Light reflection device, photovoltaic support and photovoltaic system

Abstract

The embodiment of the utility model provides a light reflection device, a photovoltaic support and a photovoltaic system, and belongs to the technical field of photovoltaic cells. The light reflecting device is applied to a mounting bracket of a photovoltaic module so as to reflect light rays to the back surface of the photovoltaic module; the light reflecting device comprises at least two supporting plates, every two adjacent supporting plates are connected with each other and form an inclination angle, and the outer side face of at least one supporting plate is a reflecting face. According to the technology provided by the embodiment of the invention, the irradiation of the back of the photovoltaic module can be improved, the problem of non-uniform irradiation distribution of the back of the double-sided photovoltaic module is improved, and the power generation efficiency of the photovoltaic module is improved.

Description

Technical Field

[0001] This application relates to the field of photovoltaic bracket technology, and in particular to a light reflector, a photovoltaic bracket, and a photovoltaic system. Background Technology

[0002] Bifacial photovoltaic (PV) modules can receive irradiance from both sides, increasing power output and thus gaining widespread adoption. PV tracking brackets can adjust the angle of bifacial PV modules to improve the power generation efficiency of the PV system. However, while PV tracking brackets can increase the irradiance received by both the front and back of bifacial PV modules, their supporting shafts can easily cause irradiance blockage on the back of the PV modules, resulting in uneven irradiance distribution and limiting further power generation improvements from bifacial PV modules.

[0003] It should be noted that the above content is not necessarily prior art, nor is it intended to limit the scope of patent protection of this application. Summary of the Invention

[0004] This application provides a light-reflecting device, a photovoltaic bracket, and a photovoltaic system to solve or alleviate one or more of the technical problems mentioned above.

[0005] As a first aspect of the present application, the present application provides a light reflecting device applied in the mounting bracket of a photovoltaic module to reflect light to the back of the photovoltaic module; the light reflecting device includes at least two support plates, two adjacent support plates are connected to each other and have an angle, and the outer surface of at least one support plate is a reflective surface.

[0006] In one embodiment, the angle between the reflective surface and at least one adjacent support plate is greater than 100° and less than 160°.

[0007] In one embodiment, the reflective surface is made by coating with a high-reflectivity coating or depositing a metal film layer.

[0008] In one embodiment, the reflective mask has multiple arched ridges, the extension direction of which forms an angle of 170° to 190° with the extension direction of the connecting line that is fixedly connected to at least two support plates at an angle.

[0009] In one embodiment, the arch is a circular arc arch with a radial length of D and a reflective surface with a length of L along the direction perpendicular to the connecting line; the number of solar cells arranged in the photovoltaic module along the direction perpendicular to the connecting line is S; and the ratio of D to L is adapted to S.

[0010] In one embodiment, the distance between two adjacent arches is M, where 0 ≤ M ≤ D.

[0011] As a second aspect of the embodiments of this application, this application provides a photovoltaic support bracket, including:

[0012] The support component includes a column and a main shaft. The column is fixed to the ground, and the main shaft is connected to the end of the column that is away from the ground.

[0013] Support components are mounted on the main shaft to support photovoltaic modules; the photovoltaic modules are positioned close to the main shaft.

[0014] In any of the above embodiments, the light reflecting device is disposed on the upper surface of the main shaft, and the height of the light reflecting device is adapted to the height of the photovoltaic module so that the light reflecting device reflects light to the back of the photovoltaic module.

[0015] In one embodiment, the number of photovoltaic modules is two sets, which are respectively arranged on opposite sides of the main shaft, and the gap between the two sets of photovoltaic modules is 4 / 5-6 / 5 of the width of the main shaft.

[0016] In one embodiment, the width of the light-reflecting device is smaller than the gap between the two sets of photovoltaic modules, and the width of the light-reflecting device is 5-10cm.

[0017] In one embodiment, the support includes slats that clamp the opposite sides of the photovoltaic module, the slats extending perpendicular to the main axis, and a light-reflecting device fixed between the two slats and fixed to the slats.

[0018] As a third aspect of the embodiments of this application, the embodiments of this application provide a photovoltaic system, including a photovoltaic module and a photovoltaic support in any of the above embodiments; the photovoltaic module is a bifacial photovoltaic module.

[0019] The embodiments of this application employing the above-described technical solution may have the following advantages:

[0020] The light-reflecting device provided in this application embodiment allows light to be irradiated into the inclined reflective surface. In the reflective surface, the portion of the reflective surface is lower than the back of the photovoltaic module. The light reflected by the reflective surface can be spread out on the back of the photovoltaic module, thereby improving the light absorption on the back of the photovoltaic module. Attached Figure Description

[0021] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0022] Figure 1 This diagram illustrates an application scenario of the light reflection device provided in the embodiments of this application.

[0023] Figure 2This diagram illustrates the irradiance distribution of a photovoltaic module in an application scenario where the light-reflecting device provided in this embodiment of the application is used.

[0024] Figure 3 A schematic diagram of the structure of the light reflection device provided in the embodiment of this application is shown.

[0025] Figure 4 A schematic diagram of the cross-sectional structure of the light reflecting device provided in an embodiment of this application is shown.

[0026] Figure 5 This paper shows a schematic diagram of the structure of a photovoltaic support provided in an embodiment of this application.

[0027] Figure 6 This diagram illustrates the reflected light from a photovoltaic bracket provided in an embodiment of this application. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. The application will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0030] In this application, when numerical intervals (i.e., numerical ranges) are involved, unless otherwise specified, the distribution of selectable numerical values ​​within the numerical interval is considered continuous, and includes the two endpoints of the numerical interval (i.e., the minimum and maximum values), as well as every numerical value between these two endpoints. Unless otherwise specified, when a numerical interval refers only to integers within that numerical interval, it includes the two endpoint integers of the numerical range, as well as every integer between the two endpoints, which is equivalent to directly listing every integer. When multiple numerical ranges are provided to describe features or characteristics, these numerical ranges can be merged. In other words, unless otherwise specified, the numerical ranges disclosed in this application should be understood to include any and all subranges included therein. The "numerical value" in the numerical interval can be any quantitative value, such as a number, percentage, ratio, etc. The term "numerical interval" can be broadly included to include percentage intervals, ratio intervals, proportion intervals, etc.

[0031] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. It should be understood that these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein.

[0032] This application provides a light reflector 400, which is applied in the application scenario of photovoltaic module 300. Figure 1 This diagram illustrates an application scenario of the light reflection device 400 provided in an embodiment of this application. Figure 2 This diagram illustrates the irradiance distribution of a photovoltaic module 300 in an application scenario of the light-reflecting device 400 provided in this embodiment of the application. Figure 1 and Figure 2 As shown, the photovoltaic support structure includes a main shaft 120, on which photovoltaic modules 300 are mounted. Photovoltaic modules 300 are installed on both opposite sides of the main shaft 120. Since the photovoltaic modules 300 are bifacial, meaning both their front and back sides can absorb light energy to generate electricity, the more light absorbed, the more electricity generated, and the higher the power generation efficiency. And as... Figure 2 As shown, on the back of the photovoltaic module 300, due to the shading of the main shaft 120, the solar cells near the main shaft 120 absorb less irradiance and generate less power. Due to the series connection between the solar cells, similar to the barrel effect, the output power of the module is equal to the power of the smallest solar cell. Therefore, the shading of the main shaft 120 has a significant impact on the power generation of the photovoltaic module 300.

[0033] This application provides a light reflector 400 to solve the problem of the main shaft 120 being blocked, thereby improving the power generation efficiency of the photovoltaic module 300.

[0034] This application provides a light reflecting device 400, such as... Figures 3 to 6As shown, the light reflecting device 400 includes at least two support plates 410, two adjacent support plates 410 are connected to each other and have an angle, and the outer surface of at least one support plate 410 is a reflective surface.

[0035] Two adjacent support plates 410 are fixedly connected and form an angle to form a stable structure, so as to facilitate the tilting of the outer side of the light reflector 400.

[0036] The fixed connection between the support plates 410 can also be a rotatable connection, such as a hinge, to adjust the angle between two adjacent support plates 410.

[0037] In one example, there are two support plates 410 connected at an angle to form a triangle without a bottom edge. The outer surface of the support plate 410 is a reflective surface, which can also be understood as the side facing away from the other support plate 410. The outer surface of the support plate 410 is a reflective surface to facilitate the reception and reflection of light.

[0038] In one example, there are three support plates 410, forming a triangular shape. When the light reflector 400 is mounted on a photovoltaic bracket, the bottom edge can be a support plate 410 without a reflective surface.

[0039] The light-reflecting device 400 provided in this application embodiment allows light to be irradiated onto the inclined reflective surface. The portion of the reflective surface located below the back of the photovoltaic module 300 allows the light reflected from the reflective surface to spread out on the back of the photovoltaic module 300, thereby improving the light absorption on the back of the photovoltaic module 300.

[0040] The light reflecting device 400 provided in this application embodiment can be fixed in the photovoltaic bracket on which the photovoltaic module 300 is installed, or it can be fixed in the photovoltaic module 300, so that the light reflecting device 400 is located near the side of the photovoltaic module 300 and is set below the back of the photovoltaic module 300, thereby reflecting light to the back of the photovoltaic module 300.

[0041] The light-reflecting device 400 provided in this application embodiment can improve the irradiance on the back of the photovoltaic module 300, improve the problem of uneven irradiance distribution on the back of the bifacial photovoltaic module 300, and thus improve the power generation efficiency of the photovoltaic module 300.

[0042] In one embodiment, the angle between the reflective surface and at least one adjacent support plate 410 is greater than 100° and less than 160°.

[0043] The greater the angle at which the reflecting surface is tilted towards the bottom edge, that is, the smaller the angle between it and the bottom edge, the farther the reflected light will travel, based on the principle of light reflection.

[0044] To ensure that the light reflected by the reflective surface can be reflected to the outermost solar cell in the photovoltaic module 300 that is away from the main axis 120, the angle between the reflective surface and at least one adjacent support plate 410 is limited to be greater than 100° and less than 160°.

[0045] In one example, the light-reflecting device 400 includes two reflective surfaces forming a triangle. To ensure that the angle between each reflective surface and at least one adjacent support plate 410 is greater than 100° and less than 160°, the included angle between the two reflective surfaces can be greater than 100° and less than 160°. The two reflective surfaces reflect light towards the photovoltaic modules 300 on both sides of the main shaft 120.

[0046] The angle between the reflective surface and at least one adjacent support plate 410 can be 100°, 130°, or 160°. By defining the angle between the reflective surface and at least one adjacent support plate 410, it can be ensured that the light reflected by the reflective surface is reflected to the outermost solar cell in the photovoltaic module 300 that is away from the main axis 120.

[0047] In one embodiment, the reflective surface is made by coating with a high-reflectivity coating or depositing a metal film layer.

[0048] The reflective surface can be made of a material with high reflectivity and resistance to oxidation, so as to improve its service life and achieve high reflectivity.

[0049] In one example, the reflective surface can be polished stainless steel.

[0050] In one embodiment, the reflective surface has multiple arched ridges 411, the extension direction of which is at an angle of 170° to 190° to the extension direction of the connecting line that is fixedly connected to at least two support plates 410 at an angle.

[0051] like Figure 4 and Figure 6 As shown, the reflective surface, arranged with arches 411, allows for adjustment of the reflection path at different positions on the reflective surface, thereby adjusting the reflection path to ensure that more reflected light illuminates the target solar cell. Furthermore, the different curvatures of the multiple arches 411 can be adjusted to ensure that more reflected light illuminates the solar cell near the main axis 120.

[0052] In this embodiment, the arch 411 can be used to adjust the reflection path, so that the reflected light can be evenly adjusted to illuminate the back of the photovoltaic module 300. Based on the barrel principle, the power generation efficiency of the photovoltaic module 300 can be further improved.

[0053] The extension direction of the arch 411 is at an angle of 170° to 190° to the extension direction of the connecting line that is fixedly connected to at least two support plates 410 at an angle. That is, the extension direction of the arch 411 is parallel or approximately parallel to the extension direction of the connecting line that is fixedly connected to at least two support plates 410 at an angle. This verifies that the reflected light after the same arch 411 is reflected onto the same column in the cell array, further ensuring uniform illumination on the back of the photovoltaic module 300.

[0054] In one embodiment, the arch 411 is an arc-shaped arch 411 with a radial length of D and a reflective surface length of L along the direction perpendicular to the connecting line; the number of solar cells arranged in the photovoltaic module 300 along the direction perpendicular to the connecting line is S; the ratio of D to L is adapted to S.

[0055] In one example, the ratio of D to L could be equal to 1 / S, or equal to 1 / (S+1), or equal to 1 / (S+2), and so on. The reciprocal of the number of arches 411 can be determined based on the ratio of D to L, that is, the number of arches 411 can be determined by dividing L by D.

[0056] In one embodiment, the distance between two adjacent arch strips 411 is M, where 0 ≤ M ≤ D.

[0057] If the distance between two adjacent arches 411 is 0, then L divided by D is the number of arches 411. If the distance between two adjacent arches 411 is too large, the required size of the reflective surface will be larger, and it will be inconvenient for light to be reflected near the bottom edge of the reflective surface.

[0058] This application also provides a photovoltaic support structure, such as... Figures 5 to 6 As shown, the photovoltaic bracket includes a support member, a support member 200, and a light-reflecting device 400 in any of the above embodiments.

[0059] The support structure includes a column 110 and a main shaft 120. The column 110 is fixed to the ground, and the main shaft 120 is connected to the end of the column 110 that is away from the ground. During the installation of the photovoltaic module 300, the photovoltaic module 300 needs to be fixed in place using the column 110 and the main shaft 120. The column 110 and the main shaft 120 are pre-fixed to the ground, and then the photovoltaic module 300 is mounted on the main shaft 120.

[0060] The support member 200 is mounted on the main shaft 120 to support the photovoltaic module 300; the photovoltaic module 300 is positioned close to the main shaft 120. The support member 200 is used to support the photovoltaic module 300 by clamping or gluing, and then the support member 200 is connected to the main shaft 120 of the support member to fix the photovoltaic module 300.

[0061] A light reflector 400 is disposed on the upper surface of the main shaft 120. The height of the light reflector 400 is adapted to the height of the photovoltaic module 300 so that the light reflector 400 reflects light to the back of the photovoltaic module 300.

[0062] To avoid obstructing the light absorption of the photovoltaic module 300, the main shaft 120 is typically positioned below the photovoltaic module 300 and is not blocked by it. The light reflecting device 400 is positioned on the upper surface of the main shaft 120, allowing the light reflecting device 400 to be positioned on the western side of the back of the photovoltaic module 300, thereby reflecting light to the back of the photovoltaic module 300.

[0063] In practical implementation, the height between the main shaft 120 and the photovoltaic module 300 can be adjusted based on the requirements of the light reflector 400 to ensure that the light reflected by the light reflector 400 can illuminate the outermost cell of the photovoltaic module 300 that is away from the main shaft 120.

[0064] In one example, based on the back-side light irradiance distribution of the photovoltaic module 300, the solar cells facing away from the main axis 120 receive greater irradiance than those facing away from the main axis 120. The light reflected by the light-reflecting device 400 can also illuminate the solar cells near the main axis 120 in the photovoltaic module 300, making the light irradiance of the solar cells near the main axis 120 level with that of the solar cells facing away from the main axis 120, thereby improving the power generation efficiency of the back side of the photovoltaic module 300.

[0065] In one embodiment, there are two sets of photovoltaic modules 300, which are respectively arranged on opposite sides of the main shaft 120, and the gap between the two sets of photovoltaic modules 300 is 4 / 5 to 6 / 5 of the width of the main shaft 120.

[0066] The gap between the two sets of photovoltaic modules 300 is adapted to the width of the main shaft 120 to avoid the main shaft 120 blocking the cells on the back of the photovoltaic module 300.

[0067] The gap between the two sets of photovoltaic modules 300 can be 4 / 5-1 of the width of the main axis 120 because the photovoltaic module 300 includes an aluminum frame, and blocking part of the aluminum frame will not affect the light absorption of the solar cells.

[0068] The gap between the two sets of photovoltaic modules 300 cannot be too large, therefore it is limited to within 6 / 5 of the width of the main shaft 120 to avoid increasing the load on the main shaft 120 and to avoid increasing the space occupied by the photovoltaic lettering. In one embodiment, the width of the light reflector 400 is smaller than the gap between the two sets of photovoltaic modules 300, so that the reflective surface of the light reflector 400 can receive light from the front of the photovoltaic module 300 from all directions and reflect it to the back of the photovoltaic module 300. The width of the light reflector 400 is 5-10cm, for example, 5cm, 7cm or 10cm. The width of the light reflector 400 can be the maximum distance between two adjacent reflective surfaces. In one embodiment, the support member 200 includes purlins 210 clamping opposite sides of the photovoltaic module 300. The extension direction of the purlins 210 is perpendicular to the main shaft 120. The light reflector 400 is fixed between the two purlins 210 and fixed on the purlins 210.

[0069] like Figure 3 As shown, the light reflector 400 may have opposing lugs 420 for threaded fixation between two purlins 210. The light reflector 400 is fixed to the purlins 210, rather than to the main shaft 120, ensuring that the light distribution reflected by the light reflector 400 to the back of the photovoltaic module 300 remains unaffected regardless of whether the main shaft 120 drives the photovoltaic module 300 to rotate or the photovoltaic module 300 rotates relative to the main shaft 120.

[0070] This application also provides a photovoltaic system, including a photovoltaic module 300 and a photovoltaic module in any of the above embodiments; the photovoltaic module 300 is a bifacial photovoltaic module 300.

[0071] The photovoltaic system provided in this application embodiment can have higher power generation efficiency based on the function of the light reflector 400.

[0072] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0073] For ease of description, directional terms such as "front, back, up, down, left, right," "horizontal, vertical, horizontal," and "top, bottom" generally indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are used solely for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner or outer contours relative to the components themselves. For example, if a device in the drawings is inverted, a device described as "above" or "on top of" other devices or structures will subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0074] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0075] Unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0076] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0077] It should also be noted that the terms "one embodiment," "another embodiment," or "embodiment" used in this specification refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this application.

[0078] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0079] It should also be noted that the above are merely preferred embodiments of this application and do not limit the scope of patent protection of this application. Any equivalent structural or procedural changes made using the content of this application’s specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this application.

Claims

1. A light-reflecting device, characterized in that, The light reflector is used in the mounting bracket of a photovoltaic module to reflect light to the back of the photovoltaic module; the light reflector includes at least two support plates, two adjacent support plates are connected to each other and have an angle, and the outer surface of at least one support plate is a reflective surface.

2. The light reflecting device according to claim 1, characterized in that, The angle between the reflective surface and at least one adjacent support plate is greater than 100° and less than 160°.

3. The light-reflecting device according to any one of claims 1 to 2, characterized in that, The reflective surface has multiple arched ridges, and the extension direction of the ridges forms an angle of 170° to 190° with the extension direction of the connecting line that is fixedly connected to at least two of the support plates at an angle.

4. The light reflecting device according to claim 3, characterized in that, The arch is a circular arc arch with a radial length of D. The length of the reflective surface along the direction perpendicular to the connecting line is L. The number of solar cells arranged in the photovoltaic module along the direction perpendicular to the connecting line is S. The ratio of D to L is adapted to S.

5. The light-reflecting device according to claim 4, characterized in that, The spacing between the multiple arches is M, where 0 ≤ M ≤ D.

6. A photovoltaic support structure, characterized in that, include: A support member, comprising a column and a main shaft, wherein the column is fixed to the ground and the main shaft is connected to the end of the column facing away from the ground; A support member is mounted on the main shaft to support the photovoltaic module; the photovoltaic module is positioned close to the main shaft. The light reflecting device according to any one of claims 1 to 5, wherein the light reflecting device is disposed on the upper surface of the main shaft, and the height of the light reflecting device is adapted to the height of the photovoltaic module, so that the light reflecting device reflects light to the back of the photovoltaic module.

7. The photovoltaic support according to claim 6, characterized in that, The photovoltaic modules are arranged in two sets, with the two sets of photovoltaic modules respectively located on opposite sides of the main shaft, and the gap between the two sets of photovoltaic modules being 4 / 5 to 6 / 5 of the width of the main shaft.

8. The photovoltaic support according to claim 7, characterized in that, The width of the light-reflecting device is smaller than the gap between the two sets of photovoltaic modules; the width of the light-reflecting device is 5-10cm.

9. The photovoltaic bracket according to claim 6, characterized in that, The support includes slats that clamp the photovoltaic module on opposite sides. The slats extend perpendicularly to the main axis. The light-reflecting device is fixed between the two slats and fixed to the slats.

10. A photovoltaic system, characterized in that, It includes a photovoltaic module and a photovoltaic support as described in any one of claims 6 to 9; the photovoltaic module is a bifacial photovoltaic module.

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