outdoor side). [Figure 16] FIG. 16 is a schematic diagram showing the wiring structure of the solar cell panel more specifically than FIG. [Figure 17] FIG. 17 is a partial enlarged view of the middle part in the left-right direction of FIG. [Figure 18] FIG. 18 is a partial enlarged view of one side portion (left side portion) in the left-right direction of FIG. [Figure 19] FIG. 19 is a partial enlarged view of the other side (right side) in the left-right direction of FIG. [Figure 20] FIG. 20 is a diagram corresponding to FIG. 15, showing a second example of the embodiment. [Figure 21]FIG. 21 is a diagram corresponding to FIG. 18 and shows a second example of the embodiment. [Figure 22] FIG. 22 is a diagram corresponding to FIG. 15 and shows a third example of the embodiment. [Figure 23] FIG. 23 is a diagram showing a third example of the embodiment, and corresponds to FIG. [Figure 24] FIG. 24 is a diagram corresponding to FIG. 15 and shows a fourth example of the embodiment. [Figure 25] FIG. 25 is a diagram corresponding to FIG. 18 and shows a fourth example of the embodiment. [Figure 26] FIG. 26 is a schematic diagram showing a building to which a conventional wiring structure for solar cell panels is applied. [Figure 27] FIG. 27 is a cross-sectional view corresponding to the cross section taken along line FF in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0027] [First example of embodiment] A first example of the embodiment will be described with reference to FIGS.

[0028] [Overall structure of the building] 1 shows a building 2, part of whose outer wall is made up of solar cell panels 1 wired using the wiring structure of this embodiment. The building 2 is equipped with a photovoltaic power generation system 3 including the solar cell panels 1, and the outer wall is made up of a curtain wall 4 equipped with the solar cell panels 1.

[0029] In the following description, the out-of-plane direction refers to the depth direction (prospect direction) when the solar cell panel 1 (curtain wall 4) is viewed from the front. The in-plane direction refers to the direction (prospect direction) perpendicular to the out-of-plane direction. The outdoor side in the out-of-plane direction is simply referred to as the "outdoor side," and the indoor side in the out-of-plane direction is simply referred to as the "indoor side." The left-right direction (horizontal direction) and the up-down direction (vertical direction) refer to the respective directions when the solar cell panel 1 is viewed from the front. One side in the left-right direction refers to the left side in Figures 1, 3, 5 to 8, 10, 11, and 13 to 19, and the other side in the left-right direction refers to the right side in Figures 1, 3, 5 to 8, 10, 11, and 13 to 19.

[0030] The solar power generation system 3 includes a plurality of solar cell panels 1, various cables 5 to 7, a power conditioner 8, a storage battery 9, and the like.

[0031] The solar cell panel 1 generates electricity by converting solar light energy into electrical energy. The power generated by the solar cell panel 1 is collected in a power conditioner 8 installed in an equipment room or the like on the upper floors of the building 2 via various cables 5 to 7. The power collected in the power conditioner 8 is then converted from DC power to AC power for use. The power may also be stored in a storage battery 9. In this example, the case where the power conditioner 8 and the storage battery 9 are installed on the top floor of the building 2 will be described, but when implementing the present invention, the installation locations of the power conditioner and the storage battery are not particularly limited, and may be on the lower floors or in the basement of the building.

[0032] The output voltage of the solar cell group 10 is set lower than the rated input voltage of the power conditioner. For this reason, in this example, a plurality of solar cell panels 1 (several to a dozen or so) are connected in series to form the solar cell group 10 in accordance with the rated input voltage of the power conditioner 8. Each solar cell group 10 is then connected to the power conditioner 8 by a dedicated output cable 5. Note that Figs. 1 and 16 show an example in which one solar cell group 10 is made up of 16 solar cell panels 1. Also, in Fig. 1, the solar cell panels 1 belonging to the same solar cell group 10 are given common symbols from 1G to 5G.

[0033] Multiple solar cell panels 1 belonging to the same solar cell group 10 are connected in series with each other, and depending on the arrangement direction of the two solar cell panels 1 connected in series, the wiring structure of the solar cell panel 1 can be broadly divided into the following two types.

[0034] The first wiring structure is a wiring structure for two solar cell panels 1 arranged side by side in the left-right direction. Two solar cell panels 1 arranged adjacent to each other in the left-right direction are connected in series to each other using an intermediate connection cable 6 arranged so as to span the two solar cell panels 1 in the left-right direction.

[0035] The second wiring structure is a wiring structure for two solar cell panels 1 arranged side by side in the vertical direction. Two solar cell panels 1 arranged side by side in the vertical direction with a glass panel 13 (described later) in between are connected in series to each other using an end connection cable 7 arranged so as to be hung across the two solar cell panels 1 in the vertical direction.

[0036] In this example, the type of cable used for connection and the wiring structure differ depending on the arrangement direction of the two solar cell panels 1 connected in series, but in either wiring structure, the wiring structure is devised so that maintenance work on the solar power generation system 3 can be performed from outdoors. For this reason, in this example, the intermediate connection cable 6 and the end connection cable 7 each correspond to the connection cable described in the claims. Note that when implementing the present invention, only either the first wiring structure or the second wiring structure can be implemented depending on the number and arrangement direction of the solar cell panels that make up the solar cell group.

[0037] Below, the structure of the curtain wall 4 that forms the outer wall of the building 2 will be described, and then the wiring structure of the solar cell panel 1 that uses each of the intermediate connection cables 6 and the end connection cables 7 will be described in detail.

[0038] [Overall structure of curtain wall] The curtain wall 4 in this example is a mullion-type curtain wall, and includes a plurality of mullions 11, 11a, a plurality of lattice beams 12, a plurality of glass panels 13, and a plurality of solar cell panels 1. In this example, the mullions 11, 11a correspond to the vertical frames described in the claims.

[0039] The mullions 11, 11a are arranged with their longitudinal directions facing up and down and are fixed to the outdoor side of the main body 15 via brackets 14. The transom 12 is arranged with its longitudinal direction facing left and right and is connected to span between adjacent mullions 11 (11a) in the left and right direction. The glass panel 13 is set into an opening surrounded on all four sides by the mullions 11 (11a) and the transom 12 and forms a window section of the building 2. The solar cell panel 1 is set into an opening surrounded on all four sides by the mullions 11 (11a) and the transom 12 and forms a wall section of the building 2 called the spandrel section or waist section.

[0040] For this reason, in the building 2 of this example, the glass panels 13 and the solar cell panels 1 are arranged continuously in the left-right direction, with the uprights 11 sandwiched between them, and the glass panels 13 and the solar cell panels 1 are arranged alternately in the up-down direction, with the transom 12 sandwiched between them.

[0041] The specific structure of each component of the curtain wall 4 will be described below with reference to FIGS.

[0042] <Mullet> The mullions 11 and 11a have different structures due to differences in their placement positions in the building 2. That is, the mullion 11 is placed in the middle of the building 2 in the left-right direction, with the glass panel 13 and the solar cell panel 1 placed on both the left and right sides, while the mullion 11a is placed at the end of the building 2 in the left-right direction, with the glass panel 13 and the solar cell panel 1 placed only on one side in the left-right direction (one side or the other side in the left-right direction).

[0043] As shown in Figures 3 and 5, the post 11 is composed of a post body 16, decorative material 17, glass rivets (not shown), and PV rivets 18a and 18b, each of which is made of extruded aluminum alloy material.

[0044] 6 and 7, the mullion 11a is composed of a mullion body 16, decorative material 17, a glass ridge (not shown), either a PV ridge 18a or a PV ridge 18b, and either a cover material 19a or a cover material 19b, each of which is made of extruded aluminum alloy. The mullion 11a does not have two types of PV ridges 18a, 18b, but has one type of PV ridge 18a (or 18b) and one type of cover material 19a (or 19b).

[0045] The upright body 16, which is a part common to the uprights 11 and 11a, is fixed to the outdoor side of the frame 15 and integrally comprises a rectangular pillar portion 20, a flat plate portion 21, and a connecting plate portion 22. In this example, the upright body 16 corresponds to the vertical frame body described in the claims.

[0046] The rectangular pillar portion 20 has a hollow rectangular pillar shape and is provided at the indoor end of the upright body 16. The flat plate portion 21 has a flat plate shape and is arranged with its plate thickness direction facing out of the plane. The flat plate portion 21 is provided at the outdoor end of the upright body 16. The connecting plate portion 22 has a flat plate shape and is arranged with its plate thickness direction facing the left-right direction. The connecting plate portion 22 is provided at the middle portion of the upright body 16 in the out-of-plane direction and connects the rectangular pillar portion 20 and the flat plate portion 21 in the out-of-plane direction. Specifically, the connecting plate portion 22 connects the rectangular pillar portion 20 and the flat plate portion 21 at their left-right middle portions. In the illustrated example, the connecting plate portion 22 is not located in the left-right center between the rectangular pillar portion 20 and the flat plate portion 21, but is located slightly biased to one side in the left-right direction (the left side in Figure 5). Each of the glass panel 13 and the solar cell panel 1 is disposed between two connecting plate portions 22 that are disposed opposite each other in the left-right direction.

[0047] The decorative material 17, which is a part common to the uprights 11 and 11a, is fixed to the outdoor side of the flat plate portion 21 that constitutes the upright body 16 using bolts 23 and nuts 24. In this way, the decorative material 17 covers the upright body 16 from the outdoor side.

[0048] The decorative material 17 has a pair of side plate portions 25a, 25b arranged parallel to each other and spaced apart in the left-right direction, a bottom plate portion 26 connecting the indoor-side portions of the pair of side plate portions 25a, 25b, a pair of fin portions 27a, 27b extending in the left-right direction from the out-of-plane middle portions of each of the pair of side plate portions 25a, 25b so as to approach each other, and a lid portion 28 attached so as to span the pair of fin portions 27a, 27b.

[0049] A dovetail groove is provided on the indoor surface of the bottom plate portion 26. The head of the bolt 23 is engaged in the dovetail groove.

[0050] The decorative material 17 in this example is surrounded on all four sides by a pair of side plate portions 25a, 25b, a bottom plate portion 26, a pair of fin portions 27a, 27b, and a lid portion 28, and is provided with a cable accommodating portion 29 extending in the vertical direction for accommodating the middle portion of the intermediate connecting cable 6 or the middle portion of the end connecting cable 7.

[0051] The lid portion 28 has a generally crank-shaped cross section, and closes an opening 30 of the cable housing portion 29 provided between the pair of fin portions 27a, 27b.

[0052] The end of the lid 28 on the other left-right side (the right side in FIG. 5) is fixed from the outside to the fin 27b on the other left-right side with the lid screw 31. Furthermore, the end of the lid 28 on one left-right side is engaged in the out-of-plane direction with the fin 27a on one left-right side.

[0053] The lid portion 28 can be removed from the pair of fin portions 27a, 27b to the outdoor side by removing the lid screws 31. Therefore, the lid portion 28 can open and close the opening 30 leading to the cable housing portion 29.

[0054] The mullions 11 and 11a hold the vertical sides of the glass panel 13 and the solar panel 1. To this end, the mullion 11 has a glass ridge and two types of PV ridges 18a and 18b. The mullion 11a also has a glass ridge and one type of PV ridge 18a (or 18b).

[0055] Each of the PV ridges 18a, 18b has a substantially L-shaped cross section and is engaged so as to span between the outdoor portion of the rectangular column portion 20 and the connecting plate portion 22. When the PV ridge 18a is engaged with one left-right side of the upright body 16, a holding groove 32a is formed in the area surrounded on three sides by the outdoor portion of the PV ridge 18a, the outdoor half of the connecting plate portion 22, and one left-right side of the flat plate portion 21. The holding groove 32a holds the vertical edge of the solar cell panel 1 on the other left-right side. On the other hand, when the PV ridge 18b is engaged with the other left-right side of the upright body 16, a holding groove 32b is formed in the area surrounded on three sides by the outdoor portion of the PV ridge 18b, the outdoor half of the connecting plate portion 22, and the other left-right side of the flat plate portion 21. The holding groove 32b holds one vertical side of the solar cell panel 1 in the left-right direction.

[0056] As shown in Fig. 6, a PV ridge 18b is engaged on the other left-right side of a support body 16 constituting a support 11a located at one end of the left-right side of the building 2, and a cover material 19a is engaged on one left-right side. In contrast, as shown in Fig. 7, a PV ridge 18a is engaged on one left-right side of a support body 16 constituting a support 11a located at the other end of the left-right side of the building 2, and a cover material 19b is engaged on the other left-right side.

[0057] In this example, a middle portion of the intermediate connection cable 6 is disposed in the cable housing portion 29 of the upright 11, and both side portions of the intermediate connection cable 6 are disposed indoors relative to a panel body 39 (described below) that constitutes the solar cell panel 1, so that a plurality of through holes 33a to 36b and cutouts 58a, 58b are formed in the upright 11. In this example, the through holes 33a to 36b and the cutouts 58a, 58b correspond to the insertion portions described in the claims.

[0058] Specifically, first through holes 33a, 33b that penetrate the bottom plate portion 26 in the out-of-plane direction are formed at height positions in the bottom plate portion 26 that constitute the decorative material 17, corresponding to the upper and lower portions of the solar cell panel 1, respectively.

[0059] In addition, second through holes 34a, 34b that penetrate the flat plate portion 21 in the out-of-plane direction are formed in the flat plate portion 21 that constitutes the upright body 16 in the portions that face the first through holes 33a, 33b in the out-of-plane direction, respectively.

[0060] In addition, in the connecting plate portion 22 that constitutes the upright main body 16, a third through hole 35 that penetrates the connecting plate portion 22 in the left-right direction is formed at a height position approximately the same as the first through hole 33b and the second through hole 34b, which are formed at a height position corresponding to the lower part of the solar cell panel 1.

[0061] Furthermore, in the PV ridge 18a engaged on one side of the upright body 16 in the left-right direction, a fourth through-hole 36a penetrating the PV ridge 18a in the left-right direction and a notch 58a penetrating the PV ridge 18a in the out-of-plane direction are formed at approximately the same height as the third through-hole 35. In addition, in the PV ridge 18b engaged on the other side of the upright body 16 in the left-right direction, a fourth through-hole 36b penetrating the PV ridge 18b in the left-right direction and a notch 58b penetrating the PV ridge 18b in the out-of-plane direction are formed at approximately the same height as the first through-hole 33a and second through-hole 34a formed at a height corresponding to the upper portion of the solar cell panel 1.

[0062] In this example, the first through-holes 33a, 33b, the second through-holes 34a, 34b, and the third through-hole 35 are each configured as a long hole that is long in the vertical direction. In contrast, the fourth through-holes 36a, 36b are each configured as a round hole. In addition, grommets 37 are attached to the inner peripheral edges of the fourth through-holes 36a, 36b.

[0063] Furthermore, in this example, in order to arrange the middle portion of the end connection cable 7 in the cable housing portion 29 of the upright 11a and arrange both sides of the end connection cable 7 indoors relative to the panel body 39 (described later) that constitutes the solar panel 1, the upright 11a is formed with first through holes 33a, 33b, second through holes 34a, 34b, third through hole 35, and fourth through hole 36a (or 36b), as well as a notch 58a (or 58b), just like the upright 11. However, in the upright 11a located at the left-right end of the building 2, the end connection cable 7 is not inserted through all of the first through holes 33a, 33b to fourth through hole 36a (or 36b), but is not inserted through some of the through holes, as will be described later.

[0064] In this example, the first through-hole 33a, the second through-hole 34a, and the fourth through-hole 36b are all approximately the same height position, and the first through-hole 33b, the second through-hole 34b, the third through-hole 35, and the fourth through-hole 36a are all approximately the same height position. However, when implementing the present invention, the height positions of the various through-holes can be changed as appropriate. For example, the height positions of the first through-hole 33a and the second through-hole 34a located on the upper side can be lower than the height position of the fourth through-hole 36a, or the height positions of the first through-hole 33b and the second through-hole 34b located on the lower side can be higher than the height positions of the third through-hole 35 and the fourth through-hole 36b.

[0065] <Mu-e> The transom 12 is made of an extruded aluminum alloy material and is composed of a transom body 59 and a pair of flanges 60a, 60b.

[0066] Of the ridges 60a, 60b, one ridge 60a is fastened to the upper portion of the outside-side end of the transom body 59. In contrast, the other ridge 60b is fastened to the lower portion of the outside-side end of the transom body 59.

[0067] A holding groove 61a is formed in the upper part of the transom 12, which is surrounded on three sides by the transom body 59 and the ledge 60a. The lower edges of the glass panel 13 and the solar panel 1 are held in the holding groove 61a.

[0068] A holding groove 61b is formed in the lower part of the transom 12, which is surrounded on three sides by the transom body 59 and the ledge 60b. The upper edges of the glass panel 13 and the solar panel 1 are held in the holding groove 61b.

[0069] <Glass panel> In this embodiment, the glass panel 13 is a double-glazed glass panel made up of two glass plates 38, and is set into an area surrounded on all four sides by a mullion 11 and a gable 12. The glass panel 13 constitutes a window portion of the building 2, and is provided in a portion corresponding to the interior space.

[0070] <Solar panel> The solar cell panel 1 generates electricity by converting solar light energy into electrical energy, and is set up in an area surrounded on all four sides by mullions 11 and crossbeams 12. In this example, the solar cell panel 1 forms the wall of the building 2, and is provided in the area corresponding to the attic space and underfloor space. However, when implementing the present invention, a see-through type solar cell panel can also be used to form the window portion of the building with the solar cell panel.

[0071] 15, the solar cell panel 1 has a panel body 39, a positive terminal portion 40, a negative terminal portion 41, a positive current collecting cable 42, and a negative current collecting cable 43. The solar cell panel 1 of this example has one positive terminal portion 40 and one negative terminal portion 41, as well as one positive current collecting cable 42 and one negative current collecting cable 43.

[0072] The panel body 39 has a light-transmitting front panel 44 such as a glass plate arranged on the outdoor side, which is the light-receiving side, a back panel 45 such as a glass plate arranged on the indoor side, which is the back side, and a plurality of solar cell cells (not shown) sealed with a transparent filler between the front panel 44 and the back panel 45.

[0073] In this example, the outdoor surface (front surface) of the panel body 39 is arranged on the same plane as the outdoor surface of the glass panel 13. In addition, the outdoor surfaces of the panel bodies 39 arranged in the left-right direction are also arranged on the same plane.

[0074] The plurality of solar cells are connected to each other in series or in parallel to form a solar cell module 46. The solar cell module 46 is formed by connecting a plurality of solar cells arranged adjacent to each other in the left-right direction in series. In this example, the panel body 39 is provided with only one solar cell module 46. When implementing the present invention, it is also possible to provide a plurality of solar cell modules in the panel body, as in the third and fourth examples of the embodiment described below.

[0075] The positive terminal 40 and the negative terminal 41 are provided on the indoor surface of the panel body 39, i.e., on the back surface of the back plate 45. The positive terminal 40 and the negative terminal 41 are electrically connected to both ends of a solar cell module 46, which is a circuit formed by connecting multiple solar cells to each other. Therefore, each solar cell module 46 is provided with one positive terminal 40 and one negative terminal 41.

[0076] The positive terminal 40 is located at an upper portion on the other left-right side of the panel body 39 and is housed in a terminal box 47a. The negative terminal 41 is located at an upper portion on one left-right side of the panel body 39 and is housed in a terminal box 47b.

[0077] One end of the positive current collecting cable 42 is directly connected to the positive terminal portion 40. The other end of the positive current collecting cable 42 is provided with a first connector 48. The positive current collecting cable 42 is pulled out from the terminal box 47a toward the center of the panel main body 39 in the left-right direction. In Figures 15 to 19, the first connector 48 is represented by a circle (◯).

[0078] One end of the negative current collecting cable 43 is directly connected to the negative terminal portion 41. The other end of the negative current collecting cable 43 is provided with a second connector 49. The second connector 49 can only be connected to the first connector 48. The negative current collecting cable 43 is pulled out from the terminal box 47b towards the center of the panel main body 39 in the left-right direction. In Figures 15 to 19, the second connector 49 is represented by a triangle mark (△).

[0079] The curtain wall 4 of this example further includes an inner wall material 56 on the indoor side of the solar cell panel 1. The inner wall material 56 is provided between the rectangular pillar portions 20 of the mullions 11 (11a) that are arranged adjacent to each other in the left-right direction. Therefore, the positive terminal portion 40, the negative terminal portion 41, the positive current collecting cable 42, and the negative current collecting cable 43 that constitute the solar cell panel 1 are arranged in the space formed between the panel body 39 and the inner wall material 56.

[0080] <Solar panel wiring structure> In this example, a solar cell group 10 is configured by connecting a plurality of solar cell panels 1 in series with each other. In the example shown in Fig. 1 and Fig. 16, one solar cell group 10 is configured with 16 solar cell panels 1, and one entire wall surface of the building 2 is provided with five solar cell groups 10, 1G to 5G.

[0081] Of the multiple solar cell panels 1 belonging to the same solar cell group 10, two solar cell panels 1 arranged adjacent to each other in the left-right direction are connected in series to each other using an intermediate connection cable 6. Also, of the multiple solar cell panels 1 belonging to the same solar cell group 10, two solar cell panels 1 arranged adjacent to each other in the up-down direction with a glass panel 13 sandwiched between them are connected in series to each other using an end connection cable 7.

[0082] For this purpose, of the two ends of the intermediate connection cable 6, a second connector 49 is provided at one end that connects to the positive current collecting cable 42, and a first connector 48 is provided at the other end that connects to the negative current collecting cable 43. Also, of the two ends of the end connection cable 7, a second connector 49 is provided at one end that connects to the positive current collecting cable 42, and a first connector 48 is provided at the other end that connects to the negative current collecting cable 43.

[0083] <<First wiring structure>> In this example, both ends of the intermediate connection cable 6 connecting two solar cell panels 1 arranged adjacent to each other horizontally are arranged indoors relative to the indoor face of the panel body 39, while the middle part of the intermediate connection cable 6 is arranged outdoors relative to the outdoor face of the panel body 39.

[0084] For this purpose, as shown in FIGS. 5 and 8, the intermediate connection cable 6 is arranged by being inserted through the through holes 33a to 36b and the notches 58a, 58b provided in the mullion 11.

[0085] Specifically, the middle portion of the intermediate connection cable 6 is housed in the cable housing 29 of the upright 11 with its longitudinal direction facing up and down. The upper portion of the intermediate connection cable 6 is bent approximately 90 degrees indoors relative to the middle portion of the intermediate connection cable 6, and is inserted out-of-plane through the first through-hole 33a, the second through-hole 34a, and the notch 58b, and is further bent approximately 90 degrees toward the other left-right side to be inserted laterally through the fourth through-hole 36b. The lower portion of the intermediate connection cable 6 is bent approximately 90 degrees indoors relative to the middle portion of the intermediate connection cable 6, and is inserted out-of-plane through the first through-hole 33b and the second through-hole 34b, and is further bent approximately 90 degrees toward one left-right side to be inserted laterally through the third through-hole 35, the notch 58a, and the fourth through-hole 36a.

[0086] As a result, the upper portion of the intermediate connection cable 6 is inserted on the other left-right side of the upright 11 and closer to the interior of the room than the panel main body 39. In addition, the lower portion of the intermediate connection cable 6 is inserted on one left-right side of the upright 11 and closer to the interior of the room than the panel main body 39. In addition, a grommet 37 is provided between the outer peripheral surface of the intermediate connection cable 6 and the fourth through holes 36a, 36b.

[0087] In this example, by disposing the intermediate connection cable 6 as described above, the second connector 49 provided at one end of the intermediate connection cable 6 is connected to the first connector 48 provided at the positive power collecting cable 42 of one of the two solar cell panels 1 arranged adjacently in the horizontal direction. Also, the first connector 48 provided at the other end of the intermediate connection cable 6 is connected to the second connector 49 provided at the negative power collecting cable 43 of the other solar cell panel 1 of the two solar cell panels 1 arranged adjacently in the horizontal direction.

[0088] In this example, as shown in Figures 16 to 19, the left-right arrangement of the positive terminal unit 40 and the negative terminal unit 41 is the same for the solar cell panels 1 forming the wall portions of the odd-numbered floors and the solar cell panels 1 forming the wall portions of the even-numbered floors. Therefore, on the even-numbered floors, the positive terminal unit 40 and the negative terminal unit 41 that are positioned close to each other in the left-right direction are connected by an intermediate connecting cable 6, whereas on the odd-numbered floors, the positive terminal unit 40 and the negative terminal unit 41 that are positioned far apart in the left-right direction are connected by an intermediate connecting cable 6. In Figures 16 to 19, the circuits formed by the various cables 6 (50, 51), 7 (53, 54, 55), 42, 43 are shown by solid lines, and the circuits formed by the connection between the first connector 48 and the second connector 49 are shown by dashed lines.

[0089] On the even-numbered floors, the second connector 49 provided at one end of the intermediate connection cable 6 is connected to the first connector 48 provided at the positive current collecting cable 42 of the solar cell panel 1 on one side in the left-right direction of the two solar cell panels 1 connected by the intermediate connection cable 6. In addition, the first connector 48 provided at the other end of the intermediate connection cable 6 is connected to the second connector 49 provided at the negative current collecting cable 43 of the solar cell panel 1 on the other side in the left-right direction of the two solar cell panels 1 connected by the intermediate connection cable 6.

[0090] On the other hand, on the odd-numbered floors, the second connector 49 provided at one end of the intermediate connection cable 6 is connected to the first connector 48 provided at the positive current collecting cable 42 of the solar cell panel 1 on the other left-right side of the two solar cell panels 1 connected by the intermediate connection cable 6. Also, the first connector 48 provided at the other end of the intermediate connection cable 6 is connected to the second connector 49 provided at the negative current collecting cable 43 of the solar cell panel 1 on one left-right side of the two solar cell panels 1 connected by the intermediate connection cable 6.

[0091] As described above, in this example, on both even and odd floors, two solar cell panels 1 arranged adjacent to each other in the left-right direction are connected in series to each other using an intermediate connection cable 6 whose intermediate portion is arranged outside of the panel body 39. Note that the intermediate connection cable 6 can be attached to the upright 11 by passing it through each of the through holes 33a to 36b and the notches 58a, 58b before the upright 11 is fixed to the frame 15.

[0092] The intermediate connection cable 6 in this example is made up of two cables: a first intermediate connection cable 50 and a second intermediate connection cable 51.

[0093] One end of the first intermediate connection cable 50 constitutes one end of the intermediate connection cable 6. Therefore, one end of the first intermediate connection cable 50 is provided with a second connector 49, and the other end of the first intermediate connection cable 50 is provided with a first connector 48.

[0094] In contrast, the other end of the second intermediate connection cable 51 constitutes the other end of the intermediate connection cable 6. Therefore, the other end of the second intermediate connection cable 51 is provided with a first connector 48, and the one end of the second intermediate connection cable 51 is provided with a second connector 49.

[0095] Then, a first connector 48 provided at the other end of the first intermediate connection cable 50 and a second connector 49 provided at one end of the second intermediate connection cable 51 are connected to form an intermediate connection cable 6. In this example, a connector connection portion 52 between the first connector 48 of the first intermediate connection cable 50 and the second connector 49 of the second intermediate connection cable 51 is housed in the cable housing portion 29. Therefore, by removing the cover portion 28 from the upright 11, the connector connection portion 52 of the intermediate connection cable 6 can be accessed from the outdoors.

[0096] <<Second wiring structure>> In this example, both ends of the end connection cable 7 that connects to two solar cell panels 1 arranged side by side in the vertical direction across the glass panel 13 are arranged indoors relative to the indoor face of the panel body 39, while the middle part of the end connection cable 7 is arranged outdoors relative to the outdoor face of the panel body 39.

[0097] In the upright 11a located at one end of the building 2 in the left-right direction, as shown in Figure 6, the end connection cable 7 is inserted and arranged through the first through hole 33a, the second through hole 34a, the notch 58b and the fourth through hole 36b provided in the upright 11a.

[0098] Specifically, the middle portion of the end connection cable 7 is housed in the cable housing 29 with its longitudinal direction facing up and down. Then, the upper portion of the end connection cable 7 is bent approximately 90 degrees indoors with respect to the middle portion of the end connection cable 7, and is inserted out of the plane through the first through-hole 33a, the second through-hole 34a, and the notch 58b provided at a height position corresponding to the upper portion of the upper solar panel 1 of the two solar cell panels 1 connected via the end connection cable 7, and is further bent approximately 90 degrees towards the other left-right side, and is inserted left-right through the fourth through-hole 36b. In addition, the lower part of the end connection cable 7 is bent approximately 90 degrees toward the indoor side relative to the middle part of the end connection cable 7, and the first through hole 33a, the second through hole 34a, and the notch 58b, which are provided at a height position corresponding to the upper part of the solar panel 1 located on the lower side of the two solar cell panels 1 connected via the end connection cable 7, are inserted in an out-of-plane direction, and the cable is further bent approximately 90 degrees toward the other left-right side, and the fourth through hole 36b is inserted in the left-right direction.

[0099] As a result, the upper and lower parts of the end connection cable 7 are inserted on the other left-right side of the upright 11a located at one end of the building 2 in the left-right direction, and on the indoor side of the panel main body 39. In addition, a grommet 37 (see FIG. 5, etc.) is provided between the outer peripheral surface of the end connection cable 7 and the fourth through-hole 36b.

[0100] In this example, by disposing the end connection cable 7 as described above, the second connector 49 provided at one end of the end connection cable 7 is connected to the first connector 48 provided at the positive current collecting cable 42 of the solar cell panel 1 located on the lower side of the two solar cell panels 1 connected by the end connection cable 7. Furthermore, the first connector 48 provided at the other end of the end connection cable 7 is connected to the second connector 49 provided at the negative current collecting cable 43 of the solar cell panel 1 located on the upper side of the two solar cell panels 1 connected by the end connection cable 7. In this way, the two solar cell panels 1 arranged side by side in the vertical direction with the glass panel 13 sandwiched between them are connected in series to each other using the end connection cable 7, whose middle portion is located closer to the outdoors than the panel body 39. In addition, the end connection cable 7 can be attached to the upright 11a by inserting it through each of the through holes 33a, 34a, 36b and notch 58b before the upright 11a, which is located at one end of the left-right side of the building 2, is fixed to the main body 15.

[0101] In contrast, in the upright 11a located at the other end of the building 2 in the left-right direction, as shown in Figure 7, the end connection cable 7 is inserted and arranged through each of the first through hole 33b, second through hole 34b, third through hole 35, notch 58a and fourth through hole 36a provided in the upright 11a.

[0102] Specifically, the middle portion of the end connection cable 7 is housed in the cable housing 29 with its longitudinal direction facing up and down. Then, the upper portion of the end connection cable 7 is bent approximately 90 degrees indoors with respect to the middle portion of the end connection cable 7, and is inserted out of the plane through the first through-hole 33b and the second through-hole 34b provided at a height position corresponding to the lower portion of the upper solar panel 1 of the two solar cell panels 1 connected via the end connection cable 7, and is further bent approximately 90 degrees to one side in the left-right direction, and is inserted through the third through-hole 35, the notch 58a, and the fourth through-hole 36a. In addition, the lower part of the end connection cable 7 is bent approximately 90 degrees indoors relative to the middle part of the end connection cable 7, and is inserted in an out-of-plane direction through the first through hole 33b and the second through hole 34b, which are provided at a height position corresponding to the lower part of the solar cell panel 1 located on the lower side of the two solar cell panels 1 connected via the end connection cable 7, and is further bent approximately 90 degrees to one side in the left-right direction, and is inserted through the third through hole 35, the notch 58a, and the fourth through hole 36a.

[0103] As a result, the upper and lower parts of the end connection cable 7 are positioned laterally farther from the mullions 11a disposed at the other end of the building 2 in the left-right direction. One side The end connection cable 7 is inserted closer to the indoor side than the panel main body 39. A grommet 37 (see FIG. 5, etc.) is provided between the outer peripheral surface of the end connection cable 7 and the fourth through-hole 36a.

[0104] In this example, by disposing the end connection cable 7 as described above, the second connector 49 provided at one end of the end connection cable 7 is connected to the first connector 48 provided at the positive current collecting cable 42 of the solar cell panel 1 located on the lower side of the two solar cell panels 1 connected by the end connection cable 7. Furthermore, the first connector 48 provided at the other end of the end connection cable 7 is connected to the second connector 49 provided at the negative current collecting cable 43 of the solar cell panel 1 located on the upper side of the two solar cell panels 1 connected by the end connection cable 7. In this way, the two solar cell panels 1 arranged side by side in the vertical direction with the glass panel 13 sandwiched between them are connected in series to each other using the end connection cable 7, whose middle portion is located closer to the outdoors than the panel body 39. In addition, the end connection cable 7 can be attached to the upright 11a by inserting it through each of the through holes 33b, 34b, 35, 36a and notch 58a before the upright 11a located at the other end of the left-right side of the building 2 is fixed to the main body 15.

[0105] The end connection cable 7 in this example is made up of three cables: a first end connection cable 53, a second end connection cable 54, and a relay cable 55.

[0106] One end of the first end connection cable 53 constitutes one end of the end connection cable 7. Therefore, one end of the first end connection cable 53 is provided with a second connector 49, and the other end of the first end connection cable 53 is provided with a first connector 48.

[0107] On the other hand, the other end of the second end connection cable 54 constitutes the other end of the end connection cable 7. Therefore, the other end of the second end connection cable 54 is provided with a first connector 48, and the one end of the second end connection cable 54 is provided with a second connector 49.

[0108] The relay cable 55 also has a second connector 49 at one end and a first connector 48 at the other end.

[0109] Then, the first connector 48 provided at the other end of the first end connection cable 53 is connected to the second connector 49 provided at one end of the relay cable 55, and the second connector 49 provided at one end of the second end connection cable 54 is connected to the first connector 48 provided at the other end of the relay cable 55, thereby forming the end connection cable 7. In this example, the connector connection portion 52a between the first connector 48 of the first end connection cable 53 and the second connector 49 of the relay cable 55, and the connector connection portion 52b between the second connector 49 of the second end connection cable 54 and the first connector 48 of the relay cable 55 are housed in the cable housing portion 29. Therefore, by removing the cover portion 28 from the upright 11a, the connector connections 52a and 52b of the end connection cable 7 can be accessed from the outdoors.

[0110] In this example, the positions and sizes of the through holes 33a to 36b and the notches 58a, 58b are set so that the intermediate connection cable 6 and the end connection cable 7 are not damaged at each bending portion, and the bending radius of the intermediate connection cable 6 and the end connection cable 7 is ensured to be relatively large.

[0111] In this example, each solar cell group 10 is connected to a power conditioner 8 via an output cable 5. Specifically, of the multiple solar cell panels 1 that make up the solar cell group 10, the positive terminal portion 40 and the negative terminal portion 41 of two solar cell panels 1 arranged at both ends are connected via the output cable 5 to the power conditioner 8 installed on the top floor of the building 2.

[0112] Furthermore, the output cable 5 is housed in a cable housing section 29 provided in the uprights 11, 11a. Therefore, the size of the cross-sectional area of ​​the cable housing section 29 is determined based on the number and thickness of the various cables 5 to 7 housed in the cable housing section 29. The output cable 5 is led from the cable housing section 29 of the uprights 11, 11a through the beam section 57 of the building 2 to the power conditioner 8 installed on the top floor.

[0113] According to the building 2 having the wiring structure of the solar cell panel 1 as described above, maintenance work on the solar power generation system 3 can be carried out from the outside. That is, in this example, multiple solar cell panels 1 constituting the same solar cell group 10 are connected in series to one another using intermediate connection cables 6 and end connection cables 7, each of whose intermediate portions are arranged outdoors relative to the panel body 39. This allows a maintenance worker to access the intermediate portions of the intermediate connection cables 6 and end connection cables 7 from outdoors using a gondola or the like, and to inspect the electrical status of these intermediate connection cables 6 and end connection cables 7. This makes it possible to check whether there is a malfunction in the solar cell panel 1 from outdoors. As a result, maintenance work on the solar power generation system can be performed from outdoors.

[0114] This eliminates time constraints on maintenance work, thereby reducing the number of days required for maintenance work. Furthermore, because maintenance work can be performed outdoors, it avoids damaging interior materials such as flooring and interior walls. Furthermore, because outdoor work is possible, work efficiency is improved compared to performing maintenance work in narrow spaces such as attic spaces or underfloor spaces. Furthermore, it is easy to distinguish between good and bad for each cable, making it easy to identify which solar panel 1 in the building has a malfunction. Furthermore, in this example, some of the various cables 5 to 7 that make up the solar power generation system 3 can be housed in the cable housing 29 of the uprights 11 and 11a, eliminating the need to route various cables indoors, which is advantageous in terms of ensuring a spacious interior space.

[0115] In this example, the connector connection portion 52 of the intermediate connection cable 6 and the connector connection portions 52a, 52b of the end connection cable 7 are accommodated in the cable accommodating portion 29. Therefore, the first connector 48 and the second connector 49 constituting the connector connection portions 52, 52a, 52b can be disconnected, and inspection equipment can be connected to these first connector 48 and second connector 49 from the outdoor side. This improves the efficiency of maintenance work on the solar panel 1. Furthermore, inspection performance can be improved compared to when non-contact inspection equipment is used. Furthermore, the ease of wiring the intermediate connection cable 6 and the end connection cable 7 can be improved.

[0116] In addition, in this example, the intermediate connection cable 6 and the end connection cable 7 housed in the cable housing section 29 can be easily accessed by removing the cover section 28 from the upright 11. This makes it possible to improve the efficiency of maintenance work while maintaining the aesthetic design of the exterior of the building 2.

[0117] [Second Example of Implementation] A second example of the embodiment will be described with reference to FIGS.

[0118] This example is a modification of the first example of the embodiment, and the structure of the solar cell panel 1a is changed from the structure of the first example of the embodiment.

[0119] The solar cell panel 1a includes only one solar cell module 46a. The solar cell module 46a is configured by connecting multiple solar cells adjacent to each other in series in the vertical direction. The solar cell panel 1a includes one positive terminal 40 and one negative terminal 41 on the indoor surface of the panel body 39. The positive terminal 40 is located at an upper portion on one left-right side of the panel body 39, and the negative terminal 41 is located at a lower portion on one left-right side of the panel body 39.

[0120] In this example, among the multiple solar cell panels 1a belonging to the same solar cell group 10, two solar cell panels 1a arranged adjacent to each other in the left-right direction are connected in series to each other using the intermediate connection cable 6. Furthermore, among the multiple solar cell panels 1a belonging to the same solar cell group 10, two solar cell panels 1a arranged adjacent to each other in the up-down direction with the glass panel 13 sandwiched therebetween are connected in series to each other using the end connection cable 7.

[0121] In the case of the present example as described above, the positive terminal portion 40 and the negative terminal portion 41 can be arranged biased to one side in the left-right direction of the solar cell panel 1. This is advantageous in that the space between the solar cell panel 1 and the inner wall material 56 can be used for other purposes. The other configurations and effects are the same as those of the first embodiment.

[0122] [Third example of embodiment] A third example of the embodiment will be described with reference to FIGS.

[0123] This example is a modification of the first example of the embodiment, and the structure of the solar cell panel 1b is changed from the structure of the first example of the embodiment.

[0124] The solar cell panel 1b includes two solar cell modules 46. Therefore, the solar cell panel 1b includes two positive terminal portions 40 and two negative terminal portions 41 on the indoor surface of the panel body 39. The positive terminal portions 40 are respectively arranged at the upper and lower portions on the other left-right side of the panel body 39, and the negative terminal portions 41 are respectively arranged at the upper and lower portions on one left-right side of the panel body 39.

[0125] In this example, two solar cell modules 46 are connected in series by directly connecting one pair of diagonally arranged positive terminal portion 40 and negative terminal portion 41 out of two pairs of positive terminal portion 40 and negative terminal portion 41 provided on the solar cell panel 1b.

[0126] In this example, among the multiple solar cell panels 1b belonging to the same solar cell group 10, two solar cell panels 1b arranged adjacent to each other in the left-right direction are connected in series to each other using the intermediate connection cable 6. Furthermore, among the multiple solar cell panels 1b belonging to the same solar cell group 10, two solar cell panels 1b arranged adjacent to each other in the up-down direction with the glass panel 13 sandwiched therebetween are connected in series to each other using the end connection cable 7.

[0127] In the case of this example as described above, one solar cell panel 1b is provided with two solar cell modules 46, so that the output per solar cell panel 1b can be increased. The other configurations and effects are the same as those of the first embodiment.

[0128] [Fourth Example of Embodiment] A fourth example of the embodiment will be described with reference to FIGS.

[0129] This example is a modification of the second example of the embodiment, and the structure of the solar cell panel 1c is changed from the structure of the second example of the embodiment.

[0130] The solar cell panel 1c includes two solar cell modules 46a. Therefore, the solar cell panel 1c includes two positive terminal portions 40 and two negative terminal portions 41 on the indoor surface of the panel body 39. The positive terminal portions 40 are located on the upper portions of both left and right sides of the panel body 39, and the negative terminal portions 41 are located on the lower portions of both left and right sides of the panel body 39.

[0131] In this example, two solar cell modules 46a are connected in series by directly connecting one pair of diagonally arranged positive terminal portion 40 and negative terminal portion 41 out of two pairs of positive terminal portion 40 and negative terminal portion 41 provided on the solar cell panel 1c.

[0132] In this example, among the multiple solar cell panels 1c belonging to the same solar cell group 10, two solar cell panels 1c arranged adjacent to each other in the left-right direction are connected in series to each other using the intermediate connection cable 6. Furthermore, among the multiple solar cell panels 1c belonging to the same solar cell group 10, two solar cell panels 1c arranged adjacent to each other in the up-down direction with the glass panel 13 sandwiched therebetween are connected in series to each other using the end connection cable 7.

[0133] In the case of this example as described above, similarly to the third example of the embodiment, the output per solar cell panel 1c can be increased. The other configurations and effects are the same as those of the first and second embodiments.

[0134] Although the embodiments of the present invention have been described above, the present invention is not limited to these and can be modified as appropriate without departing from the technical concept of the invention. Furthermore, when implementing the present invention, the structures of the examples of the embodiments can be combined as appropriate.

[0135] The wiring structure for solar cell panels of the present invention is not limited to solar cell panels that form the outer walls of buildings, but can also be applied to the wiring structure for solar cell panels that form the outer walls of other structures. Furthermore, when implementing the present invention, the structure of the mullions corresponding to the vertical frames is not limited to the structure of the embodiment and can be modified as appropriate. Furthermore, when implementing the present invention, the connection cable is not limited to a structure in which multiple cables are connected by connector connections, but can be configured from a single cable. Furthermore, when the connection cable is configured from multiple cables, the number of cables is not limited to the number described in the embodiment and can be modified as appropriate. [Explanation of symbols]

[0136] 1, 1a, 1b, 1c solar panels 2 Building 3. Solar power generation system 4. Curtain Wall 5 Output Cable 6 Intermediate connecting cable 7 End connection cable 8 Power conditioner 9. Storage battery 10. Solar Cell Group 11, 11a mullion 12 No Eyes 13 Glass Panel 14 Bracket 15 skeleton 16. Main body 17 Cosmetic materials 18a, 18b PV rim 19a, 19b Cover material 20 Prismatic section 21 Flat plate part 22 Connecting plate part 23 volts 24 Nut 25a, 25b side plate part 26 Bottom plate part 27a, 27b Fins 28 Lid 29 Cable storage section 30 Opening 31 Lid screw 32a, 32b Holding groove 33a, 33b 1st through hole 34a, 34b 2nd through hole 35 3rd hole 36a, 36b 4th hole 37 Grommet 38 Glass Plate 39 Panel body 40 Positive terminal 41 Negative terminal 42 Positive collector cable 43 Negative collector cable 44 Surface plate 45 Back plate 46, 46a Solar cell module 47a, 47b Terminal box 48 First Connector 49 Second Connector 50 First intermediate connection cable 51 Second intermediate connecting cable 52, 52a, 52b Connector connection part 53 First end connection cable 54 Second end connection cable 55 Relay cable 56 Interior wall materials 57 Beam section 58a, 58b notch 59 Eyeless Body 60a, 60b rim 61a, 61b Holding groove 100 solar panels 101 Building 102 Curtain Wall 103 Floor slab 104 Bracket 105 Mullion 106 No Eyes 107 Glass Panel 108 Panel body 109 Terminal box 110 Interior wall materials 111 Positive collector cable 112 Negative collector cable 113 Output Cable

Claims

1. A wiring structure for solar cell panels that form the outer wall of a building, The solar cell panel has a panel body including a plurality of solar cells, and a positive terminal portion and a negative terminal portion that are arranged on an indoor surface of the panel body and are electrically connected to the plurality of solar cells, Of the two solar cell panels arranged side by side in a predetermined direction, the positive terminal portion of one of the solar cell panels and the negative terminal portion of the other solar cell panel are connected via a connection cable, at least a portion of which is arranged outdoors relative to the panel body. Solar panel wiring structure.

2. The connection cable is made up of at least two cables connected via a connector connecting portion disposed on the outdoor side of the panel body.

2. The wiring structure of a solar cell panel according to claim 1.

3. the predetermined direction is the left-right direction, a vertical frame having an insertion portion is disposed between the two solar cell panels in the left-right direction, The connection cable is inserted through the insertion portion of the vertical frame.

2. The wiring structure of a solar cell panel according to claim 1.

4. the predetermined direction is the up-down direction, a glass panel is disposed between the two solar cell panels in the up-down direction, and a vertical frame having an insertion portion is disposed on one side of the two solar cell panels in the left-right direction; The connection cable is inserted through the insertion portion of the vertical frame.

2. The wiring structure of a solar cell panel according to claim 1.

5. The vertical frame has a cable housing portion extending in the vertical direction on the outdoor side of the panel body, A portion of the connection cable is accommodated in the cable accommodating section.

5. The wiring structure of a solar cell panel according to claim 3 or 4.

6. The vertical frame has a vertical frame body fixed to a skeleton and a decorative material fixed to the outdoor side of the vertical frame body, The cable housing is provided in the decorative material.

6. The wiring structure of a solar cell panel according to claim 5.

7. The solar cell panel wiring structure according to claim 5 , wherein the vertical frame has a lid portion that can open and close the opening of the cable housing portion.

8. the solar panel further includes a positive current collecting cable connected to the positive terminal portion and a negative current collecting cable connected to the negative terminal portion; Both ends of the connection cable are connected to the positive current collecting cable provided on one of the solar cell panels and the negative current collecting cable provided on the other of the solar cell panels, respectively.

2. The wiring structure of a solar cell panel according to claim 1.

9. a first connector is provided at an end of the positive current collecting cable; a second connector is provided at the end of the negative current collector cable; One end of the connection cable, which is connected to the positive collector cable, is provided with the second connector, and the other end, which is connected to the negative collector cable, is provided with the first connector.

9. The wiring structure of a solar cell panel according to claim 8.

Images