WO2010124529A1

WO2010124529A1 - Pv module frame, pv module and installation system thereof

Info

Publication number: WO2010124529A1
Application number: PCT/CN2010/000587
Authority: WO
Inventors: Chee Leong Palvin Chan; Johann Niehaus; Matthew Leducq; Andrew Beebe; Jacob Steele; Joseph Benga; Yu Wang
Original assignee: Wuxi Suntech Power Co., Ltd.
Priority date: 2009-04-29
Filing date: 2010-04-29
Publication date: 2010-11-04
Also published as: CN101877363A; CN102354717B; CN102354717A; CN101877363B

Abstract

A PV module (5) frame (6,7) comprises a groove portion, a sidewall vertical to the groove portion and a bottom portion vertical to the sidewall. Said bottom portion extends from the bottom of said sidewall toward the opposite direction of an opening of said groove portion. A PV module installation system will install said PV module onto a support, wherein the bottom portions of the adjacent PV modules are socket jointed and fixed to at least one installation beam(8) which is fixed to said support. The beneficial effect of is that: fast installation of a PV module could be realized only by using the improved frame and one installation beam, which reduces the quantity of the members in an installation system module and makes the installation more efficient, easier and more economical.

Description

PV MODULE FRAME, PV MODULE AND INSTALLATION

SYSTEM THEREOF

Cross-Reference to Related Applications

This application claims priority to Chinese Patent Application NO. 200910137269.3 entitled "PV Module Frame, PV Module and Installation System Thereof," filed on April 29, 2009; Chinese Patent Application NO. 200910178895.7 entitled "PV Module Frame, PV Module and Installation System Thereof," filed on September 30, 2009; and Chinese Patent Application NO. 200910223669.6 entitled "PV Module Frame, PV Module and Installation System Thereof," filed on November 20, 2009, the disclosures of which are hereby incorporated by reference in their entireties.

Field of the Invention

The present invention relates to the photovoltaic field, especially relates to a PV module frame and a PV module having said module frame, and further relates to an installation system for installing said PV module.

Background of the Invention

Encapsulation is a crucial step in the PV module production. As an important step in encapsulation process, frame up plays a role of increasing the module strength, further sealing module and prolonging operating life of the module. To be more important, the PV module can be installed on other parts such as walls, roofs of buildings or the like by using the PV module frame disposed around the PV module.

The invention patent possessed by this applicant under patent No. 200520140581.5 granted on April 18, 2007 provides a large-scale PV module frame with adhesive accommodating slot as shown in Fig. 1, wherein a groove portion 1' provided on the upper side of the frame includes an upper cavity portion 11', a lower cavity portion 12' and a side portion 13'. The groove portion 1' is formed as a wedge-shaped adhesive accommodating slot with a bottom thereof is larger than a notch thereof, in which one of the edges of a PV module 5' is placed. A sidewall 2' is provided on the left side of the frame between the groove portion and a bottom portion 3' of the frame. The bottom portion 3' provided on the lower side of the frame extends from the bottom of said sidewall 2' toward the same direction of the opening (Le., notch) of said groove portion.

In the prior art, the installation of PV module is usually realized by vertical and horizontal sectional materials. Concretely speaking, vertical and horizontal sectional materials are fixed on walls, roofs of the building or the like and then the frames of the PV module are connected thereto. By this way, the PV module is finally fixed on walls, roofs of the building or the like.

When implementing embodiments of the present invention, the inventors find at least the following problems existing in the prior arts: vertical and horizontal sectional materials fixed on the walls or roofs of the building or the like are necessary when a PV module is being installed. Besides, the connection structure between the frames and vertical and horizontal sectional materials is complicated, so that it takes more time and efforts to have the PV module installed and large quantity of parts of the whole PV module installation system are required.

Summary of the Invention

The object of the present invention is to provide a PV module frame, a PV module and a PV module installation system so as to realize the fast installation of PV module and to reduce the quantity of parts of the PV module installation system.

[In order to achieve the above-mentioned object, the present invention provides a PV module frame comprising a groove portion, a sidewall vertical to the groove portion and a bottom portion vertical to the sidewall, said bottom portion extending from the bottom of said sidewall toward the opposite direction of an opening of said groove portion.

Preferably, said PV module frame further includes a side portion extending upwards from the free end of the bottom portion along the direction vertical to the bottom portion.

The present invention further provides a PV module comprising a lamination of solar cells and frames, each frame including a groove portion, a sidewall vertical to the groove portion and a bottom portion vertical to the sidewall, wherein at least on one side of said PV module and on the other side opposite to said one side, each of the bottom portions of the frames extends from a bottom of the sidewall towards an opposite direction of an opening of the groove portion.

Preferably, the width of the bottom portion of the frame on said one side is greater than that of the bottom portion of the frame on said the other side.

Preferably, the frame(s) on said one side and/ or said the other side include(s) side portion(s) extending upwards from the free end of bottom portion along the direction vertical to the bottom portion. Besides, the width of the bottom portion of frame on said one side is greater than that of the bottom portion of frame on said the other side so that the frame with a smaller width could be socket jointed to that with a greater width.

The present invention further provides a PV module installation system for installing two or more said PV modules onto a support, wherein bottom portions of frames of adjacent PV modules are socket jointed and fixed to at least one installation beam which is fixed to said support.

Preferably, at least one of frames on the adjacent sides of said adjacent PV modules includes a side portion.

Preferably, said installation beam and said bottom portion are fixed through a fastener. The present invention at least have the following beneficial effects: simple structure; small quantity of the installation parts; the installation of PV module could be realized only by using the structure-improved frames and an installation beam, which makes the installation quick, convenient, efficient and time-saving.

Brief Description of the Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention, wherein:

Fig. 1 is a cross-sectional view of the PV module frame in the prior art;

Fig. 2 is a cross-sectional view of the PV module frame of an embodiment of the present invention;

Fig. 3 is a cross-sectional view of the PV module frame of another embodiment of the present invention;

Fig. 4 is a perspective view of the PV module frame of another embodiment of the present invention;

Fig. 5 is a perspective view of the PV module frame of a further embodiment of the present invention;

Fig. 6 is a perspective view of the PV module of an embodiment of the present invention;

Fig. 7 is a perspective view of the PV module of another embodiment of the present invention;

Fig. 8 is a perspective view of the PV module of a further embodiment of the present invention;

Fig. 9 is a perspective view of the PV module installation system of an embodiment of the present invention; Fig. 10 is an enlarged view of the part enclosed by the broken lines in Fig. 9;

Fig. 11 is a cross-sectional view of the adjacent PV module frames in a socket joint state as shown in Fig. 10;

Fig. 12 is another enlarged view of the part enclosed by the broken lines in Fig. 9;

Fig. 13 is a cross-sectional view of the adjacent PV module frames in a socket joint state as shown in Fig. 12;

Fig. 14 is another enlarged view of the part enclosed by the broken lines in Fig. 9;

Fig. 15 is a cross-sectional view of the adjacent PV module frames in a socket joint state as shown in Fig. 14;

Fig. 16 is a side view showing the PV module installation system of an embodiment of the present invention and an upright post in a connection state;

Fig. 17 is a rear view of the PV module installation system observed in the direction that the arrow indicates in Fig.16;

Fig. 18 is a perspective view of an embodiment of connection between the installation beam and the upright post;

Fig. 19 is an enlarged side view of the view shown in Fig. 18 (omitting the fastening bolts in Fig. 18), wherein the PV module fixed onto the installation beam is shown;

Fig. 20 is a perspective view of another embodiment of the connection piece;

Fig. 21 is a side view of the connection piece in Fig. 20;

Fig. 22 is a top view of the connection piece in Fig. 20;

Fig. 23 is a rear view of the connection piece in Fig. 20; and

Fig. 24 is a perspective view of a further embodiment of the connection piece. Detailed Description on the Embodiments

Now, the detail description will be made with reference to the accompanying drawings and the preferred embodiments of the present invention.

Fig. 2 is a cross-sectional view of the PV module frame (hereinafter short for "frame") of an embodiment of the present invention. As shown in Fig. 2, the frame of the embodiment of the present invention comprises a groove portion 1 , a sidewall 2 vertical to the groove portion 1 and a bottom portion 3 vertical to the sidewall 2. The groove portion 1 is a wedge-shaped adhesive accommodating slot with a bottom thereof larger than an opening thereof The bottom portion 3 extends from the bottom of the sidewall 2 toward the opposite direction of the opening of the groove portion 1.

Comparing Fig. 2 with Fig.l, the main improvement of the frame of the present invention with respect to the frame of the prior art is the extension direction of the bottom portion 3. After adopting such a configuration, when the adjacent two PV modules are installed, the bottom portions 3 of the frames on their adjacent sides could be socket jointed together, and thus be connected and fixed quickly through a fastener, which will make the connection not only between the adjacent frames (i.e. between the adjacent PV modules) but also between the frame and other part quick and simple.

Fig. 3 is a cross-sectional view of the PV module frame of another embodiment of the present invention. As shown in Fig.3, the frame may further include a side portion 4 extending upwards from the free end of the bottom portion 3 along the direction vertical to the bottom portion 3. The height H of the side portion 4 is no greater than that of the side portion 2. The connection strength of the adjacent PV modules is increased and the module installation is more convenient with the aid of said side portion. In the embodiments of the present invention, as shown in Fig.3, the sidewall 2 is of a cavity structure in which the reinforcement plate 23 such as a steel plate is provided to strengthen bending strength of the sidewall 2. The reinforcement plate 23 is located in the middle of the sidewall 2 and kept closely to the inner wall of the cavity structure. Its length is no smaller than the width of the installation beam 8 described below, which could be selected according to the concrete practical environments and its installation strength needed. In addition, preferably, after the reinforcement plate 23 is provided into the cavity structure, the two ends of cavity structure are sealed with sealing materials to prevent the reinforcement plate 23 from the outside environment.

Fig. 4 is a perspective view of the PV module frame of another embodiment of the present invention. As shown in the drawing, a wiring hole 24 can be opened on the sidewall 2; a wiring slot 41 could be accordingly set on the side portion 4 for wiring, through which the power cord can be connected to the other PV modules. A power cord recess 240 (in order to simplify the views of Fig.6 to Fig.14, the power cord recess 240 is omitted) is provided on both the wiring hole 24 and the wiring slot 41. By doing so, the power cord can be fixed, which not only saves space but also exhibits a better appearance. Fig.5 shows a perspective view of the PV module frame of a further embodiment of the present invention in which another structure of the side portion 4 is shown.

Figs. 6-8 show the views of the PV module of embodiments of the present invention. The PV module 5 comprises a lamination of solar cells and frames. As shown in Fig. 6, the width Ll (i.e. the extended distance of the bottom portion from the bottom of its sidewall) of the bottom portion of the frame installed on one side of the PV module could be greater than the width L2 of the bottom portion of the frame installed on the other side opposite to said one side so that the frame with a smaller width could be socket jointed to the one with a greater width. Fig. 7 shows that both the frames on one side and the other side include side portions. Fig. 8 shows that only the frame on one side includes a side portion, wherein the width of bottom portion of frame on the one side could be greater than that of bottom portion of frame on the other side of the PV module so that the frame with a smaller width could be socket jointed to that with a greater width. The PV module 5 shown in the drawing only shows the frames installed on the two opposite sides which are connected to the adjacent PV modules and the structure of the side portion in the drawing takes the structure of the side portion 4 shown in Fig. 4 as an example. However, it should be understood that frames can also be installed on the other two sides. Besides, according to the need of practical module installation, the frames on the other two sides could adopt the frame structures of the present invention or the frame structures of prior arts as shown in Fig.1. When the frames on the other two sides adopt the frames structures of prior arts as shown in Fig. 1, among the frames shown in Fig. 7, the length of side portion on one side is smaller than that on the other side so that the frame with a smaller side portion length could be socket jointed to the frame with a greater side portion length of the adjacent PV module, i.e. to avoid interference between this side portion and the front and rear side frames of the adjacent PV module.

Fig. 9 shows the PV module installation system of an embodiment of the present invention. This system is used to install the PV module onto a support. This support can be fixed to the ground installation base or walls or roofs of the building or the like. As shown in the drawings, the bottom portions of the adjacent PV modules are socket jointed to each other and fixed on at least one installation beam 8. The bottom portions of two frames on the adjacent sides of the adjacent PV modules (i.e. the first frame 6 and the second frame 7) have different widths. The frame with a bottom portion of smaller width L2 is socket jointed to the one with a bottom portion of greater width Ll and then the module frames 6 and 7 are fixed and connected to the installation beam 8 by using the fastener such as a bolt. In order to make the orientation of the PV module and the installation beam 8 more accurate and faster, a fastener 11 such as a u-shaped bolt could be provided on the module frames, through which the installation beam 8 goes to achieve accurate orientation with the module. By doing so, the adjacent PV module could be quickly installed and grouped into one unity only by using the frames and an installation beam 8.

Fig. 10 is an enlarged view of the part enclosed by the broken lines in Fig. 9. For the purpose of clarity, only the first frame 6 and the second frame 7 on the adjacent sides of the adjacent PV modules are shown. The bottom portions of the first frame 6 and the second frame 7 are socket jointed as shown in Fig. 11. Fig. 12 is another enlarged view of the part enclosed by the broken lines in Fig. 9. In the case that the first frame 6 and the second frame 7 comprise the side portions, the first frame 6 and the second frame 7 could be socket jointed as shown in Fig. 13. At this time, the following structures could be adopted: supposing that the width of the bottom portion of the first frame 6 is Ll, the width of the bottom portion of the second frame 7 is L2 and the thickness of the sidewall of the second frame 7 is L3, then the relationship L1-L2 > L3 is satisfied. In addition, the length of the side portion of the first frame 6 should ensure that the first frame 6 could be socket jointed to the second frame 7, that is to say, the entad-retracted distance L4 of the two ends of the side portion of the first frame 6 should be appropriate to avoid interference between this side portion and the front and rear side frames of the adjacent PV module. Fig. 14 is another enlarged view of the part enclosed by the broken lines in Fig. 9. At this time, the bottom portions of the first frame 6 and the second frame 7 could be socket jointed as shown in Fig. 15.

Figs. 16 and 17 are views that the PV module and the installation beam 8 are installed to a support after connected and fixed. Fig. 16 takes an upright post 10 as a support as an example to illuminate the situation of system installation. As shown in the drawings, in order to facilitate the adjustment of the installation angle between the PV module and the ground, a socket 9 as a connection piece is fixed to the bottom of the installation beam 8 of the PV module installation system in the embodiment of this present application, which is connected to the top of the upright post 10. In this situation, adjusting the orientation of the PV module according to the direction of sunlight could be realized.

Figs. 18 and 19 show the views of an embodiment of connection between the installation beam and the support. As shown in the figures, the support being the upright post 10 is taken as an example to make an illustration. The installation beam 8 is fixed onto the upright post 10 by a connection piece. The connection piece comprises an upper sleeve 91 socket jointed to the installation beam 8, a lower sleeve 92 socket jointed to the upright post 10 and a middle support plate 93, wherein an upper end surface and a lower end surface of said middle support plate 93 are connected to the upper sleeve 91 and the lower sleeve 92 respectively, and an included angle is formed between the upper end surface and the lower end surface of said middle support plate 93. Considering that there may be installation gaps between the upper sleeve 91 and the installation beam 8 and between the lower sleeve 92 and the upright post 10, fastening bolts and the like are provided to strengthen the connecting stableness between each other. The shapes of the upper sleeve 91 and the lower sleeve 92 respectively match to the shapes of the installation beam 8 and the upright post 10. The orientation of the PV module could be adjusted by changing the included angle between the upper end surface and the lower end surface of the middle support plate. When the PV module is used, an included angle fit for local installation could be precalculated according to the practical situation (longitude, latitude and so on) of an installation place and a connection piece with a corresponding middle support plate could also be manufactured. Under such a circumstance, the orientation of the PV module could be adjusted by the connection piece with the corresponding middle support plate.

Figs. 20-23 show the views of another embodiment of the connection piece. The connection piece in this embodiment differs from the connection piece in Fig. 18 in the structure of the lower sleeve 92. More specifically, at least one slot 921 in a longitudinal direction of the upright post 10, (two slots as shown in figures) is opened to the lower sleeve 92. A length of the slot 921 is smaller than that of the lower sleeve 92 in said longitudinal direction. A clamping plate 922 to be clamped by a bolt is provided on a surface of the lower sleeve 92 on each side of each slot 921. To allow a bolt to pass through the clamping plates, a hole 923 used for a bolt to pass through (not shown in Figs. 21-22) is opened to the clamping plate 922 on one side of the slot 921 and corresponds to a hole 923 opened to the other clamping plate 922 on the other side of the slot 921. As shown in Figs. 20 and 23, the holes 923 in the clamping plates 922 on both sides of the slot 921 are through holes. Of course, the following structure could also be adopted: the hole in one clamping plate is a through hole while the hole in the other clamping plate is a thread hole. In use, a bolt is screwed into holes 923 in the clamping plates 922 on both sides of each slot 921 after the lower sleeve 92 has been socket jointed to the upright post 10. Thus the inner diameter of the lower sleeve 92 is reduced so that the lower sleeve 92 is securely socket jointed to the upright post 10. Fig. 24 shows a perspective view of a further embodiment of the connection piece. In this embodiment, a through hole used for a bolt to pass through is opened to the clamping plate 922 on one side of the slot 921 and corresponds to a through hole opened to the other clamping plate 922 on the other side of the slot 921, and a nut 924 is provided on the outer side of the through hole in one of the clamping plates. The nut 924 may be fixed to the clamping plate 922 by welding or other means. Subsequently, a brief introduction of the installation steps of this installation system is provided as below:

Firstly, a row of PV modules are installed on the installation beam 8. Concretely speaking, the bottom portions of the first frame and the second frame on the adjacent sides of the adjacent two PV modules are socket jointed and then the socket jointed frames are fixed to the installation beam 8 by using a fastener such as a bolt to form a row of PV modules fixed on the installation beam 8 as shown in Fig.9. During the installation of the row of PV modules and the installation beam 8, the orientation could be more convenient and fast by providing U-shaped bolts disposed on the frames and through which the installation beam 8 goes. The power cords of PV modules are connected to each other through the wiring holes and the wiring slots of the frames. In this situation, the installation of the PV module could be realized by only one installation beam 8. Of course, according to the sizes of module and need of installation strength, more installation beams could be provided or the width of the installation beam could be increased.

Subsequently, the installation beam 8 on which the PV modules are fixed is connected to the support such as an upright post 10. For example, as shown in Fig.16, the socket 9 as a connection piece fixed to the installation beam 8 is connected to the top of the upright post 10. And the exampled connection piece shown in Figs. 18, 20 or 24 is adopted to connect the installation beam 8 with the support such as the upright post 10. Since the support is fixed and connected with the ground installation base, the walls or roofs of the building or the like, the module could be fixed on the walls or roofs of the building or the like fast and conveniently by the aforesaid manner. According to actual needs of the installing capacity, multi-row PV modules can be formed. Figs.16 and 17 show two rows of installed PV modules. In this way, the PV module installation system suitable to a variety of practical occasions could be formed. Besides, in the above-mentioned PV module installation system, when the sidewall of the module frame is of cavity structure, in order to ensure the bending strength of the installed module, the reinforcement plate can be provided in the cavity structure.

In addition, during the above-mentioned embodiments of the present invention, a stainless steel grounded plate of small volume could be provided on the back of the PV module, which is used to electronically connect the frame made of conductive materials such as aluminum with the installation beam 8 made of conductive materials such as steel. And then the grounded socket (e.g. made of tin-copper) connected with the grounded lead is provided on the installation beam 8. In this way, the security of the installation system could be increased. Other known security structures are also available.

The present invention describes the structures of frames installed on the two opposite sides of the PV module. It should be understood that it is available if only the frames on the adjacent sides of the adjacent PV modules fixed and connected to the installation beam adopt the frame structures as mentioned in the present invention while the frames on the other two sides make use of other structures. Besides, each feature published in the present invention could be assembled with one another.

With the above-mentioned installation system, the installation of the PV module could be realized only by the structure-improved frames and an installation beam. It can be seen that this installation system greatly simplifies the structure of the installation system, increases the speed of installation of the PV module and reduces costs of system installation.

It should be understood that the above-described embodiments are not limited by any of the details of the foregoing description, unless otherwise specified, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the metes and bounds of the claims, or equivalence of such metes and bounds are therefore intended to be embraced by the appended claims.

Claims

CLAIMS What is claimed is:

1. A PV module frame, comprising: a groove portion; a sidewall vertical to the groove portion; and a bottom portion vertical to the sidewall, wherein said bottom portion extending from the bottom of said sidewall toward an opposite direction of an opening of said groove portion.

2. The PV module frame according to claim 1, wherein said sidewall is of cavity structure.

3. The PV module frame according to claim 2, wherein a reinforcement plate for strengthening a bending strength of the sidewall is provided within said cavity structure.

4. The PV module frame according to any one of claims 1 to 3, wherein a wiring hole is opened on said sidewall.

5. The PV module frame according to claim 4, wherein a recess of a power cord is provided on said wiring hole.

6. The PV module frame according to any one of claims 1 to 3, further including a side portion extending upwards from a free end of the bottom portion along a direction vertical to the bottom portion.

7. The PV module frame according to claim 6, wherein a height of said side portion is less than or equal to a height of said sidewall.

8. The PV module frame according to claim 6, wherein a wiring hole is opened on the sidewall and a corresponding wiring slot is opened on the side portion.

9. The PV module frame according to claim 8, wherein recesses of a power cord are provided on said wiring hole and said wiring slot, respectively.

10. A PV module, comprising: a lamination of solar cells and frames, said frame comprising a groove portion; a sidewall vertical to the groove portion and a bottom portion vertical to the sidewall, wherein at least on one side of said PV module and on the other side opposite to said one side, each of the bottom portions of the frames extends from a bottom of the sidewall towards an opposite direction of an opening of the groove portion.

11. The PV module frame according to claim 10, wherein the sidewalls of the frames on said one side and said the other side are of cavity structure in which a reinforcement plate for strengthening bending strength of the sidewall is provided.

12. The PV module according to claim 10 or 11, wherein a wiring hole is opened on said sidewall.

13. The PV module according to claim 12, wherein a recess of a power cord is provided on said wiring hole.

14. The PV module according to claim 10, wherein the width of the bottom portion of the frame on said one side is greater than that of the bottom portion of the frame on said the other side.

15. The PV module according to claim 10, wherein the frame on said one side and/or said the other side includes a side portion extending upwards from a free end of bottom portion along a direction vertical to the bottom portion, and furthermore, a width of a bottom portion of frame of said one side is greater than that of a bottom portion of frame of said the other side so that the frame with a smaller width could be socket jointed to that with a greater width.

16. The PV module according to claim 15, wherein a wiring hole is opened on said sidewall and a corresponding wiring slot is opened on said side portion.

17. The PV module according to claim 16, wherein recesses of a power cord are provided on said wiring hole and said wiring slot, respectively.

18. A PV module installation system for installing two or more PV modules according to any one of claims 10 to 14 on a support, wherein bottom portions of frames of adjacent PV modules are socket jointed and fixed to at least one installation beam which is fixed to said support.

19. The PV module installation system according to claim 18, wherein at least one of the frames on the adjacent sides of said adjacent PV modules includes a side portion.

20. The PV module installation system according to claim 18, wherein said installation beam and said bottom portion are fixed by a fastener.

21. The PV module installation system according to claim 20, wherein said fastener is a bolt.

22. The PV module installation system according to claim 20, wherein said PV modules further includes U-shaped bolts disposed on the frames through which said installation beam goes.

23. The PV module installation system according to claim 18 or 22, wherein said support is an upright post onto which said installation beam is fixed by a connection piece, said connection piece comprises an upper sleeve socket jointed to the installation beam, a lower sleeve socket jointed to the upright post and a middle support plate, wherein an upper end surface and a lower end surface of said middle support plate are connected to the upper sleeve and the lower sleeve respectively, and an included angle is formed between the upper end surface and the lower end surface of said middle support plate.

24. The PV module installation system according to claim 23, wherein fastening bolts are provided onto said upper sleeve and / or said lower sleeve.

25. The PV module installation system according to claim 23, wherein fastening bolts are provided onto said upper sleeve, and at least one slot in a longitudinal direction of the upright post is opened to said lower sleeve, wherein a length of said slot is smaller than that of said lower sleeve in said longitudinal direction, and a clamping plate to be clamped by a bolt is provided on the surface of the lower sleeve on each side of said slot.

26. The PV module installation system according to claim 25, wherein a hole used for a bolt to pass through is opened to the clamping plate on one side of said slot and corresponds to a hole opened to the other clamping plate on the other side of said slot, wherein both of the two holes in the clamping plates are through holes, or the hole in one clamping plate is a through hole while the hole in the other clamping plate is a thread hole.

27. The PV module installation system according to claim 25, wherein a through hole used for a bolt to pass through is opened to the clamping plate on one side of said slot and corresponds to a through hole opened to the other clamping plate on the other side of said slot, and a nut is provided on the outer side of the through hole in one of the clamping plates.