Photovoltaic power generation system

Abstract

Provided is a photovoltaic power generation system that allows easy terminal box maintenance. A photovoltaic power generation system (1) according to one embodiment of the present invention comprises: a solar cell module (10) having a photovoltaic power generation cell (15); and a terminal box (30) connected to the photovoltaic power generation cell (15) via wiring (21). The terminal box (30) is provided at a position spaced apart from the solar cell module (10).

Description

Solar power generation system

[0001] The present invention relates to a photovoltaic power generation system.

[0002] In recent years, the use of solar cell modules equipped with multiple solar cells has been increasing in order to utilize natural energy. In solar cell modules equipped with multiple solar cells, wiring connected to the solar cells is extended from the inside of the solar cell module to the outside in order to extract the power generated by the solar cells to the outside. The wiring thus extended is then connected to electrode terminals provided in a terminal box.

[0003] Patent Document 1 discloses a technique relating to a solar cell module having a terminal box at an end of the solar cell module.

[0004] JP 2012-212948 A

[0005] In a solar cell module, power generated by solar cells is extracted to the outside via a terminal box. The terminal box is equipped with components such as electrode terminals, output cables, and bypass diodes. Such terminal boxes may break down or deteriorate over time. In the technology disclosed in Patent Document 1, the terminal box is fixed to the end of the solar cell module.

[0006] However, when a terminal box is provided at the end of a solar cell module, the terminal box may be placed in a location that is difficult for people to access, such as the ceiling of a building, when the solar cell module is installed in a building, etc. Therefore, when the terminal box is fixed to the end of the solar cell module as in the technology disclosed in Patent Document 1, there is a problem that maintenance of the terminal box becomes difficult.

[0007] In view of the above problems, an object of the present invention is to provide a solar power generation system in which maintenance of a terminal box can be easily performed.

[0008] A solar power generation system according to one aspect of the present invention is as follows.

[0009] [1] A photovoltaic power generation system comprising: a solar cell module including a photovoltaic power generation cell; and a terminal box connected to the photovoltaic power generation cell via wiring, wherein the terminal box is provided at a position spaced apart from the solar cell module.

[0010] [2] The solar power generation system according to [1], wherein the solar cell module is disposed between the ceiling and floor of a building and is configured as a glass window on which the solar power generation cell is provided.

[0011] [3] The solar power generation system according to [1], wherein the solar cell module is configured as a module arranged to face a glass window of a building.

[0012] [4] The solar power generation system according to [1], wherein the solar cell module is arranged in a spandrel portion of a building.

[0013] [5] The solar power generation system according to [2] or [4], wherein an inspection hatch is provided in the boundary portion corresponding to the ceiling or the spandrel portion, and the terminal box is provided near the inspection hatch.

[0014] [6] The solar power generation system according to [2], wherein a sash is provided around the glass window, the sash is provided with a housing that can be opened and closed from inside the room, and the terminal box is housed in the housing.

[0015] [7] The photovoltaic power generation system according to any one of [2] to [4], wherein a distribution board is provided inside the building, and the terminal box is provided inside the distribution board.

[0016] [8] The solar power generation system according to any one of [2] to [4], wherein a pipe space is provided in the building, and the terminal box is provided in the pipe space.

[0017] [9] The photovoltaic power generation system according to any one of [1] to [8], wherein the wiring is bus bar wiring, the bus bar wiring is pulled out from an end of the solar cell module, and the pulled out bus bar wiring is connected to the terminal box.

[0018]

[10] The photovoltaic power generation system according to any one of [1] to [9], wherein the terminal box comprises: a positive electrode terminal connected to a positive wiring of the photovoltaic power generation cell; a negative electrode terminal connected to a negative wiring of the photovoltaic power generation cell; and a bypass diode connected between the positive electrode terminal and the negative electrode terminal, and the bypass diode is configured to pass a current from the positive electrode terminal to the negative electrode terminal when the photovoltaic power generation cell fails.

[0019]

[11] The photovoltaic power generation system according to

[10] , wherein a positive wiring of the photovoltaic power generation cell is detachably connected to the positive electrode terminal, and a negative wiring of the photovoltaic power generation cell is detachably connected to the negative electrode terminal.

[0020]

[12] The solar power generation system according to

[10] or

[11] , wherein the terminal box further includes: a positive output cable electrically connected to the positive electrode terminal; and a negative output cable electrically connected to the negative electrode terminal.

[0021]

[13] The photovoltaic power generation system according to any one of [1] to

[12] , wherein a connector is provided at an end of the solar cell module, bus bar wiring connected to the photovoltaic power generation cell is connected to one end of the connector, and the other end of the connector is connected to the terminal box via the wiring.

[0022]

[14] The solar power generation system according to

[13] , wherein the connector has an L-shaped cross section.

[0023] The present invention can provide a solar power generation system that allows for easy maintenance of the terminal box.

[0024] FIG. 1 is a cross-sectional view showing a configuration example of a solar cell module included in the solar power generation system according to the embodiment; FIG. 2 is a diagram showing a configuration example of a terminal box included in the solar power generation system according to the embodiment; FIG. 3 is a cross-sectional view showing an installation example of a solar power generation system according to the embodiment; FIG. 4 is a cross-sectional view showing an installation example of a solar power generation system according to the embodiment; FIG. 5 is a front view showing an installation example of a solar power generation system according to the embodiment; FIG. 6 is a plan view showing an installation example of a solar power generation system according to the embodiment; FIG. 7 is a cross-sectional view showing an installation example of a solar power generation system according to the embodiment;

[0025] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a cross-sectional view showing an example of the configuration of a solar power generation system according to the embodiment. Fig. 2 is a front view showing an example of the configuration of a solar cell module provided in the solar power generation system according to the embodiment. As shown in Fig. 1, the solar power generation system 1 according to the embodiment includes a solar cell module 10 and a terminal box 30.

[0026] As shown in FIG. 1 , the solar cell module 10 includes a first light-transmissive member 11, a second light-transmissive member 12, an intermediate adhesive film 13, and a photovoltaic cell 15. The first light-transmissive member 11 and the second light-transmissive member 12 are translucent plate-like members, and can typically be made using glass plates or a resin material. In the following embodiment, a case where the first light-transmissive member 11 and the second light-transmissive member 12 are made of glass plates will be described. In the following, the first light-transmissive member 11 and the second light-transmissive member 12 will also be referred to as the first glass plate 11 and the second glass plate 12. In this embodiment, the solar cell module 10 (laminated glass) can be suitably used as a building material, such as a glass window in a building.

[0027] The thickness of each of the first glass plate 11 and the second glass plate 12 is, for example, 2 mm or more and 12 mm or less. For example, chemically strengthened glass may be used as the first glass plate 11 and the second glass plate 12. When chemically strengthened glass is used, the first glass plate 11 and the second glass plate 12 can be made lighter while maintaining their strength. In the present embodiment, air-cooled tempered glass may be used as the first glass plate 11 and the second glass plate 12. For example, the first glass plate 11 is disposed on the outdoor side of the building, and the second glass plate 12 is disposed inside the building. In this case, the first glass plate 11 is disposed on the light-receiving side of the photovoltaic cell 15, and the second glass plate 12 is disposed on the non-light-receiving side of the photovoltaic cell 15.

[0028] 1 , the intermediate adhesive film 13 is disposed between the first glass plate 11 and the second glass plate 12, and bonds the first glass plate 11 and the second glass plate 12 together. For example, when forming the solar cell module 10, the first glass plate 11, the intermediate adhesive film 13, the solar cell 15, the intermediate adhesive film 13, and the second glass plate 12 are laminated in this order, and the laminate is heated and pressurized to bond them together, thereby forming the solar cell module 10. At this time, the intermediate adhesive films 13 disposed on both sides of the solar cell 15 in the thickness direction are heated and melted, so that the completed solar cell module 10 consists of a single layer of intermediate adhesive film 13.

[0029] The thickness of the intermediate adhesive film 13 is, for example, 0.38 mm or more and 4.56 mm or less. The intermediate adhesive film 13 may be made of EVA (ethylene-vinyl acetate copolymer) resin, PVB (polyvinyl butyral) resin, ionomer resin, COP (cycloolefin polymer), polyurethane, PVC (polyvinyl chloride), POE (polyolefin elastomer), TPO (olefin-based thermoplastic elastomer), or the like. The intermediate adhesive film 13 may also be made of a combination of these materials.

[0030] The photovoltaic cells 15 are provided between the first glass plate 11 and the second glass plate 12. Specifically, the photovoltaic cells 15 are encapsulated inside an intermediate adhesive film 13 provided between the first glass plate 11 and the second glass plate 12. As shown in FIG. 2 , the photovoltaic cells 15 are arranged in an array in the horizontal and vertical directions when the solar cell module 10 is viewed in a plan view. FIG. 2 shows, as an example, a configuration in which a plurality of photovoltaic cells 15 are arranged in an array of four cells in the horizontal direction and six cells in the vertical direction (i.e., a 4×6 array). Note that the configuration shown in FIG. 2 is just an example, and the number of photovoltaic cells 15 arranged in the horizontal and vertical directions can be determined as desired.

[0031] The photovoltaic cells 15 can be configured using photovoltaic cells of silicon-based single crystal type, silicon-based polycrystalline type, amorphous silicon type, thin film silicon type, CIGS type, organic thin film type, dye-sensitized type, perovskite type, or the like. In the configuration example shown in FIG. 2 , each photovoltaic cell 15 has a rectangular shape. For example, each photovoltaic cell 15 may have a square, rectangular, or circular shape. Furthermore, for example, a monofacial photovoltaic cell may be used as the photovoltaic cell 15. In this case, the photovoltaic cell 15 is arranged so that the light-receiving surface faces outward (toward the first glass plate 11). Furthermore, a bifacial photovoltaic cell may be used as the photovoltaic cell 15.

[0032] The photovoltaic power generation cells 15 inside the solar cell module 10 are connected to each other by interconnectors (not shown). Furthermore, the power generated by the solar cell module 10 is extracted using bus bar wirings 21_1 and 21_2. Specifically, as shown in FIG. 1 , the bus bar wirings 21 are pulled out from the ends of the solar cell module 10, and the pulled out bus bar wirings 21 are connected to the terminal box 30. Note that in this specification, the bus bar wirings 21_1 and 21_2 are also collectively referred to as bus bar wirings 21. The same applies to the other components.

[0033] For example, one end of the bus bar wiring 21 is connected to an interconnector connected to the photovoltaic cell 15. The other end of the bus bar wiring 21 is connected to a terminal box. Thus, the photovoltaic cell 15 is connected to the terminal box via the bus bar wiring 21.

[0034] Fig. 3 is a diagram illustrating a configuration example of a terminal box provided in a solar power generation system according to an embodiment. In Fig. 3, the lid is removed to illustrate the inside of the terminal box. As shown in Fig. 3, a terminal box 30 includes electrode terminals 31_1 and 31_2, a terminal block 33, a bypass diode 34, and output cables 35_1 and 35_2.

[0035] 3, the electrode terminals 31_1 and 31_2 are fixed to a terminal block 33. The bus bar wirings 21_1 and 21_2 taken out from the solar cell module 10 (see FIG. 1) are connected to the electrode terminals 31_1 and 31_2, respectively.

[0036] In the present embodiment, the busbar wirings 21_1 and 21_2 may be detachably connected to the electrode terminals 31_1 and 31_2, respectively. For example, the busbar wirings 21_1 and 21_2 may be fixed to the electrode terminals 31_1 and 31_2 using solders 32_1 and 32_2. Alternatively, the busbar wirings 21_1 and 21_2 may be fixed to the electrode terminals 31_1 and 31_2 using clips (not shown). Alternatively, the busbar wirings 21_1 and 21_2 may be fixed to the electrode terminals 31_1 and 31_2 using screws (not shown).

[0037] 3, the electrode terminals 31_1 and 31_2 are electrically connected to output cables 35_1 and 35_2, respectively. Therefore, the power generated by the solar cell module 10 is output to the outside via the output cables 35_1 and 35_2.

[0038] For example, the bus bar wiring 21_1, the electrode terminal 31_1, and the output cable 35_1 are on the positive side, and in this case, the bus bar wiring 21_1 is connected to the positive side of the photovoltaic cell. Also, the bus bar wiring 21_2, the electrode terminal 31_2, and the output cable 35_2 are on the negative side, and in this case, the bus bar wiring 21_2 is connected to the negative side of the photovoltaic cell.

[0039] Furthermore, a bypass diode 34 is provided between the positive electrode terminal 31_1 and the negative electrode terminal 31_2. This allows current to pass through the bypass diode 34 without passing through the photovoltaic cell 15 (solar cell module 10) in the event of a failure in the photovoltaic cell 15. In other words, when the output cables 35_1, 35_2 are connected to other solar cell modules, if the photovoltaic cell 15 included in the solar cell module 10 fails, current will no longer flow through the solar cell module 10, affecting the other solar cell modules. On the other hand, when the bypass diode 34 is provided, if the photovoltaic cell 15 fails, the bypass diode 34 passes current from the positive electrode terminal 31_1 to the negative electrode terminal 31_2, preventing the failure from affecting the other solar cell modules.

[0040] In this embodiment, as shown in FIG. 1 , the terminal box 30 is provided at a position spaced apart from the solar cell module 10. That is, if the terminal box is provided at the end of the solar cell module, when the solar cell module is installed in a building or the like, the terminal box may be placed in a location that is difficult for people to access, such as the ceiling of the building. This poses a problem in that maintenance of the terminal box becomes difficult. In contrast, in this embodiment, the terminal box 30 is provided at a position spaced apart from the solar cell module 10. Therefore, it is possible to provide a solar power generation system in which maintenance of the terminal box can be easily performed.

[0041] Next, an installation example (configuration example) of the solar power generation system according to this embodiment will be described with reference to FIGS.

[0042] Fig. 4 is a cross-sectional view showing an example of installation of a photovoltaic power generation system according to an embodiment. Fig. 4 shows a cross-sectional view between a lower floor and an upper floor on a window side of a structure such as a building. In Fig. 4, the structure is formed using a steel frame 43, a wall surface 44, etc. A space 46 is formed between a ceiling 41 of the lower floor and a floor 45 of the upper floor.

[0043] In the configuration example shown in Fig. 4, the solar cell module 10 is placed between the ceiling 41 and floor 45 (the floor on the same floor as the ceiling 41) of a building. In other words, the solar cell module 10 is configured as a glass window in which photovoltaic cells 15 are provided. In the configuration example shown in Fig. 4, the glass window is configured using double-glazed glass that includes the solar cell module 10, a glass plate 16, and a spacer 17 provided between the solar cell module 10 and the glass plate 16. Note that the configuration example shown in Fig. 4 is just one example, and in this embodiment, the glass plate 16 and the spacer 17 may be omitted, and the glass window may be configured using the solar cell module 10 (laminated glass).

[0044] In this embodiment, as shown in Fig. 4, the terminal box 30 is disposed in a space 46 formed between a ceiling 41 of a lower floor and a floor 45 of an upper floor. Also, as shown in Fig. 4, an inspection hatch 42 is provided in the ceiling 41, and the terminal box 30 is disposed near the inspection hatch 42. Here, the vicinity of the inspection hatch 42 refers to an area, based on the inspection hatch 42, that allows a worker to perform maintenance on the terminal box 30 through the inspection hatch 42.

[0045] As described above, in the configuration example shown in FIG. 4 , the terminal box 30 is disposed near the inspection hatch 42 provided in the ceiling 41. Therefore, workers can easily perform maintenance on the terminal box 30 through the inspection hatch 42. In other words, in the prior art, the terminal box was fixed to the end of the solar cell module, and was disposed at the position indicated by reference numeral 100 in FIG. 4 . In this case, the distance from the inspection hatch 42 was far, making it difficult for workers to perform maintenance on the terminal box. In contrast, in the present embodiment, the bus bar wiring 21 is extended from the solar cell module 10, and the terminal box 30 is disposed near the inspection hatch 42. Therefore, a solar power generation system can be provided in which maintenance of the terminal box 30 can be easily performed.

[0046] Fig. 5 is a cross-sectional view showing an example of installation of a solar power generation system according to an embodiment. Fig. 5 differs from the example configuration shown in Fig. 4 in that a connector 23 is provided at the end of the solar cell module 10. The rest of the configuration is the same as the example configuration shown in Fig. 4, so a duplicated description will be omitted.

[0047] 5, a connector 23 is provided at an end of the solar cell module 10. The bus bar wiring 21 connected to the solar power generation cell 15 is connected to one end of the connector 23. The other end of the connector 23 is connected to the terminal box 30 via the bus bar wiring 21. The connector 23 has, for example, an L-shaped cross section.

[0048] The connector 23 may be fixed to the end of the solar cell module 10 using, for example, an adhesive or the like. The shape of the connector 23 may be a shape other than an L-shaped cross section. If the bus bar wiring 21 were directly extracted from the solar cell module 10, force would be applied to the bus bar wiring 21 at the end of the solar cell module 10, which could cause deterioration of the bus bar wiring 21. In contrast, if the connector 23 is provided, the strength of the bus bar wiring 21 at the end of the solar cell module 10 can be increased, thereby preventing deterioration of the bus bar wiring 21.

[0049] Fig. 6 is a front view showing an example of installation of a solar power generation system according to an embodiment. As shown in Fig. 6, the solar cell module 10 is configured as a glass window, and a sash 51 is provided around the glass window. The sash 51 is provided with a housing 52 that can be opened and closed from inside the room, and the terminal box 30 is housed in the housing 52.

[0050] For example, the sash 51 is made of a metal material such as aluminum. The housing portion 52 can be formed by forming a recess in the sash 51. The housing portion 52 houses the terminal box 30 shown in FIG. 3 . The housing portion 52 is also provided with a removable lid. When a worker performs maintenance on the terminal box 30, the worker can access the terminal box 30 by removing the lid from the sash 51.

[0051] In the configuration example shown in Fig. 6, the terminal box 30 is provided in a housing portion 52 provided in a sash 51. Therefore, it is possible to provide a photovoltaic power generation system in which maintenance of the terminal box can be easily performed.

[0052] Fig. 7 is a plan view showing an example of installation of a photovoltaic power generation system according to an embodiment. Fig. 7 shows a plan view of a specific floor of a structure such as a building, and shows the arrangement of multiple pillars 61, multiple glass windows 62a to 62f, and multiple walls 63. Note that hereinafter, the glass windows 62a to 62f will also be collectively referred to as glass windows 62.

[0053] In the configuration example shown in FIG. 7 , glass windows 62a to 62f of a building can be configured using, for example, the solar cell modules 10 shown in FIG. 1 . A pipe space 65 is also provided in the building, and a terminal box 30 is provided within the pipe space 65. Each solar cell module 10 (glass window 62) and the terminal box 30 are connected using bus bar wiring 21 (not shown). For example, the bus bar wiring 21 (not shown) extending from the solar cell module 10 (glass window 62) is connected to the terminal box 30 provided within the pipe space 65 via the ceiling. Providing the terminal box 30 within the pipe space 65 in this manner facilitates maintenance of the terminal box 30. In the configuration example shown in FIG. 7 , for example, multiple terminal boxes 30 corresponding to the three solar cell modules 10 (glass windows 62a to 62c) located at the top of the page may be housed within the pipe space 65. In this case, bus bar wiring 21 (not shown) taken out from each solar cell module 10 (glass windows 62a to 62c) passes through the ceiling and is connected to each terminal box 30 provided in the pipe space 65. Each terminal box 30 may be connected in series within the pipe space 65. In this way, the multiple solar cell modules 10 (glass windows 62a to 62c) are connected in series.

[0054] In the configuration example shown in FIG. 7 , a distribution board 66 is provided inside the building, and the terminal box 30 is provided inside the distribution board 66. Each solar cell module 10 (glass window 62) and the terminal box 30 are connected using bus bar wiring 21 (not shown). For example, the bus bar wiring 21 (not shown) extending from the solar cell module 10 (glass window 62) is connected to the terminal box 30 provided inside the distribution board 66 via the ceiling. By providing the terminal box 30 in the distribution board 66 in this manner, maintenance of the terminal box 30 is facilitated. In the configuration example shown in FIG. 7 , for example, the distribution board 66 may accommodate multiple terminal boxes 30 corresponding to the three solar cell modules 10 (glass windows 62d to 62f) arranged on the lower side of the drawing. In this case, the bus bar wiring 21 (not shown) extending from each solar cell module 10 (glass windows 62d to 62f) is connected to each terminal box 30 provided inside the distribution board 66 via the ceiling. The terminal boxes 30 may be connected in series within the switchboard 66. This allows the plurality of solar cell modules 10 (glass windows 62d to 62f) to be connected in series.

[0055] Fig. 8 is a cross-sectional view showing an example of installation of a solar power generation system according to an embodiment. In the installation example shown in Fig. 8, the solar cell module 10 is arranged on the indoor side of a glass window 72 of a structure 71 such as a building so as to face the glass window 72. In other words, the solar cell module 10 is arranged so as to face the existing glass window 72. The solar cell module 10 is fixed using a support member (not shown). In the configuration example shown in Fig. 8, the solar cell module 10 can be retrofitted to the existing glass window 72.

[0056] In the configuration example shown in Fig. 8, bus bar wiring 21 is extended from solar cell module 10, and terminal box 30 is disposed at a position spaced apart from solar cell module 10. This allows for easy maintenance of the terminal box. Furthermore, in the installation example shown in Fig. 8, if terminal box 30 were directly attached to solar cell module 10, terminal box 30 may get in the way. In this embodiment, terminal box 30 is disposed at a position spaced apart from solar cell module 10, and therefore, terminal box 30 is prevented from getting in the way.

[0057] 8 shows a configuration example in which the bus bar wiring 21 is led out from the top of the solar cell module 10, but the position from which the bus bar wiring 21 is led out can be determined arbitrarily. For example, the bus bar wiring 21 may be led out from the bottom or side of the solar cell module 10. In this case, the bus bar wiring 21 can be prevented from becoming an obstacle.

[0058] In the configuration example shown in FIG. 9 , the solar cell module 10 is arranged in a spandrel portion 92 of a building 80. In the configuration example shown in FIG. 9 , the building 80 is composed of a steel frame 81, a skeleton 82, and a curtain wall 83. The upper and lower floors are separated by the skeleton 82. An interior space 86 and a boundary portion 87 are formed between the skeleton 82 of the upper floor and the skeleton 82 of the lower floor. The boundary portion 87 is a portion located at the boundary between the upper and lower floors of the building 80, and is located between the interior space 86 of the upper floor and the interior space 86 of the lower floor. The interior space 86 is a usable space of the building 80, and is located between the upper and lower boundary portions 87. A ceiling 84 is provided above the interior space 86.

[0059] The curtain wall 83 is a plate-like member that separates the interior space 86 from the outside, and can typically be constructed using glass plates. The curtain wall 83 includes a vision section 91 and a spandrel section 92. The vision section 91 is the section of the curtain wall 83 that corresponds to the interior space 86 and allows the outside to be seen from the interior space 86. The spandrel section 92 is the section of the curtain wall 83 that corresponds to the boundary section 87.

[0060] In the configuration example shown in Fig. 9, the solar cell module 10 is arranged in the spandrel portion 92. The boundary portion 87 corresponding to the spandrel portion 92 is basically an area where people are not allowed to enter. Therefore, by arranging the solar cell module 10 in the spandrel portion 92, the solar cell module 10 can be installed on the curtain wall 83 without blocking people's view.

[0061] In the configuration example shown in Fig. 9 , similar to the case shown in Fig. 4 , the terminal box 30 is disposed at a boundary portion 87 between the ceiling 84 of the lower floor and the frame (floor) 82 of the upper floor. As shown in Fig. 9 , an inspection hatch 85 is provided at the boundary portion 87 (ceiling 84), and the terminal box 30 is disposed near the inspection hatch 85. Here, the vicinity of the inspection hatch 85 refers to an area within which a worker can perform maintenance on the terminal box 30 through the inspection hatch 85, based on the inspection hatch 85.

[0062] In this way, arranging the terminal box 30 near the inspection hatch 85 improves the maintainability of the terminal box 30. In this embodiment, a solar cell module may be configured by attaching a film-like photovoltaic cell to the spandrel portion 92.

[0063] The present invention has been described above in accordance with the above-mentioned embodiment, but the present invention is not limited to the configuration of the above-mentioned embodiment, and naturally includes various modifications, alterations, and combinations that a person skilled in the art can make within the scope of the invention as defined in the claims of this application.

[0064] This application claims priority based on Japanese Patent Application No. 2024-004178, filed January 15, 2024, the disclosure of which is incorporated herein by reference in its entirety.

[0065] REFERENCE SIGNS LIST 1 Photovoltaic power generation system 10 Solar cell module 11 First translucent member (first glass plate) 12 Second translucent member (second glass plate) 13 Intermediate adhesive film 15 Photovoltaic cell 21 Bus bar wiring (wiring) 23 Connector 30 Terminal box 31, 31_1, 31_2 Electrode terminal 32_1, 32_2 Solder 33, 33_1, 33_2 Terminal block 34 Bypass diode 35, 35_1, 35_2 Output cable 41 Ceiling 42 Inspection hatch 43 Steel frame 44 Wall surface 45 Floor 46 Space 51 Sash 52 Storage section 61 Pillar 62a to 62f Glass window 63 Wall 65 Pipe space 66 Distribution board 71 Building 72 Glass window 81 Steel frame 82 Body 83 Curtain wall 84 Ceiling 85 Inspection hatch 86 Interior space 87 Boundary 91 Vision section 92 Spandrel section

Claims

1. A solar power generation system comprising a solar cell module equipped with a photovoltaic cell, and a terminal box connected to the photovoltaic cell via wiring, wherein the terminal box is provided at a position separated from the solar cell module.

2. The solar power generation system according to claim 1, wherein the solar cell module is disposed between the ceiling and the floor of a building and is composed of a glass window provided with the photovoltaic cell.

3. The solar power generation system according to claim 1, wherein the solar cell module is composed of modules arranged so as to face a glass window of a building.

4. The solar power generation system according to claim 1, wherein the solar cell module is disposed in a spandrel portion of a building.

5. An inspection opening is provided at a boundary portion corresponding to the ceiling or the spandrel portion, and the terminal box is provided in the vicinity of the inspection opening. The solar power generation system according to claim 2 or 4.

6. A sash is provided around the glass window, an accommodating portion that can be opened and closed from the interior is provided in the sash, and the terminal box is accommodated in the accommodating portion. The solar power generation system according to claim 2.

7. A switchboard is provided in the interior of the building, and the terminal box is provided in the switchboard. The solar power generation system according to any one of claims 2 to 4.

8. A pipe space is provided in the building, and the terminal box is provided in the pipe space. The solar power generation system according to any one of claims 2 to 4.

9. The wiring is busbar wiring, the busbar wiring is drawn out from an end portion of the solar cell module, and the drawn-out busbar wiring is connected to the terminal box. The solar power generation system according to any one of claims 1 to 4.

10. The terminal box includes a plus-side electrode terminal connected to the plus-side wiring of the solar cell, a minus-side electrode terminal connected to the minus-side wiring of the solar cell, and a bypass diode connected between the plus-side electrode terminal and the minus-side electrode terminal. The bypass diode is configured to allow current to flow from the plus-side electrode terminal to the minus-side electrode terminal when the solar cell fails. The solar power generation system according to any one of claims 1 to 4.

11. The plus-side wiring of the solar cell is detachably connected to the plus-side electrode terminal, and the minus-side wiring of the solar cell is detachably connected to the minus-side electrode terminal. The solar power generation system according to claim 10.

12. The terminal box further includes a plus-side output cable electrically connected to the plus-side electrode terminal and a minus-side output cable electrically connected to the minus-side electrode terminal. The solar power generation system according to claim 10.

13. A connector is provided at an end of the solar cell module. The bus bar wiring connected to the solar cell is connected to one end of the connector, and the other end of the connector is connected to the terminal box via the wiring. The solar power generation system according to any one of claims 1 to 4.

14. The connector has an L-shaped cross section. The solar power generation system according to claim 13.

Images