Photovoltaic system

Abstract

The application discloses a photovoltaic system and relates to the technical field of photovoltaic systems. The photovoltaic system comprises a plurality of first beams extending along a first direction and a plurality of second beams extending along a second direction, the first direction forms an angle with a horizontal plane, the plurality of first beams are distributed along the second direction at intervals, and the second beams are connected to the first beams. The photovoltaic system further comprises at least one row of first photovoltaic components arranged along the second direction; in the second direction, the side edges of two adjacent first photovoltaic components are fixed, and the side edges of the at least one row of first photovoltaic components are provided with overhanging portions; the overhanging portions, the first beams and the second beams are all arranged at intervals. The photovoltaic system further comprises a support beam, one end of the support beam is fixed with the overhanging portions, and the other end of the support beam is fixed with the first beams or the second beams. The technical scheme provided by the application aims to improve the overhanging condition of the side edges of the photovoltaic components and guarantee the reliability and stability of the photovoltaic system.

Description

Technical Field

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

[0002] In related technologies, when the side of a photovoltaic module is located between the two beams of the main water tank, the side will be cantilevered relative to the main water tank. Especially for photovoltaic modules located on the side in a row, the excessively long cantilevered outer side can easily lead to microcracks and damage to the photovoltaic module, seriously affecting the reliability and stability of the photovoltaic system. Utility Model Content

[0003] The main purpose of this application is to propose a photovoltaic system that aims to improve the side cantilever situation of photovoltaic modules and ensure the reliability and stability of the photovoltaic system.

[0004] To achieve the above objectives, the photovoltaic system proposed in this application includes:

[0005] Multiple first beams extending along a first direction and multiple second beams extending along a second direction, the first direction forming an angle with the horizontal plane, the multiple first beams being spaced apart along the second direction, and the second beams being connected to each of the first beams;

[0006] At least one row of first photovoltaic modules arranged along the second direction; in the second direction, the sides of two adjacent first photovoltaic modules are fixed together, and at least one row of first photovoltaic modules has a cantilevered portion formed on its side; the cantilevered portion and the first beam and the second beam are all spaced apart;

[0007] The supporting beam is fixed at one point to the cantilevered portion and at the other point to the first beam or the second beam.

[0008] In one embodiment, the support beam extends along the second direction and is fixed at both ends to the cantilever portion and the first beam body, respectively.

[0009] In one embodiment, the support beam is also fixed to another first beam body between its two ends.

[0010] In one embodiment, the support beam is provided with a limiting groove, and the cantilever portion includes a side frame that engages within the limiting groove.

[0011] In one embodiment, the side frame includes a main body and a protruding edge, the protruding edge protruding along the second direction on the side of the main body, the limiting groove includes a receiving groove and a slot connected together, the protruding edge is inserted into the slot, and the main body is received in the receiving groove.

[0012] In one embodiment, the support beam is equipped with a limiting clip, the limiting clip has a slot, and the cantilever part includes a side frame that engages with the slot.

[0013] In one embodiment, the card slot is opened along the second direction, and the limiting card includes a first sidewall, a second sidewall, and a third sidewall that form the card slot. The first sidewall and the opening of the card slot are opposite each other, and the second sidewall and the third sidewall are disposed opposite each other. The second sidewall and the third sidewall abut against the side frame on the light-facing side and the backlight side of the first photovoltaic module, respectively.

[0014] In one embodiment, the third sidewall is provided with a rib for abutting the bottom of the side frame.

[0015] In one embodiment, the first beam has a water guide groove, the mounting bracket is installed in the water guide groove, the support beam is fixed to the mounting bracket by a first fastener, and the support beam has a strip hole extending along the second direction for the first fastener to pass through.

[0016] In one embodiment, the bottom of the support beam is provided with a plurality of water passage holes arranged at intervals along its length.

[0017] In one embodiment, in the first direction, at least one side of the first photovoltaic module is provided with at least one row of second photovoltaic modules arranged along the second direction;

[0018] The first photovoltaic module and the second photovoltaic module are configured as rectangles of the same size, the first photovoltaic module is a horizontal module and the second photovoltaic module is a vertical module.

[0019] In the technical solution of this application, the cantilevered part located on the side of the first photovoltaic module can be indirectly connected to at least one of the first beam and the second beam through a support beam, thereby forming a force transmission path between the cantilevered part and the corresponding beam, so that the cantilevered part can be supported by the first beam or the second beam. This can improve the side cantilever situation of the first photovoltaic module, so as to ensure the structural stability of the first photovoltaic module and thus ensure the reliability and stability of the photovoltaic system. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a partial structural schematic diagram of an embodiment of the photovoltaic system provided in this application;

[0022] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0023] Figure 3 A schematic diagram of a structure of a photovoltaic system provided in this application when a sealing plate is provided at the notch;

[0024] Figure 4 This is a schematic diagram of a structure of an embodiment of the photovoltaic system provided in this application with the notch removed from the sealing plate.

[0025] Figure 5 for Figure 4 A magnified view of a section at point B in the middle;

[0026] Figure 6 for Figure 5 A schematic diagram of the local structure from another perspective;

[0027] Figure 7 A schematic diagram illustrating the fit between the support beam and the cantilever portion of the photovoltaic system provided in this application;

[0028] Figure 8 for Figure 7 A schematic diagram of the fit between the support beam and the side frame in one embodiment;

[0029] Figure 9 for Figure 7 A schematic diagram of the fitting structure of one embodiment of the support beam;

[0030] Figure 10 A schematic diagram illustrating the fit of the support beam, limiting clips, and cantilever portion of the photovoltaic system provided in this application;

[0031] Figure 11 for Figure 10 A structural diagram of the supporting beam and limiting clips in the middle;

[0032] Figure 12 for Figure 11 A structural schematic diagram of the next embodiment, viewed from the bottom of the supporting beam;

[0033] Figure 13 This is a structural schematic diagram of another embodiment of the support beam for the photovoltaic system provided in this application;

[0034] Figure 14 A schematic diagram of another embodiment of the support beam and limiting clip of the photovoltaic system provided in this application.

[0035] Explanation of icon numbers:

[0036] 100. First beam; 110. Water guide channel; 200. Second beam;

[0037] 331. Gap; 332. Sealing plate;

[0038] 400. First photovoltaic module; 401. Cantilever section; 410. Side frame; 411. Main body; 412. Protruding edge;

[0039] 500, Support beam; 510, Limiting groove; 511, Receiving groove; 512, Slot; 520, Strip hole; 530, Water passage hole; 540, Mounting plate;

[0040] 600, Limiting clip; 601, Slot; 610, First sidewall; 620, Second sidewall; 630, Third sidewall; 631, Rib;

[0041] 700, Mounting support; 810, First fastener; 820, Second fastener; 900, Second photovoltaic module.

[0042] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0043] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0044] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0045] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0046] This application proposes a photovoltaic system.

[0047] Please see Figure 1 and Figure 2 In one embodiment of this application, the photovoltaic system includes a plurality of first beams 100 extending along a first direction and a plurality of second beams 200 extending along a second direction. The first direction forms an angle with the horizontal plane. The plurality of first beams 100 are spaced apart along the second direction, and the second beams 200 are connected to each of the first beams 100. The photovoltaic system also includes at least one row of first photovoltaic modules 400 arranged along the second direction. In the second direction, at least one side of the at least one row of first photovoltaic modules 400 forms a cantilever portion 401. The cantilever portion 401 is spaced apart from both the first beams 100 and the second beams 200, that is, the cantilever portion 401 refers to a portion that cantilevers relative to the first beams 100 and the second beams 200. The photovoltaic system also includes a support beam 500, one part of which is fixed to the cantilever portion 401, and the other part is fixed to either the first beam 100 or the second beam 200.

[0048] It is understood that a row of first photovoltaic modules 400 consists of at least two first photovoltaic modules 400 arranged along the second direction. In the second direction, there is one first photovoltaic module 400 on each side of the row of first photovoltaic modules 400. The opposite sides of these two first photovoltaic modules 400 are the side positions of the row of first photovoltaic modules 400. The cantilever 401 is located at the side position of the row of first photovoltaic modules 400. If the cantilever length of the cantilever 401 relative to the first beam 100 and the second beam 200 is too large, the first photovoltaic modules 400 are at risk of developing microcracks under long-term effects of their own weight, wind suction, and wind pressure.

[0049] In the technical solution of this application, the cantilever portion 401 can be indirectly connected to at least one of the first beam 100 and the second beam 200 through the support beam 500, thereby forming a force transmission path between the cantilever portion 401 and the corresponding beam, so that the cantilever portion 401 can be supported by the first beam 100 or the second beam 200. This can improve the side cantilever situation of the first photovoltaic module 400, so as to ensure the structural stability of the first photovoltaic module 400, thereby ensuring the reliability and stability of the photovoltaic system.

[0050] It should be noted that the fixing method defined in this application can be either a non-detachable connection or a detachable connection, as long as the two fixing elements can achieve a reliable connection and a relatively fixed positional relationship.

[0051] In addition, in this application, the fixing of the support beam 500 and the cantilever 401, as well as the fixing of the support beam 500 and the corresponding beam, can be achieved by direct connection or indirect connection. Specifically, indirect connection refers to fixing other components on the support beam 500, and indirectly fixing and cooperating with the cantilever 401 or the corresponding beam through these components.

[0052] For a row of first photovoltaic modules 400, one side may be supported by a first beam 100, and the other side may have a cantilevered portion 401 that is cantilevered relative to the first beam 100 and the second beam 200. Alternatively, both sides may be cantilevered relative to the first beam 100 and the second beam 200, and both sides may be fixed as cantilevered portions 401 to different support beams 500. Or, one side may be fixed as a cantilevered portion 401 to a support beam 500, and the cantilever situation of the other side may be improved by supporting columns or other means.

[0053] Furthermore, in this application, in the second direction, the adjacent sides of every two adjacent first photovoltaic modules 400 are fixed, thereby forming a rigid connection, so that the first photovoltaic modules 400 in the same row are connected as a whole, which is beneficial to improving the structural stability of the first photovoltaic modules 400. Specifically, two pressure blocks can be connected by fasteners, and the two pressure blocks simultaneously press the two adjacent first photovoltaic modules 400 on the light-facing side and the backlight side respectively, thereby fixing the two first photovoltaic modules 400.

[0054] Specifically, please refer to Figure 3 and Figure 4The photovoltaic system includes multiple photovoltaic modules, which are arranged in multiple rows along a first direction, including at least one row of first photovoltaic modules 400 and at least one row of second photovoltaic modules 900. Each row of second photovoltaic modules 900 is composed of multiple second photovoltaic modules 900 arranged along a second direction. In the second direction, the side of each second photovoltaic module 900 is fixed to the first beam 100. The first photovoltaic modules 400 and the second photovoltaic modules 900 are configured as rectangles of the same size, wherein the first photovoltaic modules are arranged horizontally and the second photovoltaic modules are arranged vertically.

[0055] It is understood that the first direction is generally referred to as vertical, and the second direction as horizontal. In this application, photovoltaic modules are arranged in a mixed manner of horizontal and vertical arrangement. For the first photovoltaic module 400, its length direction and arrangement direction are both the second direction, which is a horizontal arrangement, or horizontal row. Horizontally arranged photovoltaic modules are called horizontal row modules. For the second photovoltaic module 900, its length direction is the first direction, which is the same as the vertical direction. This is a vertical arrangement, or vertical row. Horizontally arranged photovoltaic modules are called vertical row modules.

[0056] In photovoltaic systems, photovoltaic modules are mainly arranged vertically, that is, the second photovoltaic modules 900 are mainly arranged. In some cases, to make full use of the available area at the installation location and install more photovoltaic modules to improve the power generation capacity of the photovoltaic system, several rows of first photovoltaic modules 400 are arranged horizontally. The first photovoltaic modules 400 and the second photovoltaic modules 900 can use photovoltaic modules of the same specifications. Considering that the photovoltaic system mainly arranges the second photovoltaic modules 900, the first beam 100 will be set corresponding to the second photovoltaic modules 900. However, when the length of the photovoltaic module is not an integer multiple of its width, in the second direction, at least one side of a row of first photovoltaic modules 400 will be located between two adjacent first beams 100. This side is also called the cantilever 401, which is supported by the support beam 500 to ensure the structural stability of the first photovoltaic modules 400.

[0057] It should be noted that please refer to the following as well. Figure 3 and Figure 4 The photovoltaic system will form a gap 331 on the side where the cantilever 401 is located, which will not be covered by photovoltaic modules. This gap 331 needs to be waterproofed by certain measures. A sealing plate 332 can be set at the gap 331, but is not limited to. The sealing plate 332 can be located above or below the support beam 500. It can be fixed to the support beam 500 or it can be fitted with the support beam 500 with a gap. Since the waterproofing at the gap 331 is not very relevant to the technical problem solved by this application, it will not be described in detail here.

[0058] In one embodiment, please refer to Figure 2The support beam 500 extends along the second direction to be fixedly connected to the first beam 100 and the cantilever portion 401, respectively. In this way, the first beam 100 provides support to the cantilever portion 401, thereby ensuring the structural stability of the first photovoltaic module 400. Alternatively, in other embodiments, the support beam 500 may extend along the first direction and be fixed to the cantilever portion 401 and the second beam 200, respectively; or the support beam 500 may extend obliquely relative to both the first and second directions, being fixed to the cantilever portion 401 while also being fixed to the first beam 100 and the second beam 200, respectively.

[0059] In this embodiment, the two ends of the support beam 500 are fixed to the cantilever portion 401 and the first beam 100, respectively. Furthermore, the support beam 500 is also fixed to another first beam 100 between its two ends. In this way, the force is distributed among multiple first beams 100, ensuring reliable support for the cantilever portion 401 and thus guaranteeing the structural stability of the first photovoltaic module 400. In other embodiments, the support beam 500 may be fixed to the first beam 100 only at its end away from the cantilever portion 401; alternatively, both ends of the support beam 500 may be fixed to two adjacent first beams 100, and fixed to the cantilever portion 401 between its two ends.

[0060] Further, please refer to Figure 2 For each cantilever section 401, multiple support beams 500 can be provided to enhance the support for the cantilever section 401 and to ensure uniform stress distribution among the structures, thereby contributing to the structural stability of the relevant structures. Specifically, the multiple support beams 500 are spaced apart in the first direction.

[0061] In one embodiment, please refer to Figures 7 to 9 The support beam 500 is provided with a limiting groove 510, and the cantilever part 401 includes a side frame 410, which engages within the limiting groove 510. In this way, the support beam 500 can directly engage with the side frame 410 of the cantilever part 401 through the limiting groove 510. After the side frame 410 and the limiting groove 510 are engaged, reliable fixation of the support beam 500 and the cantilever part 401 can be achieved. Fixing the support beam 500 and the cantilever part 401 is relatively simple and improves the assembly convenience of the photovoltaic system.

[0062] In one embodiment, please refer to Figures 7 to 9The side frame 410 includes a main body 411 and a protruding edge 412. The protruding edge 412 protrudes along the second direction on the side of the main body 411. The limiting groove 510 includes a receiving groove 511 and a slot 512 that are connected. The protruding edge 412 is inserted into the slot 512, and the main body 411 is received in the receiving groove 511. Thus, when the cantilevered part 401 and the support beam 500 are fixed, the main body 411 and the protruding edge 412 enter the receiving groove 511 from the opening of the receiving groove 511. When the protruding edge 412 and the slot 512 are opposite each other, the relative position of the side frame 410 and the support beam 500 is changed, so that the protruding edge 412 is inserted into the slot 512. In this way, there will be an angle between the direction in which the protruding edge 412 exits the slot 512 and the direction in which the main body 411 exits the receiving groove 511, which can realize the limiting cooperation between the limiting groove 510 and the side frame 410, thereby ensuring the reliable fixing of the cantilevered part 401 and the support beam 500.

[0063] Specifically, the protruding edge 412 is located on the backlight side of the first photovoltaic module 400, commonly referred to as the C-edge. After the first photovoltaic module 400 is placed in position, the support beam 500 can be extended into the backlight side of the first photovoltaic module 400. At this time, the opening of the receiving groove 511 faces the backlight side of the first photovoltaic module 400. When the main body 411 and the protruding edge 412 are aligned with the opening of the receiving groove 511, they can enter the receiving groove 511. The receiving groove 511 has a positioning wall surface opposite to the opening, and the slot 512 extends to the side from this positioning wall surface. When the main body 411 and the protruding edge 412 abut against this positioning wall surface, the support beam 500 is moved laterally, allowing the protruding edge 412 to be inserted into the slot 512, thereby completing the snap-fit ​​engagement between the side frame 410 and the limiting groove 510. That is, the structure of the limiting groove 510 can be well matched with the structure of the side frame 410 without additional modifications to the structure of the side frame 410.

[0064] Of course, in other embodiments, the side frame 410 may be provided with a buckle structure, which is fastened to the limiting groove 510 to achieve the engagement of the side frame 410 and the limiting groove 510.

[0065] Please see Figure 10 and Figure 11In one embodiment, the support beam 500 is equipped with a limiting clip 600, which has a slot 601. The cantilever portion 401 includes a side frame 410, which engages within the slot 601. Thus, the engagement of the side frame 410 and the slot 601 fixes the cantilever portion 401 and the limiting clip 600 relatively, and the limiting clip 600 is fixedly installed on the support beam 500, thereby fixing the cantilever portion 401 and the support beam 500 relatively. The limiting clip 600 allows for separate molding of the limiting clip 600 and the support beam 500. Compared to directly molding a groove structure on the support beam 500, molding the slot 601, which mates with the side frame 410, separately on the limiting clip 600 is more convenient and reliable, ensuring reliable fixation of the support beam 500 and the cantilever portion 401.

[0066] Furthermore, the card slot 601 is provided with an opening along the second direction, and the limiting card member 600 includes a first side wall 610, a second side wall 620 and a third side wall 630 that form the card slot 601. The first side wall 610 and the opening of the card slot 601 are opposite to each other, and the second side wall 620 and the third side wall 630 are provided opposite to each other. The second side wall 620 and the third side wall 630 abut against the side frame 410 on the light-facing side and the back-lighting side of the first photovoltaic module 400, respectively. Thus, the side frame 410 can be installed laterally through the opening of the slot 601. Since the third side wall 630 abuts against the side frame 410 on the backlight side of the first photovoltaic module 400, while the second side wall 620 abuts against the side frame 410 on the light-facing side of the first photovoltaic module 400, the visibility of the engagement between the limiting clip 600 and the side frame 410 is improved, facilitating operator observation and ensuring reliable fixation between the limiting clip 600 and the cantilever 401. It is understood that the first side wall 610 will also abut against the side of the side frame 410 located on the outer periphery of the first photovoltaic module 400, ensuring that the side frame 410 is inserted sufficiently into the slot 601. On opposite sides, the second side wall 620 and the third side wall 630 have sufficient area to abut against the side frame 410, ensuring reliable clamping of the side frame 410. Of course, in other embodiments, the slot 601 can also be configured according to the structure of the limiting groove 510 described above.

[0067] Furthermore, the third sidewall 630 is provided with a protruding rib 631, which is used to abut the bottom of the side frame 410. The protruding rib 631 can abut the protruding edge 412. The protruding rib 631 not only increases the rigidity and load-bearing capacity of the third sidewall 630, but also enhances the clamping effect on the side frame 410, so as to ensure that the side frame 410 can be reliably engaged in the slot 601.

[0068] Specifically, the limit card member 600 can be fixed to one end of the support beam 500 by self-tapping screws or other fasteners or welding, etc., and the opening of the card slot 601 will face away from the other end of the support beam 500. Optionally, the third side wall 630 protrudes on both opposite sides of the first side wall 610. On one side, it participates in constructing the card slot 601, and on the other side, it can be connected to the support beam 500 through the second fastener 820. The end of the support beam 500 correspondingly protrudes with a mounting plate 540. The third side wall 630 and the mounting plate 540 are fitted together and connected through the second fastener 820.

[0069] The present application does not limit the cross-sectional shape of the support beam 500. The cross-section of the support beam 500 can be in the Figure 9 and Figure 11 shown "□" shape, or Figure 13 and Figure 14 shown "U" shape. That is, the support beam 500 has multiple connected plate bodies to ensure that the structural strength of the support beam 500 can meet the reliable support for the cantilever part 401. In other embodiments, the cross-section of the support beam 500 can also be set to other shapes according to requirements, such as "I" shape or "L" shape or "E" shape or "F" shape, etc. When the structural strength meets the requirements, the support beam 500 can also have only one plate body.

[0070] Please refer to Figure 4 and Figure 5 together. In one embodiment, the first beam body 100 is formed with a water guide groove 110. The mounting support 700 is installed in the water guide groove 110, and the support beam 500 is fixed to the mounting support 700. In this way, the first beam body 100 can simultaneously have the functions of water guiding and support, which is beneficial to simplifying the structure of the photovoltaic system. Generally, other support structures will also be installed in the water guide groove 110 to fix the side of the photovoltaic module. This support structure can be configured with the same structure as the mounting support 700 to further simplify the structure of the photovoltaic system. Of course, in other embodiments, it can also be that the support beam 500 is directly installed on the first beam body 100.

[0071] Furthermore, the support beam 500 is fixed to the mounting bracket 700 by a first fastener 810. The support beam 500 has a strip-shaped hole 520 extending in the second direction for the first fastener 810 to pass through. This allows the support beam 500 to be easily assembled and disassembled from the mounting bracket 700, and by adjusting the position of the first fastener 810 within the strip-shaped hole 520, a certain tolerance for machining errors can be provided. Specifically, when installing the support beam 500, it can be pre-assembled with the first beam body 100 using the first fastener 810, and then the relevant structures and side frame 410 can be fitted together. Due to the strip-shaped hole 520, the support beam 500 has sufficient movement margin and provides a certain guiding effect for the fitting of the relevant structures and side frame 410. After the two are properly fitted, the first fastener 810 can be tightened. This improves the ease of installation of the support beam 500. Of course, in other embodiments, the support beam 500 and the mounting bracket 700 can also be connected by welding or plugging.

[0072] In one embodiment, please refer to Figure 12 Along the length of the support beam 500, a plurality of spaced-apart water passage holes 530 are provided at the bottom of the support beam 500. This allows for timely and reliable drainage through the water passage holes 530, preventing corrosion and rust caused by long-term water accumulation in the support beam 500, thereby ensuring the structural stability of the support beam 500. Alternatively, in other embodiments, a water-blocking structure may be provided above the support beam 500.

[0073] The above description is merely an exemplary embodiment of this application and does not limit the scope of protection of this application. Any equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the scope of protection of this application.

Claims

1. A photovoltaic system, characterized in that, include: Multiple first beams (100) extending along a first direction and multiple second beams (200) extending along a second direction, the first direction forming an angle with the horizontal plane, the multiple first beams (100) being spaced apart along the second direction, and the second beams (200) being connected to each of the first beams (100); At least one row of first photovoltaic modules (400) arranged along the second direction; in the second direction, the sides of two adjacent first photovoltaic modules (400) are fixed together, and at least one side of at least one row of first photovoltaic modules (400) forms a cantilever (401); the cantilever (401) and the first beam (100) and the second beam (200) are all spaced apart; A support beam (500), one part of which is fixed to the cantilever (401), and the other part of which is fixed to the first beam (100) or the second beam (200).

2. The photovoltaic system as described in claim 1, characterized in that, The support beam (500) extends along the second direction and is fixed at both ends to the cantilever (401) and the first beam (100), respectively.

3. The photovoltaic system as described in claim 2, characterized in that, The support beam (500) is also fixed to another first beam (100) between its two ends.

4. The photovoltaic system as described in claim 1, characterized in that, The support beam (500) is provided with a limiting groove (510), and the cantilever part (401) includes a side frame (410), which is engaged in the limiting groove (510).

5. The photovoltaic system as described in claim 4, characterized in that, The side frame (410) includes a main body (411) and a protruding edge (412). The protruding edge (412) protrudes along the second direction on the side of the main body (411). The limiting groove (510) includes a receiving groove (511) and a slot (512) that are connected. The protruding edge (412) is inserted into the slot (512), and the main body (411) is received in the receiving groove (511).

6. The photovoltaic system as described in claim 1, characterized in that, The support beam (500) is equipped with a limiting clip (600), the limiting clip (600) is provided with a slot (601), and the cantilever part (401) includes a side frame (410), the side frame (410) is engaged in the slot (601).

7. The photovoltaic system as described in claim 6, characterized in that, The slot (601) is provided with an opening along the second direction. The limiting card (600) includes a first sidewall (610), a second sidewall (620), and a third sidewall (630) forming the slot (601). The first sidewall (610) and the opening of the slot (601) are opposite to each other. The second sidewall (620) and the third sidewall (630) are provided opposite to each other. The second sidewall (620) and the third sidewall (630) abut against the side frame (410) on the light-facing side and the backlight side of the first photovoltaic module (400), respectively.

8. The photovoltaic system as described in claim 7, characterized in that, The third sidewall (630) is provided with a rib (631), which is used to abut the bottom of the side frame (410).

9. The photovoltaic system as described in claim 1, characterized in that, The first beam (100) has a water guide groove (110), and an installation support (700) is installed in the water guide groove (110). The support beam (500) is fixed to the installation support (700) by a first fastener (810). The support beam (500) has a strip hole (520) extending along the second direction, and the strip hole (520) is used for the first fastener (810) to pass through.

10. The photovoltaic system as described in claim 1, characterized in that, The bottom of the support beam (500) is provided with a plurality of water passage holes (530) arranged at intervals along its length.

11. The photovoltaic system according to any one of claims 1 to 10, wherein in the first direction, at least one side of the first photovoltaic module (400) is provided with at least one row of second photovoltaic modules (900) arranged along the second direction, and in the second direction, each side of the second photovoltaic module (900) is fixed to the first beam (100); The first photovoltaic module (400) and the second photovoltaic module (900) are configured as rectangles of the same size, wherein, The first photovoltaic module (400) is a horizontally arranged module, and the second photovoltaic module (900) is a vertically arranged module.

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