Roof photovoltaic system

Abstract

The utility model relates to the technical field of photovoltaic power generation, and aims to provide a roof photovoltaic system. According to the roof photovoltaic system, the waterproof performance of the roof is good, wire ends and cables can be protected, and electricity utilization safety is guaranteed. The photovoltaic system comprises a plurality of photovoltaic module units which are adjacently arranged on a roof foundation waterproof layer along a first direction, wherein each photovoltaic module unit comprises a plurality of photovoltaic modules which are sequentially connected along a second direction; the photovoltaic module comprises a profiled plate, a photovoltaic laminated piece and a wiring device, the profiled plate is arranged on the basic waterproof layer, the photovoltaic laminated piece is arranged on the side, away from the basic waterproof layer, of the profiled plate, and the wiring device is arranged on the side close to the basic waterproof layer and electrically connected with the photovoltaic laminated piece. And the wiring devices of the adjacent photovoltaic modules in the first direction are electrically connected. According to the utility model, the problems in the prior art that the water leakage hidden danger exists in the installation of the photovoltaic module and the profiled plate, the waterproof protection of the wire end and the cable cannot be realized, and the potential safety hazard exists are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic power generation, in particular to a roof photovoltaic system. Background Art

[0002] Corrugated sheet has the advantages of high plasticity and high reliability, and is widely used on the roofs of various buildings. The roof can fully receive solar radiation, and there are few surrounding obstructions, which is a better location for setting up photovoltaic modules. Photovoltaic modules are set on corrugated sheets to generate photovoltaic power.

[0003] There are two common ways to install photovoltaic modules on corrugated sheets. One is to install clamps and guide rails on the corrugated sheets, and set the photovoltaic modules on the guide rails and fix them with clamps. However, this method requires drilling holes in the corrugated sheets, causing the risk of water leakage, and the wiring wires and cables are not waterproofed, which poses a safety hazard in rainy weather. The other is to directly stick the photovoltaic modules to the corrugated sheets by gluing, but this method will cause the wiring wires and cables to be exposed on the corrugated sheets, which also poses a safety hazard in rainy weather. Utility Model Content

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the defects of the prior art that photovoltaic components and corrugated sheet materials are installed with the risk of water leakage, and the wire ends and cables cannot be waterproofed, which poses a safety hazard, thereby providing a roof photovoltaic system with good waterproof performance, no water leakage, and the wire ends and cables can also be protected to ensure safe electricity use.

[0005] In order to solve the above problems, the utility model provides a roof photovoltaic system, comprising: a basic waterproof layer arranged on the roof and a plurality of photovoltaic module units arranged adjacent to the basic waterproof layer along a first direction, each of the photovoltaic module units comprising a plurality of photovoltaic modules connected in sequence along a second direction, the first direction is parallel to the width direction of the photovoltaic module, and the second direction is parallel to the length direction of the photovoltaic module;

[0006] The photovoltaic module comprises: a corrugated sheet, a photovoltaic laminate and a wiring device, the corrugated sheet is arranged on the basic waterproof layer, the photovoltaic laminate is arranged on the side of the corrugated sheet away from the basic waterproof layer, the wiring device is arranged on the side of the corrugated sheet close to the basic waterproof layer and is electrically connected to the photovoltaic laminate, and the wiring devices of the photovoltaic modules adjacent along the first direction are electrically connected.

[0007] Optionally, a waterproof roll is provided at a connection between two adjacent photovoltaic modules along the second direction.

[0008] Optionally, connection positions of the photovoltaic components adjacent to each other along the second direction in adjacent photovoltaic component units are staggered.

[0009] Optionally, it further includes fixing members arranged on the base waterproof layer at intervals along the second direction, and the corrugated sheet material is connected to the fixing members.

[0010] Optionally, the fixing member is a tile hanging strip.

[0011] Optionally, a bracket is provided on the fixing member, and the corrugated sheet is connected to the bracket.

[0012] Optionally, the corrugated sheet material includes: a flat plate portion and a bending portion arranged on both sides of the flat plate portion, and the length of the flat plate portion is greater than the length of the bending portion, the corrugated sheets adjacent along the first direction are clamped by the bending portions, and the corrugated sheets adjacent along the second direction are plug-connected by the flat plate portion.

[0013] Optionally, the wiring device includes: a junction box and two wiring terminals, the flat plate portion is provided with a wire groove, the junction box is arranged at the wire groove and is located on the side of the flat plate portion close to the base waterproof layer, the junction box is electrically connected to the photovoltaic laminate, the two wiring terminals are electrically connected to the junction box, and the photovoltaic components adjacent to each other along the first direction are electrically connected through the wiring terminals.

[0014] Optionally, the photovoltaic laminate is bonded to the flat plate portion.

[0015] Optionally, the photovoltaic laminate comprises: a packaging front plate, a first adhesive film, a photovoltaic cell sheet, a second adhesive film and a packaging back plate which are arranged in sequence, and the packaging back plate is bonded to the flat plate portion.

[0016] The utility model has the following advantages:

[0017] 1. The roof photovoltaic system provided by the utility model comprises: a basic waterproof layer arranged on the roof and a plurality of photovoltaic module units arranged adjacent to the basic waterproof layer along a first direction, each photovoltaic module unit comprises a plurality of photovoltaic modules connected in sequence along a second direction, wherein the first direction is parallel to the width direction of the photovoltaic module, and the second direction is parallel to the length direction of the photovoltaic module, and a plurality of photovoltaic modules are arranged along the first direction and the second direction to form a whole photovoltaic system for photovoltaic power generation. A basic waterproof layer is arranged between the photovoltaic module and the roof to improve the waterproof performance of the roof. The specific photovoltaic module comprises: a corrugated sheet, a photovoltaic laminate and a wiring device, the corrugated sheet is arranged on the basic waterproof layer, the photovoltaic laminate is arranged on the side of the corrugated sheet away from the basic waterproof layer, the wiring device is arranged on the side of the corrugated sheet close to the basic waterproof layer, and is electrically connected to the photovoltaic laminate, and is electrically connected to the wiring devices of the adjacent photovoltaic modules along the first direction. This photovoltaic module arranges the wiring device on the back of the corrugated sheet for protection to prevent it from contacting rainwater and causing electrical safety accidents.

[0018] 2. In the roof photovoltaic system provided by the utility model, a waterproof roll is provided at the connection of two adjacent photovoltaic modules along the second direction, that is, a waterproof roll is provided at the connection of two photovoltaic modules connected in each photovoltaic module unit, and the waterproof roll is provided between two profiled plates. By providing the waterproof roll, the connection of the photovoltaic modules is waterproofed, thereby improving the waterproof performance of the roof.

[0019] 3. The roof photovoltaic system provided by the utility model also includes fixings arranged on the basic waterproof layer at intervals along the second direction. The fixings are preferably tile hanging strips, and brackets are arranged on the tile hanging strips. The corrugated sheet is connected to the bracket. Preferably, the corrugated sheet and the bracket are locked by squeezing and deforming the overlapping part of the corrugated sheet and the bracket using a special locking machine. By arranging tile hanging strips and brackets, the space between the corrugated sheet and the roof is increased, which is convenient for arranging wiring devices and can also improve the heat dissipation effect of photovoltaic modules.

[0020] 4. The roof photovoltaic system provided by the utility model comprises a corrugated sheet material including a flat plate portion and a bending portion arranged on both sides of the flat plate portion. The corrugated sheets adjacent in the first direction are clamped together by the bending portion, and the bending portions of the two corrugated sheets are locked by a special locking machine to complete the connection. Since the length of the flat plate portion is greater than the length of the bending portion, the corrugated sheets adjacent in the second direction are plug-in connected by the flat plate portion, that is, the portion of the flat plate portion of a corrugated sheet material that exceeds the bending portion is inserted into an adjacent corrugated sheet material to achieve plug-in connection, and before the plug-in connection, sealant will be applied to the plug-in parts of the two corrugated sheets to ensure reliable sealing at the joints. This type of corrugated sheet material is easy to connect and assemble, and the quantity can be selected according to the on-site power generation needs, which is convenient and practical.

[0021] 5. The roof photovoltaic system provided by the utility model, the wiring device includes: a junction box and two wiring terminals. The flat plate is provided with a wire groove, and the two wiring terminals are electrically connected to the junction box, and the photovoltaic modules adjacent to each other along the first direction are electrically connected through the wiring terminals. The junction box is provided at the wire groove and is located on the side of the flat plate close to the base waterproof layer. The junction box is electrically connected to the photovoltaic laminate, and the cables can pass through the wire groove for easy connection. The top of the wire groove will also be covered by the photovoltaic laminate, and the waterproof performance of the corrugated sheet will not be affected by the groove in the flat plate.

[0022] 6. In the roof photovoltaic system provided by the utility model, the photovoltaic laminate is bonded to the flat plate portion of the profiled plate by colloid, which is convenient for connection and can be sealed and waterproof. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of a utility model roof photovoltaic system;

[0025] Figure 2 It is a schematic diagram of the utility model roof photovoltaic system installed on the roof;

[0026] Figure 3 It is a schematic diagram of the connection between two adjacent photovoltaic module units in the utility model roof photovoltaic system;

[0027] Figure 4 It is a schematic diagram of a single photovoltaic module unit in the utility model roof photovoltaic system;

[0028] Figure 5 It is a schematic diagram of the connection between the waterproof membrane and the photovoltaic module in the utility model roof photovoltaic system;

[0029] Figure 6 This is a front view of a single photovoltaic module in the utility model roof photovoltaic system;

[0030] Figure 7 It is a rear view of a single photovoltaic module in the utility model roof photovoltaic system;

[0031] Figure 8 It is a schematic diagram of the profiled sheet in the utility model roof photovoltaic system;

[0032] Fig. 9 It is a front view of the photovoltaic laminate in the utility model roof photovoltaic system;

[0033] Fig.10 It is a side view of the photovoltaic laminate in the utility model roof photovoltaic system.

[0034] Description of reference numerals:

[0035] 1. Roof;

[0036] 2. Basic waterproof layer;

[0037] 3. Photovoltaic module unit, 31. Photovoltaic module, 311. Profiled sheet, 3111. Flat plate, 3112. Bending portion, 3113. Wire trough, 312. Photovoltaic laminate, 3121. Encapsulation front plate, 3122. First adhesive film, 3123. Photovoltaic cell sheet, 3124. Second adhesive film, 3125. Encapsulation back plate, 313. Wiring device, 3131. Junction box, 3132. Wiring terminal;

[0038] 4. Waterproof membrane;

[0039] 5. Hanging tile strips;

[0040] 6. Bracket. DETAILED DESCRIPTION

[0041] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0042] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0045] like Figure 1 , Figure 2 As shown, it is a preferred embodiment of the roof 1 photovoltaic system of the utility model. This roof 1 photovoltaic system is suitable for being arranged on a roof 1, especially a roof 1 with a slope, so that the roof 1 has good waterproof performance and will not leak, and can protect the cables, joints, etc. in the system to prevent them from being damaged by rain or causing electricity safety accidents.

[0046] The above-mentioned roof 1 photovoltaic system includes: a basic waterproof layer 2 arranged on the roof 1 and a plurality of photovoltaic module units 3 arranged adjacent to the basic waterproof layer 2 along a first direction, and a basic waterproof layer 2 is added between the photovoltaic module units 3 and the roof 1 to improve the waterproof performance of the roof 1. The basic waterproof layer 2 can be made of a waterproof coating, a waterproof material layer, etc. The waterproof coating can be directly coated on the roof 1, and the waterproof material layer can be connected to the roof 1 by bonding or by fasteners such as expansion bolts. Each photovoltaic module unit 3 includes a plurality of photovoltaic modules 31 connected in sequence along a second direction, wherein the first direction is parallel to the width direction of the photovoltaic module 31, and the second direction is parallel to the length direction of the photovoltaic module 31, that is, the first direction is perpendicular to the second direction (the first direction and the second direction are as shown in FIG. 1 ). Figure 1 As shown by the arrows in the middle, the horizontal arrow indicates the first direction, and the vertical arrow indicates the second direction). Multiple photovoltaic modules 31 are arranged along the first direction and the second direction to form a power generation system with a large power generation area for photovoltaic power generation. Specifically, as Figure 1 As shown, in this embodiment, ten groups of photovoltaic component units 3 are provided, and each group of photovoltaic component units 3 includes two photovoltaic components 31 .

[0047] Of course, in other embodiments, the number of photovoltaic component units 3 can be three groups, five groups, eight groups, twelve groups, etc., and the number of photovoltaic components 31 in each group of photovoltaic component units 3 can also be three, five, etc., which can be adaptively adjusted according to the area of ​​the roof 1 and the power generation demand.

[0048] Further, such as Figure 6 , Figure 7 As shown, the photovoltaic assembly 31 includes: a corrugated sheet 311, a photovoltaic laminate 312 and a wiring device 313. The corrugated sheet 311 is arranged on the base waterproof layer 2, and the photovoltaic laminate 312 is arranged on the side of the corrugated sheet 311 away from the base waterproof layer 2, so that the photovoltaic laminate 312 can directly receive solar radiation to generate electricity. The wiring device 313 is arranged on the side of the corrugated sheet 311 close to the base waterproof layer 2 and is electrically connected to the photovoltaic laminate 312, so that the wiring device 313 can be protected by the corrugated sheet 311 to prevent it from being exposed and contacting rainwater. And the wiring devices 313 of the photovoltaic assemblies 31 adjacent to each other along the first direction are electrically connected, so that the electricity generated by multiple photovoltaic assembly units 3 can be collected.

[0049] Further, such as Figure 8 As shown, the corrugated sheet 311 includes: a flat plate portion 3111 and bent portions 3112 disposed on both sides of the flat plate portion 3111, the bending directions of the two bent portions 3112 are both toward the same side, and the length of the flat plate portion 3111 is greater than the length of the bent portions 3112. The corrugated sheets 311 adjacent to each other along the first direction are connected by snapping the bent portions 3112, that is, the connection between adjacent photovoltaic module units 3 is achieved by snapping the bent portion 3112 of one of the two adjacent corrugated sheets 311 on the bent portion 3112 of the other, so that it can be ensured that the connection will not leak.

[0050] like Figure 4 As shown, the corrugated sheets 311 adjacent to each other in the second direction are plug-connected by the flat portion 3111, that is, the photovoltaic modules 31 in the same photovoltaic module unit 3 are plug-connected. Since the length of the flat portion 3111 is greater than the length of the bending portion 3112, the flat portion 3111 of one of the corrugated sheets 311 adjacent to each other in the second direction can be directly inserted into the other corrugated sheet 311 to achieve connection. Before the plug-in connection, sealant is applied to the plug-in parts of the two corrugated sheets 311 to ensure reliable sealing at the joints. And a waterproof membrane 4 is provided at the connection between two photovoltaic modules 31 adjacent to each other in the second direction. Specifically, as shown in FIG. Figure 5 As shown, the waterproof roll 4 is arranged between the two profiled plates 311, and the sealing and waterproof performance of the connection is improved by the waterproof roll 4. In this embodiment, two pieces of waterproof roll 4 are arranged at the two bending parts 3112, respectively, and the waterproof roll 4 is preferably a self-adhesive TPO (thermoplastic polyolefin) waterproof roll 4. Of course, in other embodiments, it can also be arranged as a whole piece of waterproof roll 4.

[0051] like Figure 1 , Figure 3As shown, the connection positions of the photovoltaic components 31 adjacent to each other in the second direction in the adjacent photovoltaic component units 3 are staggered, that is, the connection positions of the photovoltaic components 31 in the adjacent photovoltaic component units are not located on the same horizontal line. Figure 3 It can be seen that the connection position of the photovoltaic component 31 in the left optical component unit is lower than the connection position of the photovoltaic component 31 in the right optical component unit. Figure 1 It can be seen that the connection positions of the photovoltaic components 31 in the multiple optical component units are arranged in a cyclical pattern of "low, high, low, high".

[0052] In addition, a wire groove 3113 is provided on the flat plate, so that the cable connecting the wiring device 313 and the photovoltaic laminate 312 can pass through the wire groove 3113. In this embodiment, the wire groove 3113 is a square groove provided in the middle of the flat plate portion 3111. Of course, in other embodiments, the wire groove 3113 can also be provided in other positions, such as the upper or lower part of the flat plate portion 3111, and the shape of the wire groove 3113 can also be a round groove, etc.

[0053] A plurality of fixing members are also arranged at intervals along the second direction on the base waterproof layer 2 for installing the profiled sheet 311. Specifically, in this embodiment, the fixing members are preferably tile hanging strips 5.

[0054] Furthermore, the fixing part, i.e. the tile hanging bar 5, is provided with a bracket 6, and the bracket 6 is installed on the tile hanging bar 5 by self-tapping screws. The corrugated sheet 311 is connected to the bracket 6. The specific connection method is that the corrugated sheet 311 and the bracket 6 are deformed by a special edge locking machine so that the corrugated sheet 311 is tightly engaged with the bracket 6. Specifically, the two bending parts 3112 on both sides of the photovoltaic system are connected to the bracket 6 separately, that is, Figure 1 The left side bending portion 3112 of the leftmost photovoltaic module unit 3 is connected to the bracket 6 alone, and the right side bending portion 3112 of the rightmost photovoltaic module unit 3 is connected to the bracket 6 alone, and the bending portion 3112 of the single corrugated sheet 311 is locked and connected to the bracket 6. The remaining positions are the connection points of two photovoltaic module units 3, so the two bending portions 3112 of the two corrugated sheets 311 are connected to the bracket 6, one of the bending portions 3112 is located at the lower side of the bracket 6, and the other bending portion 3112 is located at the upper side of the bracket 6, and the bending portions 3112 of the two corrugated sheets 311 are locked and connected to the bracket 6 together.

[0055] like Fig. 9As shown, the photovoltaic laminate 312 is the main component of photovoltaic power generation. The length and width of the photovoltaic laminate 312 are smaller than the flat plate portion 3111 of the profiled sheet 311. When the photovoltaic laminate 312 is set, it is directly bonded to the flat plate portion 3111. The bonding connection method can not only fix the photovoltaic laminate 312, but also seal and waterproof. Specifically, the structural adhesive is evenly applied on the profiled sheet 311. When applying the adhesive, the adhesive is evenly applied along the wire groove 3113 of the profiled sheet 311, the center line of the profiled sheet 311 and the outer edge of the photovoltaic laminate 312, and then the photovoltaic laminate 312 is set. After the colloid is solidified, the photovoltaic laminate 312 and the profiled sheet 311 can be firmly bonded together.

[0056] Specifically, Fig.10 As shown, the photovoltaic laminate 312 includes: a packaging front plate 3121, a first adhesive film 3122, a photovoltaic cell 3123, a second adhesive film 3124 and a packaging back plate 3125 arranged in sequence, and the packaging front plate 3121, the first adhesive film 3122, the photovoltaic cell 3123, the second adhesive film 3124 and the packaging back plate 3125 are formed by lamination, wherein the packaging back plate 3125 is bonded to the flat plate portion 3111.

[0057] Furthermore, the wiring device 313 includes: a wiring box 3131 and two wiring terminals 3132, wherein the wiring box 3131 is arranged at the wire groove 3113 of the corrugated sheet 311 and is located on the side of the flat plate portion 3111 close to the base waterproof layer 2. The wiring box 3131 is electrically connected to the photovoltaic laminate 312, and the two wiring terminals 3132 are electrically connected to the wiring box 3131 and extend to both sides of the corrugated sheet 311, respectively, so as to facilitate the electrical connection of the photovoltaic modules 31 adjacent to each other in the first direction through the wiring terminals 3132.

[0058] The following is a description of the use process of the roof 1 photovoltaic system provided in this embodiment:

[0059] First, the photovoltaic module 31 can be constructed. The photovoltaic module 31 is set in the following steps: applying glue on the profiled sheet 311, and then setting the photovoltaic laminate 312 on the profiled sheet 311 and fixing it by curing the glue. When setting the photovoltaic laminate 312, one end of the photovoltaic laminate 312 is aligned with the profiled sheet 311, and a sealant is set in the blank area of ​​the other end.

[0060] Then, a basic waterproof layer 2 is set on the roof 1. After the basic waterproof layer 2 is set, a tile hanging strip 5 is set along the second direction, and the tile hanging strip 5 is connected to the basic waterproof layer 2. Then, a bracket 6 is set on the tile hanging strip 5, and then the photovoltaic module units 3 are sequentially set along the first direction. In each photovoltaic module unit 3, the photovoltaic modules 31 are sequentially connected in the second direction, and the waterproof membrane 4 is applied with glue at the connection. The bending parts between adjacent photovoltaic module units 3 are connected together with the bracket 6. Finally, the wiring terminals 3132 corresponding to each row are connected together, and photovoltaic power generation can be carried out.

[0061] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.

Claims

1. A roof photovoltaic system, characterized in that: include: A base waterproof layer (2) arranged on a roof (1) and a plurality of photovoltaic module units (3) arranged adjacent to the base waterproof layer (2) along a first direction, each of the photovoltaic module units (3) comprising a plurality of photovoltaic modules (31) connected in sequence along a second direction, the first direction being parallel to a width direction of the photovoltaic module (31), and the second direction being parallel to a length direction of the photovoltaic module (31); The photovoltaic module (31) comprises: a corrugated sheet (311), a photovoltaic laminate (312) and a wiring device (313); the corrugated sheet (311) is arranged on the base waterproof layer (2); the photovoltaic laminate (312) is arranged on a side of the corrugated sheet (311) away from the base waterproof layer (2); the wiring device (313) is arranged on a side of the corrugated sheet (311) close to the base waterproof layer (2) and is electrically connected to the photovoltaic laminate (312), and is electrically connected to the wiring device (313) of the photovoltaic module (31) adjacent to the first direction.

2. The roof photovoltaic system according to claim 1, characterized in that: A waterproof roll material (4) is provided at the connection between two adjacent photovoltaic modules (31) along the second direction.

3. The roof photovoltaic system according to claim 2, characterized in that: The connection positions of the photovoltaic components (31) adjacent to each other along the second direction in adjacent photovoltaic component units (3) are arranged in a staggered manner.

4. The roof photovoltaic system according to claim 2, characterized in that: It also comprises fixing members which are arranged on the base waterproof layer (2) at intervals along the second direction, and the corrugated sheet material (311) is connected to the fixing members.

5. The roof photovoltaic system according to claim 4, characterized in that: The fixing piece is a tile hanging strip (5).

6. The roof photovoltaic system according to claim 4, characterized in that: A bracket (6) is provided on the fixing member, and the profiled plate (311) is connected to the bracket (6).

7. The roof photovoltaic system according to claim 1, characterized in that: The corrugated sheet material (311) comprises: a flat plate portion (3111) and bending portions (3112) arranged on both sides of the flat plate portion (3111), and the length of the flat plate portion (3111) is greater than the length of the bending portion (3112), the corrugated sheets (311) adjacent to each other along the first direction are clamped together by the bending portions (3112), and the corrugated sheets (311) adjacent to each other along the second direction are plug-connected together by the flat plate portion (3111).

8. The roof photovoltaic system according to claim 7, characterized in that: The wiring device (313) comprises: a wiring box (3131) and two wiring terminals (3132); the flat plate portion (3111) is provided with a wire groove (3113); the wiring box (3131) is arranged at the wire groove (3113) and is located on a side of the flat plate portion (3111) close to the base waterproof layer (2); the wiring box (3131) is electrically connected to the photovoltaic laminate (312); the two wiring terminals (3132) are electrically connected to the wiring box (3131); and the photovoltaic modules (31) adjacent to each other along the first direction are electrically connected via the wiring terminals (3132).

9. The roof photovoltaic system according to claim 7, characterized in that: The photovoltaic laminate (312) is bonded to the flat plate portion (3111).

10. The roof photovoltaic system according to claim 9, characterized in that: The photovoltaic laminate (312) comprises: a packaging front plate (3121), a first adhesive film (3122), a photovoltaic cell sheet (3123), a second adhesive film (3124) and a packaging back plate (3125) which are arranged in sequence, and the packaging back plate (3125) is bonded to the flat plate portion (3111).

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