JP2004011172A - Roofing-integrated solar cell module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a roofing-integrated solar cell module which does not mar the appearance of a roof, is free from a fear of infiltration of rainwater into a solar cell, and has an improved wiring structure so as to facilitate the connection thereof to external wires. <P>SOLUTION: The roofing-integrated solar cell module 2 is formed by integrating the solar cell 7 covered with a sealing material and a surface protective material with a roofing block 8 doubling as a module stand, drawing output lead wires 5, 6 of the solar cell from the roofing block, and connecting the lead wires to the external wires 3, 4 laid on a rear surface of the module. The solar cell module 2 is connected to the solar cell module adjacent thereto via edge-bent engaging portions 8a, 8c formed along the outer edge of the roofing block. Herein, the output lead wires 5, 6 are drawn in a sideways direction of the roofing block, across the edge-bent engaging portions. Further they are drawn to the rear of the adjacently arranged modules which are coupled to each other, through a gap between the edge-bent engaging portions, and then connected to the external wires 3, 4. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a roof material-integrated solar cell module for photovoltaic power generation which is mounted on a roof of a house and converts solar energy into electricity, and more particularly to a wiring structure for extracting a power generation output of the solar cell module.
[0002]
[Prior art]
In recent years, solar cells have been attracting attention as a clean energy source due to global environmental problems, and the introduction of a solar power generation system that installs solar cell modules here using the roof of a house is a national subsidy policy. It is progressing rapidly.
[0003]
In addition, as a form, a method of installing a solar cell module by mounting a base on an existing roof is also known, but recently, a solar cell module itself is provided with a function of a roofing material in terms of aesthetics and design. The use of roofing-integrated solar cell modules that are directly attached to a roof base plate has been widespread.
[0004]
This roof material-integrated solar cell module is, for example, a solar cell in which a photoelectric conversion element in which an amorphous silicon layer, a collecting electrode, a transparent electrode, and the like are formed on a plastic film substrate is sealed with a sealing material and a surface protection material. The roof material block has a structure in which a solar cell output lead wire is drawn out from the roof material block after being integrated with a plate-shaped roof material block (metal tile plate) also serving as a module base. In the same manner as a normal metal tile plate, an edge bending engagement portion is formed along the periphery thereof, and when arranging solar cell modules in an array and laying it on a roof, via the edge bending engagement portion It is connected to the roof material block of the adjacent solar cell module so that it has the same rainfall function as a normal roof tile, and the solar cells drawn from each solar cell module Connect the lead wires to external wiring such as cables, guide them to a power conditioner (inverter device) installed indoors, convert the electricity (DC) generated by the solar cells into AC, and supply power to loads used in houses, and The system is connected to a commercial power supply.
[0005]
Next, FIG. 11 is a schematic diagram showing a basic layout of a roof material-integrated solar cell module to be roofed on a house roof and a wiring structure thereof. In the drawing, 1 is a roof base plate, 2 is a roof-integrated solar cell module, and 3 and 4 are external wirings (cables or dedicated wirings) for the positive and negative poles connected to each solar cell module 1. The external wires 3 and 4 are routed and wired so as to sew between a large number of solar cell modules 2 which are arranged in an array and laid on the surface of the base plate 1. The positive and negative output leads 5 and 6 drawn from each solar cell module 1 are connected to the external wirings 3 and 4 in parallel.
[0006]
In this case, if the external wirings 3 and 4 connected to each solar cell module 2 are exposed and routed to the roof surface side, the external wirings may be exposed to the public and impair the aesthetics of the building. The external wirings 3 and 4 were laid on the back side of the roof material-integrated solar cell module 2 laid on the roof so as not to be exposed to the public, and the external wirings 3 and 4 were pulled out from each solar cell module 2 to the back side. A wiring system in which the output leads 5 and 6 are connected is employed.
[0007]
Next, FIGS. 12A and 12B show examples of a conventional structure of the solar cell module 2 corresponding to the above-described wiring method. In the figure, 7 is a solar cell, 8 is a roofing material block (metal tile plate also serving as a module base) integrated with the solar cell 7, and 9 is a terminal box of the module. Here, in the solar cell 7, the upper and lower surfaces of the photoelectric conversion element 7a are sealed with sealing materials (EVA (ethylene vinyl acetate)) 7b and 7c, and a light-transmitting weatherproof material (ETFE (ETFE) This solar cell 7 is laminated on the upper surface of a metal (or hard plastic) roofing material block 8 and integrated using a vacuum laminator or the like. In addition, the roof material block 8 is formed with edge bending engaging portions 8a to 8d which are bent in a U-shape around the periphery thereof in the same manner as a general metal tile plate. The bent engagement portions are engaged so as to be entangled with each other and connected to a roof material block of an adjacent solar cell module, so that rain is prevented from penetrating into the back side through a joint between the modules. Roofing material The lock 8 is a nail holes drilled in the ears to nailed to sheathing 1 (see FIG. 11) of the roof.
[0008]
On the other hand, the terminal box 9 is mounted at the center on the back side of the roofing material block 8, and the output lead wires 5, 6 connected to the output electrodes of the photoelectric conversion elements 7 a are pierced through the bottom surface of the roofing material block 8. Through to the terminal box 9 where they are connected to the cables 10 and 11 for connection to external wiring. Reference numerals 10a and 11a denote connection terminals for connection to the external wirings 3 and 4 shown in FIG. 11, and reference numeral 12 denotes a case where rainwater infiltrates from outside into the lead wire holes formed in the terminal box 9 and drilled in the roofing material block 8. It is a sealing resin for preventing the formation of the resin.
[0009]
[Problems to be solved by the invention]
In the conventional solar cell module 2 shown in FIGS. 12A and 12B, the output lead wires 5 and 6 of the solar cell 7 are drawn out to the back side of the module and connected to external wiring. Although the wiring member is not visible to the public after the solar cell module is laid on the roof, the following problems remain in terms of weather resistance and reliability.
[0010]
That is, since the terminal box 9 is installed on the back surface of the roof member block 8, in order to pull out the output lead wires 5 and 6 to the terminal box 9, a through hole is formed in the bottom surface of the roof material block 8 and a lead is inserted there. You need to pass through the line. Therefore, in this state, there is a possibility that rainwater sneaking from the outside through the hole may enter and penetrate into the solar cell 7 through the output lead wires 5 and 6. Therefore, in the conventional structure, a measure is taken to prevent the infiltration of water into the solar cell 7 by filling the terminal box 9 with the sealing resin 12 as shown.
[0011]
However, when the solar cell module is used for a medium to long term of 10 to 20 years, the sealing function of the sealing resin 12 filled in the terminal box 9 is deteriorated due to aging, a heat cycle accompanying a change in temperature, and the like. Is inevitable. For this reason, rainwater that has entered from the outside penetrates through the lead holes formed in the bottom surfaces of the terminal box 9 and the roofing material block 8 and penetrates into the solar cell 7 to corrode the material forming the photoelectric conversion element 7a. As a result, there is a problem that the insulation resistance is reduced, peeling or cracks are generated, and the power generation performance is reduced.
[0012]
In addition, among the many operation results of solar cell modules over a long period of time, the results of investigations on the cause of the decrease in the power generation performance confirmed that the most trouble cases caused by water penetration from the terminal box were confirmed. I have.
[0013]
The present invention has been made in view of the above points, there is no risk of impairing the appearance after construction laid on the roof, and there is no risk of rainwater infiltrating the interior of the solar cell even in medium- and long-term use, and An object of the present invention is to provide a highly reliable roof material-integrated solar cell module having an improved wiring structure so that wiring can be easily performed when laid on a roof.
[0014]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, a solar cell in which a photoelectric conversion element is sealed with a sealing material and a surface protection material is overlapped on the upper surface of a plate-shaped roof material block also serving as a module base. A roof material-integrated solar cell module that is integrated and has an output lead wire connected to a solar cell drawn out from the roof material block, wherein the roof material block forms an edge bending engagement portion along a periphery thereof, In one that is connected to a roof material block of an adjacent solar cell module via a bending engagement portion,
In the first invention, for each module, an output lead wire connected to a solar cell is drawn in a direction traversing the edge bending engagement portion to a side of the roof material block, and a roof material block of an adjacent solar cell module is drawn. In the state of being connected, the leading end of the output lead wire is drawn out to the back side of the module with the edge bending engagement portion overlapping each other as a wiring path, and is connected to the external wiring wired here (claim) Item 1).
[0015]
According to the above configuration, the output lead wire of the solar cell is connected to the adjacent solar cell module without being drilled with a through-hole for leading the lead wire to the roof material block itself. Through the roof material block, and can be connected to external wiring laid on the back side of the module at this position. As a result, the output lead wires of the solar cell module and the external wiring sewn between the modules and laid on the roof are not exposed to the light receiving surface of the module and do not impair the aesthetic appearance. Since there is no through hole through which the solar cell module passes, unlike the conventional structure, there is no danger of rainwater penetrating from the outside into the solar cell through the through hole, and the reliability of the solar cell module is improved.
[0016]
Further, as an embodiment of the above configuration, the output lead wires are made of a flexible conductive metal plate or a metal foil, and the peripheral surfaces thereof are covered with an elastic weatherproof material (claim 2). When connecting to the roofing block of the solar cell module, even if the edge bending engagement parts are overlapped and brought into close contact with each other under pressure, the elastic protection material covering the output lead wire will make the connection part rain-proof and high. Weather resistance can be ensured.
[0017]
Further, in the second invention, for each module, a mother wire is laid inside the edge bending engagement portion formed on the peripheral edge of the roofing material block, and an output lead wire drawn from the solar cell is connected to the mother wire. After connecting both ends of the mother wiring to the corners of the roofing material block, connect the mother wirings drawn from each module when connecting with the roofing material block of the adjacent solar cell module by cascade connection (Claim 3).
[0018]
According to this configuration, similarly to the first invention, since there is no hole for passing the output lead wire of the solar cell in the roofing material block, aesthetics and reliability can be ensured. At the time of construction, when connecting with the solar cell modules arranged in an array, the connection terminals (connectors) of the mother wiring, which are pre-installed inside the roofing material block for each module, are cascaded sequentially. Thus, the external wiring for one row of the solar cell module can be completed without using another external wiring, and the external wiring work performed at the construction site can be easily performed.
[0019]
Further, there is the following configuration as an embodiment of the second invention described above.
[0020]
(1) For each solar cell module, a mother wiring is laid along a wiring path in a concave groove formed on the bottom surface of the roofing material block (claim 4). With this configuration, a step in the height direction is secured between the mother wiring and the solar cell mounted on the roofing material block, and the output lead wires drawn laterally from the solar cell body in the module assembling process are used as conductors of the mother wiring. It can be easily connected (soldered) by superimposing it on the top surface.
[0021]
(2) The mother wiring and the solar cell and the output lead are collectively sealed with a protective material (claim 5). With this configuration, at the time of manufacture, these members can be integrated and mounted and joined to the roofing material block in the same process, and the high insulation and weather resistance of the mother wiring can be ensured.
[0022]
(3) Further, the mother wiring is laid in a vertical direction with respect to the roofing material block (claim 6), or is laid in a horizontal direction with respect to the roofing material block (claim 7).
[0023]
As described above, by preparing two types of modules in which the laying direction of the mother wiring built in the roof material-integrated solar cell module is set vertically or horizontally, the shape of the house roof and the roof can be roofed. In addition, it is possible to select a type of module that is advantageous for external wiring according to the situation at the site, such as the number of modules and their arrangement pattern.
[0024]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the illustrated examples shown in FIGS. In each of the illustrated embodiments, the same members corresponding to FIGS. 11 and 12 are denoted by the same reference numerals, and detailed description thereof will be omitted.
[0025]
[Example 1]
First, an embodiment corresponding to claims 1 and 2 of the present invention will be described with reference to FIGS. In this embodiment, as shown in FIGS. 1A and 1B, a roof material block (metal tile plate) 8 integrated with a solar cell 7 has a U-shape whose left and right side edges are bent backward. The edge bending engagement portions 8a and 8c are formed, and when the solar cell module 2 is laid on the roof, the edge bending engagement portions 8a and 8c are interposed between the roof material block 8 of the adjacent solar cell block 2. Are entangled and connected.
[0026]
Further, as shown in FIG. 3, the output lead wires 5 and 6 of the positive and negative poles are drawn out from the solar cell 7 to the side. The output lead wires 5 and 6 are made of a flexible thin copper plate or copper foil having a thickness of about 0.4 mm, and the peripheral surfaces thereof are insulated and protected by, for example, PET (polyethylene terephthalate), and one end is provided. It is joined to the output electrode of the solar cell 7. Further, in the assembled state of the module in which the solar cell 7 is overlapped on the upper surface of the roofing material block 8, the output lead wires 5, 6 drawn from the solar cell 7 are attached to the inner surface of the edge bending engagement portion 8 a. And pull it out to the side of the module from the direction crossing the engaging portion.
[0027]
When connecting with the adjacent solar cell module 2, as shown in FIG. 1B, the overlap between the edge bending engagement portion 8 a and the edge bending engagement portion 8 c of the adjacent module engaged with the edge bending engagement portion 8 a The output lead wires 5 and 6 are sandwiched between the edge bending engagement portions 8a and 8c, and are drawn to the back surface side of the adjacent solar cell module 2 using the surface as a wiring path.
[0028]
On the other hand, when a large number of solar cell modules 2 are arranged in an array and roofed thereon, as shown in FIG. , 4 are connected in advance, and the output lead wires 5, 6 drawn out to the back side in the state of connection with the adjacent module as described above are connected to the external wires 3, 4 corresponding to the polarities (+,-). .
[0029]
According to this wiring structure, the roof material block 8 of the solar cell module 2 is not pierced in the lead wire drawing hole as in the conventional structure (see FIG. The output lead wires 5, 6 can be drawn out to the back side of the module through the space between the bending engagement portions 8a and 8c, and can be connected to the external wirings 3, 4. Moreover, in the connected state of the modules, the bendable engagement portions 8a and 8c are entangled and tightly engaged with each other as shown in the figure, and the wiring paths of the output lead wires 5 and 6 sandwiched therebetween become maze-shaped. There is no impairment of the rain closing function.
[0030]
In the roofing work, in order to reliably prevent rainwater from entering from a joint between adjacent modules, the edge bending engaging portions 8a and 8c are strongly fastened to the connecting portion in a state where the edge bending engaging portions 8a and 8c are connected. As a result, the output leads 5 and 6 are strongly compressed.
[0031]
Therefore, in order to ensure stable weather resistance and reliability for a long period of time even in such a situation, in the embodiment shown in FIG. The upper and lower surfaces of the drawn output lead wires 5 and 6 are covered with silicone rubber 13 having high weather resistance and elasticity as a protective material. Accordingly, even if the connecting portion between the edge bending engaging portions 8a and 8c is strongly tightened, the elasticity of the silicone rubber 13 does not deteriorate the rain-closing function of the joint between the modules, and the weather resistance is high for a long period of time. And reliability can be ensured.
[0032]
[Example 2]
Next, a third embodiment of the present invention will be described with reference to FIGS. In this embodiment, as compared with the conventional solar cell module shown in FIG.
[0033]
That is, as shown in FIGS. 5 to 7, on the bottom surface of the roofing material block 8, a concave groove portion 8 f is formed inside along the edge bending engagement portion 8 a formed on one (left side) side edge thereof. After laying the mother wire 14 in which the two conductors 14a and 14b corresponding to the + and-poles are laid in the concave groove portion 8f, both ends thereof are pulled out to the upper and lower corners of the roofing material block 8. The connection terminal (connector) 15 is attached here. Further, output lead wires 5 and 6 drawn laterally from the solar cell 7 placed on the roofing material block 8 are connected to the conductors 14a and 14b with their polarities matched.
[0034]
In this case, as shown in FIG. 6 and FIG. 7, the output lead wires (copper foil) 5 and 6 drawn laterally from the output terminal of the photoelectric conversion element 7a of the solar cell 7 have their tips positioned one step lower. It is overlapped and joined to the upper surfaces of the conductors 14a and 14b of the laid mother wiring 14. In FIG. 7, the conductor 14a having a different polarity intersecting with the output lead wire 6 is insulated by sandwiching an insulating film 16 on its upper surface. Further, in this embodiment, as described later, in the assembling process of the solar cell 7, the mother wiring 14 and the output lead wires 5, 6 are collectively sealed by the solar cell sealing material 7b.
[0035]
When a large number of solar cell modules 2 are arranged in an array and laid on a roof as described with reference to FIG. 4, the roof material block is provided for each of the solar cell modules 2 between the vertically arranged modules. The connection terminal (connector) 15 of the bus wiring 14 drawn out to the corner of 8 is inserted into the connection terminal of the bus wiring provided in the adjacent module and connected in cascade. As a result, the mother wires 14 are connected in series between the modules arranged in the upper and lower rows to form an external wire. Therefore, it is not necessary to lay another external wiring at the time of construction and to connect the output lead wires between the modules arranged in a line vertically, so that the wiring work at the site can be greatly simplified. Moreover, since all of these wiring members are housed inside the solar cell module 2 and are not exposed on the surface side of the roof, aesthetics and weather resistance can be secured.
[0036]
Next, the manufacturing procedure of the roof material-integrated solar cell module 2 manufactured by the inventors will be described. First, a galvalume steel sheet having a thickness of 0.4 mm is prepared, cut into a predetermined size corresponding to the roofing material block 8, and then a 1.5 mm-depth groove is formed along the wiring path of the mother wiring 14 built in the module. 8f was processed. Thereafter, a sheet of EVA (ethylene vinyl acetate) having a thickness of 0.6 mm is stacked on the steel plate as a sealing material 7b of the solar cell 7 and then soldered as conductors 14a and 14b of the mother wiring 14 to a thickness of 0.1 mm. A 2 mm copper flat plate was arranged and temporarily fixed on the EVA with a double-sided tape. Next, the output electrodes 5 and 6 made of copper foil having a thickness of 0.1 mm soldered to the output electrodes of the film-type solar cell cut to a predetermined size are stacked on the EVA, 6 and the mother wiring 14 laid earlier were soldered. Note that a Kapton sheet having a thickness of 0.5 mm was used as the insulating film 16 shown in FIG. Thereafter, another EVA was laminated separately from the above-mentioned EVA, and a 0.025 mm-thick ETFE (ethylene-tetrafluoroethylene resin) sheet was further laminated thereon as a surface protective material 7d.
[0037]
After that, the temporary assembly is heated by a vacuum laminator for about 40 minutes, and the solar cell 7, the steel plate of the roofing material block 8, and the mother wiring 14 are combined and integrated. It is processed to form edge bending engagement portions 8a to 8d, and plug-in connectors are attached as connection terminals 15 to both ends of the mother wiring 14 finally drawn out at the corners of the roofing material block 8, thereby integrating the roofing material type solar cell module. Was completed.
[0038]
Next, FIGS. 8 and 9 show application examples in which a part of the wiring structure of the roof material-integrated solar cell module 2 is changed. In this embodiment, a two-core flat cable in which two conductors (core wires) 14a and 14b are coated with an insulating PET resin 14c is used as the mother wiring 14, and the core wires are coated at locations where the output leads 5 and 6 are connected. After the insulating coating is removed, it is joined with the solder 17.
[0039]
[Example 3]
FIG. 10 shows an embodiment corresponding to claim 7 of the present invention. That is, in the above-described embodiment shown in FIG. 5, the mother wiring 14 is laid up and down along the edge bending engagement portion 8a on the left edge of the roofing material block 8, whereas in this embodiment, the mother wiring 14 is provided. The wiring 14 is laid inside the edge bending engagement portion 8 b formed on the upper edge side of the roofing material block 8, and both ends thereof are drawn out to the left and right corners of the roofing material block 8. And output lead wires 5 and 6 drawn from the solar cell 7.
[0040]
According to this configuration, as shown in FIG. 4, in a state where a large number of solar cell modules 2 are arranged vertically and horizontally and laid on a roof, the modules arranged in a horizontal line are connected by the mother wiring 14 and externally wired. Can be.
[0041]
As described above, two types of roofing-material-integrated solar cell modules in which the laying direction of the mother wiring 14 housed in the roofing-material-integrated solar cell module 2 is set to the vertical direction in FIG. 4 or the horizontal direction in FIG. By preparing the module, it is possible to select a type of module that facilitates external wiring according to the conditions of the construction site, such as the shape of the roof on which the solar cell module is installed, the number of modules, and the arrangement pattern thereof .
[0042]
【The invention's effect】
As described above, according to the present invention, the following effects can be obtained.
[0043]
(1) According to the first aspect of the present invention, the output lead wire of the solar cell is connected to the adjacent solar cell module without drilling a through hole for leading the lead wire in the roofing material block itself. Then, it can be pulled out to the back side of the roofing material block through between the edge bending engagement portions, and can be connected to external wiring separately laid on the back side of the module at this position. As a result, the output lead wires of the solar cell module and the external wiring sewn between the modules and laid on the roof are not exposed to the light receiving surface of the module and do not impair the aesthetic appearance. Since there is no through hole through which the solar cell module passes, unlike the conventional structure, there is no danger of rainwater penetrating from the outside into the solar cell through the through hole, and the reliability of the solar cell module is improved.
[0044]
(2) According to the second aspect of the present invention, similarly to the first aspect, since the roof material block has no hole for passing the output lead wire of the solar cell, aesthetics and reliability can be ensured. When connecting solar cell modules to an array of solar cell modules when installing the solar cell modules on the roof, connect the mother wiring that has been incorporated in the roofing material block for each module in order. Accordingly, one row of the solar cell module can be interconnected without using another external wiring, and the work of the external wiring performed at the construction site can be greatly simplified.
[0045]
(3) Further, in the second invention, two types of modules are provided in which the orientation of the mother wiring built in the roofing-integrated solar cell module is determined to be vertical in claim 6 and horizontal in claim 7. By preparing the module, it becomes possible to select a module that can be easily wired externally according to the situation at the site, such as the shape of the roof on which the solar cell module is installed, the number of modules, and their arrangement pattern. .
[Brief description of the drawings]
FIG. 1 is a wiring structure diagram of a roofing-material-integrated solar cell module corresponding to Example 1 of the present invention, wherein (a) is a perspective view showing a state where it is connected to an adjacent module, and (b) is a view showing (a). FIG. 2 is an enlarged cross-sectional view taken along line AA of FIG. 2. FIG. 2 is an enlarged cross-sectional view of an embodiment different from FIG. 1B. FIG. 3 is a schematic plan view of a roofing-integrated solar cell module. FIG. 5 is a diagram schematically illustrating an arrangement pattern in which solar cell modules are laid on a roof, and connection with external wiring. FIG. 5 is a configuration diagram of a roof material-integrated solar cell module corresponding to Example 2 of the present invention; (A) is a plan view, (b) is a sectional view taken along line BB of (a). [Fig. 6] An enlarged sectional view taken along line CC of Fig. 5 (a). [Fig. 8 is an enlarged cross-sectional view taken along the line DD in FIG. 8; FIG. 8 is a cross-sectional view of an embodiment different from FIG. 6; FIG. 9 is a cross-sectional view of an embodiment different from FIG. 10 is a configuration diagram of a roofing-material-integrated solar cell module corresponding to Example 3 of the present invention, where (a) is a plan view and (b) is a cross-sectional view taken along the line EE of (a). Wiring diagram showing basic arrangement pattern of roof material integrated solar cell modules laid on the roof and connection relationship between external wiring and each module [FIG. 12] is a configuration diagram of a conventional roof material integrated solar cell module. , (A) is a plan view of the entire module, and (b) is an enlarged cross-sectional view of an arrow P portion in (a).
DESCRIPTION OF SYMBOLS 1 Roof base plate 2 Roof material integrated solar cell module 3, 4 External wiring 5, 6 Output lead wire 7 of a solar cell 7 Solar cell 7a Photoelectric conversion element 7b, 7c Sealing material 7d Surface protection material 8 Roof material block 8a- 8d Edge bending engagement portion 8f Recessed groove portion 14 Mother wires 14a, 14b Mother wire conductor 15 Connection terminal

Claims (7)

A solar cell in which the photoelectric conversion element is sealed with a sealing material and a surface protection material is integrated on a roof material block also serving as a module base, and an output lead wire connected to the solar cell from the roof material block is formed. A roof material integrated solar cell module drawn out, wherein the roof material block forms an edge bending engagement portion along the periphery thereof, and the roof material block of an adjacent solar cell module is formed via the edge bending engagement portion. In what was connected,
The output lead wire connected to the solar cell for each module is drawn out to the side of the roofing material block along the direction traversing the edge bending engagement portion, and is connected to the roofing material block of the adjacent solar cell module. A roof material-integrated solar cell module, wherein a leading end of the output lead wire is drawn out to the back side of the module and connected to an external wiring with a wiring path between overlapping edge bending engagement portions. 2. The roof material-integrated solar cell module according to claim 1, wherein the output lead wire is a flexible conductive metal plate or a metal foil, and its peripheral surface is covered with an elastic weather-resistant protective material. Roofing integrated solar cell module. A solar cell in which the photoelectric conversion element is sealed with a sealing material and a surface protection material is integrated on a roof material block also serving as a module base, and an output lead wire connected to the solar cell from the roof material block is formed. A roof material integrated solar cell module drawn out, wherein the roof material block forms an edge bending engagement portion along the periphery thereof, and the roof material block of an adjacent solar cell module is formed via the edge bending engagement portion. In what was connected,
For each module, a mother wiring is laid along the edge bending engagement portion formed on the periphery of the roofing material block and connected to an output lead wire drawn from the solar cell, and both ends of the mother wiring are roofed. A roof material-integrated solar cell module, wherein the wiring is drawn out to a corner of a material block and cascaded with a mother wiring between adjacent solar cell modules. The roofing-integrated solar cell module according to claim 3, wherein the mother wiring is laid in a groove formed in the bottom surface of the roofing material block along the wiring path. . The roof-integrated solar cell module according to claim 3 or 4, wherein the mother wiring and the solar cell and the output lead wire are collectively sealed with a protective material. The roof integrated solar cell module according to claim 3, wherein the mother wiring is laid up and down with respect to the roof material block. The roof-integrated solar cell module according to claim 3, wherein the mother wiring is laid in a left-right direction with respect to the roofing material block.

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