JP6587597B2 - Photovoltaic power generation system and fixing member - Google Patents

Description

  The present invention relates to a photovoltaic power generation system in which a solar cell module is fixed by a fixing member, and a fixing member for fixing the solar cell module.

  Conventionally, in a solar cell module having a solar cell panel configured by arranging a plurality of solar cells, in order to protect the outer edge of the solar cell panel and improve the strength of the solar cell panel, the outer edge of the solar cell panel is used. Some have a holding frame that holds the entire circumference. The holding frame also functions as a fixture with which the fixing member comes into contact when the solar cell module is installed.

  Since a load is applied to the solar cell module due to snow and wind, the holding frame needs to ensure strength to withstand the load. Generally, aluminum is used as a material for the holding frame from the viewpoint of durability and weight.

  An intermediate fixing member on which the solar cell module is placed is provided on the installation surface on which the solar cell module is installed. The solar cell module is placed on the installation surface by being placed on the intermediate fixing member and fixed by the fixing member. Generally, the width of the intermediate fixing member is shorter than the width of the solar cell module. Therefore, a gap is formed between the holding frame of the solar cell module and the installation surface.

  Since a gap is formed between the holding frame of the solar cell module and the installation surface, the holding frame may be deformed and damaged when a load is applied to the solar cell module. Therefore, like the solar panel fixing device disclosed in Patent Document 1, it is necessary to support the entire holding frame with an intermediate fixing member or to increase the thickness of the holding frame to suppress deformation of the holding frame. There is.

JP 2001-144314 A

  However, according to the above conventional technique, even when the solar cell module is installed in an area where there is almost no snow, the configuration for suppressing the deformation of the holding frame is adopted, so that the holding frame actually Even though there is no risk of deformation, the holding frame is manufactured with excessive strength specifications.

  This invention is made | formed in view of the above, Comprising: It aims at obtaining the solar power generation system which can change the intensity | strength of a holding | maintenance frame easily according to installation environment.

  In order to solve the above-described problems and achieve the object, a photovoltaic power generation system according to the present invention includes a solar cell panel including a photoelectric conversion unit that converts light incident on a light receiving surface into electric power, and a solar cell panel A solar battery module having a holding frame for holding an outer edge; a main fixing member for fixing the solar battery module to an intermediate fixing member provided at an installation location; and being sandwiched between the main fixing member and the intermediate fixing member A sub-fixing member. The main fixing member includes a fixing portion that is fixed to the intermediate fixing member, and a main light receiving surface side contact portion that extends from the fixing portion and contacts the holding frame from the light receiving surface side. The sub-fixing member includes a base sandwiched between the fixing unit and the intermediate fixing member, and a sub-back side abutting projecting from the base to the solar cell module side and abutting on the holding frame from the back side opposite to the light receiving surface Part. The length of the sub-back side abutting portion along the first direction, which is the direction in which the holding frame with which the sub-back side abutting portion abuts, is longer than the length of the fixing portion along the first direction.

  According to the photovoltaic power generation system of the present invention, there is an effect that the strength of the holding frame can be easily changed according to the installation environment.

The disassembled perspective view of the solar cell module with which the solar power generation system concerning Embodiment 1 of this invention is provided. Plan view of solar cell module according to Embodiment 1 The perspective view of the solar energy power generation system concerning Embodiment 1. Partial sectional view cut along line IV-IV shown in FIG. In the photovoltaic power generation system concerning Embodiment 1, it is an expansion perspective view of the part which fixes a solar cell module, Comprising: The figure which shows the state except a solar cell module The perspective view of the sub fixing member in Embodiment 1 The perspective view which shows the modification 1 of the auxiliary | assistant fixing member in Embodiment 1. FIG. The perspective view of the solar energy power generation system using the subfixation member concerning the modification 1 Partial sectional view cut along line IX-IX shown in FIG. It is an expansion perspective view of the part which fixes a solar cell module using the auxiliary fixing member concerning modification 1, and is a figure showing the state where a solar cell module was removed. The perspective view which shows the modification 2 of the auxiliary | assistant fixing member in Embodiment 1. FIG. The perspective view of the solar energy power generation system using the auxiliary | assistant fixing member concerning the modification 2. Partial sectional view cut along line XIII-XIII shown in FIG. It is an expansion perspective view of the part which fixes a solar cell module using the sub fixing member concerning the modification 2, Comprising: The figure which shows the state except a solar cell module The perspective view which shows the modification 3 of the auxiliary | assistant fixing member in Embodiment 1. FIG. The perspective view of the solar energy power generation system using the auxiliary | assistant fixing member concerning the modification 3. Partial sectional view cut along line XVII-XVII shown in FIG. It is an expansion perspective view of the part which fixes a solar cell module using the sub fixing member concerning the modification 3, Comprising: The figure which shows the state except a solar cell module The perspective view of the solar energy power generation system using the auxiliary | assistant fixing member concerning the modification 4. Partial sectional view cut along line XX-XX shown in FIG. Schematic diagram showing the positional relationship between the holding frame and the fixing member in the first embodiment. Schematic diagram showing another example of the positional relationship between the holding frame and the fixing member in the first embodiment. Typical bending moment diagram under uniform load when the holding frame in Embodiment 1 is regarded as a supporting beam supported at two points

  Below, the photovoltaic power generation system and fixing member concerning embodiment of this invention are demonstrated in detail based on drawing. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
First, the solar cell module with which the solar power generation system concerning Embodiment 1 of this invention is provided is demonstrated. FIG. 1 is an exploded perspective view of a solar cell module provided in the photovoltaic power generation system according to Embodiment 1 of the present invention. FIG. 2 is a plan view of the solar cell module according to Embodiment 1. FIG.

  The solar cell module 80 includes a solar cell panel 70 and a holding frame 10 that surrounds the outer edge of the solar cell panel 70 over the entire circumference. The solar cell panel 70 is a photoelectric conversion unit that converts sunlight into electric power, and includes a plurality of solar cells 60 arranged side by side. Glass which is a transparent substrate (not shown) is disposed on the light receiving surface 70 a side of the solar battery cell 60. The plurality of solar cells 60 are connected in series or in parallel. The solar battery panel 70 is formed by sealing a plurality of solar cells 60 arranged side by side with an electrically insulating material such as ethylene vinyl acetate (EVA) resin or polyethylene terephthalate (PET) resin. Is formed.

  Next, a solar power generation system including the solar cell module 80 will be described. FIG. 3 is a perspective view of the photovoltaic power generation system according to the first embodiment. FIG. 4 is a partial cross-sectional view taken along the line IV-IV shown in FIG. FIG. 5 is an enlarged perspective view of a portion for fixing the solar cell module 80 in the photovoltaic power generation system according to the first embodiment, and shows a state in which the solar cell module 80 is removed.

  The solar power generation system 100 is configured by fixing the solar cell module 80 at an installation location using the main fixing member 20, the sub fixing member 21, and the intermediate fixing member 23.

  The intermediate fixing member 23 is fixed to an installation surface on which the solar power generation system 100 is installed, for example, a roof surface. The intermediate fixing member 23 has a rod shape and is arranged in parallel with one side of the solar cell module 80. The intermediate fixing member 23 is fixed to the roof surface by screwing a wood screw (not shown) into the roof through a hole 26 formed in the bottom surface 23a. In the intermediate fixing member 23, grooves 23b extending in the longitudinal direction of the intermediate fixing member 23 and facing each other are formed. As shown in FIG. 4, a plate-like auxiliary fixing member 22 is inserted into the groove 23b. The auxiliary fixing member 22 is formed with a screw hole 22a.

  The main fixing member 20 is fixed to the intermediate fixing member 23 via the auxiliary fixing member 22. The main fixing member 20 includes a fixing portion 20a fixed to the intermediate fixing member 23, and a main light receiving surface side contact portion 20b extending from the fixing portion 20a and contacting the holding frame 10 from the light receiving surface 70a side. A hole 24 is formed in the fixed portion 20a. The main fixing member 20 is fixed to the intermediate fixing member 23 by screwing a bolt 25 passed through the hole 24 into a screw hole 22a of the auxiliary fixing member 22. The main light receiving surface side contact portion 20b of the main fixing member 20 contacts the holding frame 10 of the solar cell module 80 from the light receiving surface 70a side by fixing the main fixing member 20 to the intermediate fixing member 23.

  FIG. 6 is a perspective view of the auxiliary fixing member 21 in the first embodiment. The sub-fixing member 21 includes a base portion 21a sandwiched between the fixing portion 20a of the main fixing member 20 and the intermediate fixing member 23, and a back surface that projects from the base portion 21a toward the solar cell module 80 and is opposite to the light receiving surface 70a. And a sub-back-side contact portion 21b that contacts the holding frame 10 from the 70b side. A hole 21c is formed in the base portion 21a. By passing the bolt 25 for fixing the main fixing member 20 to the intermediate fixing member 23 through the hole 21c formed in the base 21a, the sub fixing member 21 is fixed to the intermediate fixing member 23 together with the main fixing member 20.

  The solar cell module 80 is fixed to the intermediate fixing member 23 by holding the holding frame 10 between the main light receiving surface side contact portion 20b and the sub back surface side contact portion 21b. Thereby, the solar cell module 80 is fixed to the roof which is the installation location via the intermediate fixing member 23. As described above, the fixing member that fixes the solar cell module 80 to the installation location includes the main fixing member 20 and the sub-fixing member 21.

  The sub-back-side contact portion 21b has a length f along the first direction that is the direction in which the holding frame 10 with which the sub-back-side contact portion 21b abuts, that is, the direction indicated by the arrow X, indicated by the arrow X. It is longer than the length e of the fixed portion 20a along the direction. The length e of the fixing portion 20a along the direction indicated by the arrow X is equal to the length of the intermediate fixing member 23 along the direction indicated by the arrow X.

  In the photovoltaic power generation system 100 configured as described above, the distance c between the sub-back-side contact portions 21b of the sub-fixing member 21 is shorter than the distance a between the main fixing members 20. In addition, the distance d from the sub-back-side contact portion 21 b of the sub-fixing member 21 to the end of the holding frame 10 is shorter than the distance b from the main fixing member 20 to the end of the holding frame 10. Generally, the stress generated in the holding frame 10 when a load is applied to the solar cell module 80 depends on the distance a and the distance b, and the stress generated in the holding frame 10 increases as the distance a and the distance b increase. Become. In the present embodiment, by using the sub-fixing member 21, it is possible to satisfy distance a> distance c and distance b> distance d, so that stress generated in the holding frame can be suppressed. Thereby, the deformation | transformation of the holding frame 10 at the time of a load being applied to the solar cell module 80 can be suppressed, and damage to the holding frame 10 can be prevented.

  Further, for example, in an area where there is almost no snow cover, if the solar cell module 80 is fixed by the main fixing member 20 without using the sub-fixing member 21, in an area where the load is hardly applied to the solar cell module 80 due to snow, There is no need to manufacture the holding frame 10 or the main fixing member 20 with an excessive strength specification. Therefore, it is possible to reduce the material used, reduce the weight of the holding frame 10 and the main fixing member 20, improve the handleability, and reduce the manufacturing cost. Further, the weight reduction of the holding frame 10 and the main fixing member 20 reduces the installation location due to the load resistance of the installation location. That is, it is possible to improve the degree of freedom in selecting the installation location of the photovoltaic power generation system 100.

  FIG. 7 is a perspective view showing a first modification of the auxiliary fixing member 21 in the first embodiment. FIG. 8 is a perspective view of a photovoltaic power generation system 100 using the auxiliary fixing member 21 according to the first modification. 9 is a partial cross-sectional view taken along line IX-IX shown in FIG. FIG. 10 is an enlarged perspective view of a portion for fixing the solar cell module 80 using the sub-fixing member 21 according to the first modification, and shows a state in which the solar cell module 80 is removed.

  The auxiliary fixing member 21 according to the modified example 1 protrudes in the second direction from the back surface 70b side of the solar cell panel 70 toward the light receiving surface 70a, that is, in the direction indicated by the arrow Y, and is moved to the holding frame 10 from the light receiving surface 70a side. A sub-light-receiving surface-side abutting portion 21d that abuts is provided.

  The sub light receiving surface side contact portion 21d is provided side by side on both sides along the direction indicated by the arrow X with respect to the main light receiving surface side contact portion 20b. When the sub-fixing member 21 according to the first modification is used, the holding frame 10 is sandwiched between the main light receiving surface side contact portion 20b, the sub light receiving surface side contact portion 21d, and the sub back surface side contact portion 21b. Thus, the solar cell module 80 is fixed to the installation location via the intermediate fixing member 23. Therefore, by using the sub-fixing member 21 according to the first modification, the solar cell module 80 is more firmly fixed by using the sub-light-receiving surface side contact portion 21d in addition to the main light-receiving surface-side contact portion 20b. Is possible.

  In the first embodiment, the main light receiving surface side contact portion 20b and the sub light receiving surface side contact portion 21d are in contact with the top surface of the holding frame 10, but the main light receiving surface side contact portion 20b and The place where the sub light receiving surface side contact portion 21d abuts is not limited to the top surface of the holding frame 10, but may be a place where the sub light receiving surface side contact portion 21d abuts from the light receiving surface 70a side. Further, the sub-back side abutting portion 21b is in contact with the bottom surface of the holding frame 10, but the place where the sub-back side abutting portion 21b abuts is not limited to the bottom surface of the holding frame 10, and abuts from the back surface 70b side. Any place is acceptable.

  FIG. 11 is a perspective view showing a second modification of the auxiliary fixing member 21 in the first embodiment. FIG. 12 is a perspective view of a photovoltaic power generation system 100 using the auxiliary fixing member 21 according to the second modification. 13 is a partial cross-sectional view taken along line XIII-XIII shown in FIG. FIG. 14 is an enlarged perspective view of a portion where the solar cell module 80 is fixed using the sub-fixing member 21 according to the second modification, and shows a state where the solar cell module 80 is removed. In FIG. 13, the intermediate fixing member 23 and the main fixing member 20 are omitted.

  The sub-fixing member 21 according to the second modification is provided with a sub-light-receiving surface side contact portion 21d that protrudes in the direction indicated by the arrow Y as in the first modification and contacts the holding frame 10 from the light-receiving surface 70a side. Yes.

  In the second modification, the sub light receiving surface side contact portion 21d is in contact with the protruding portion 10a formed on the holding frame 10 from the light receiving surface 70a side. The overhanging portion 10 a projects outward from the solar cell panel 70 when viewed along the direction indicated by the arrow Y. In the second modification, the overhanging portion 10 a constitutes a part of the bottom surface of the holding frame 10. Therefore, the overhanging portion 10a also comes into contact with the sub-back side contact portion 21b.

  The sub light receiving surface side contact portion 21d is provided side by side on both sides along the direction indicated by the arrow X with respect to the main light receiving surface side contact portion 20b. When the sub-fixing member 21 according to Modification 2 is used, the holding frame 10 is sandwiched between the main light receiving surface side contact portion 20b and the sub light receiving surface side contact portion 21d and the sub back surface side contact portion 21b. Thus, the solar cell module 80 is fixed to the installation location via the intermediate fixing member 23. Therefore, by using the sub-fixing member 21 according to the modified example 2, the solar cell module 80 can be more firmly fixed by using the sub-light-receiving surface side contact portion 21d in addition to the main light-receiving surface-side contact portion 20b. Is possible. In addition, since the height of the sub-light-receiving surface side contact portion 21d can be suppressed as compared with the first modification, it is possible to reduce the weight by reducing the material used, improve the handleability, and suppress the manufacturing cost.

  FIG. 15 is a perspective view showing a third modification of the auxiliary fixing member 21 in the first embodiment. FIG. 16 is a perspective view of a photovoltaic power generation system 100 using the auxiliary fixing member 21 according to the third modification. 17 is a partial cross-sectional view taken along line XVII-XVII shown in FIG. FIG. 18 is an enlarged perspective view of a portion for fixing the solar cell module 80 using the sub-fixing member 21 according to the third modification, and shows a state in which the solar cell module 80 is removed.

  The auxiliary fixing member 21 according to the modified example 3 is provided with an auxiliary light receiving surface side contact portion 21d that protrudes in the direction indicated by the arrow Y and contacts the holding frame 10 from the light receiving surface 70a side as in the modified example 1. Yes.

  In the third modification, as in the second modification, the sub light receiving surface side contact portion 21d is in contact with the protruding portion 10a formed on the holding frame 10 from the light receiving surface 70a side. In the third modification, the overhanging portion 10 a constitutes a part of the bottom surface of the holding frame 10.

  In the third modification, the sub light receiving surface side contact portion 21d is provided side by side on the holding frame 10 side with respect to the main light receiving surface side contact portion 20b. Thereby, in this modification 3, the sub light-receiving surface side contact part 21d can be formed as one site | part made continuous in the direction shown by the arrow X. FIG. In this way, by forming the sub light receiving surface side contact portion 21d in one part, as compared with the case where a plurality of sub light receiving surface side contact portions 21d are formed as shown in the first and second modifications. Processing costs can be reduced.

  When the sub-fixing member 21 according to the third modification is used, the holding frame 10 is interposed between the main light receiving surface side contact portion 20b and the sub light receiving surface side contact portion 21d and the sub back surface side contact portion 21b. As a result, the solar cell module 80 is fixed to the installation location via the intermediate fixing member 23. Therefore, by using the auxiliary fixing member 21 according to the third modification, the solar cell module 80 is more firmly fixed by using the auxiliary light receiving surface side contact portion 21d in addition to the main light receiving surface side contact portion 20b. It becomes possible.

  FIG. 19 is a perspective view of a photovoltaic power generation system 100 using the auxiliary fixing member 21 according to the fourth modification. 20 is a partial cross-sectional view taken along line XX-XX shown in FIG.

  The sub-fixing member 21 according to the fourth modification is provided with a sub-light-receiving surface side contact portion 21d that protrudes in the direction indicated by the arrow Y as in the first modification and contacts the holding frame 10 from the light-receiving surface 70a side. ing.

  In the fourth modification, the sub light receiving surface side contact portion 21d is in contact with the protruding portion 10b formed on the holding frame 10 from the light receiving surface 70a side. The overhanging portion 10b projects outward from the solar cell panel 70 when viewed along the direction indicated by the arrow Y. In the fourth modification, the position where the overhang portion 10 b is formed is a height between the top surface and the bottom surface of the holding frame 10.

  The sub light receiving surface side contact portion 21d according to Modification 4 is provided side by side on both sides along the direction indicated by the arrow X with respect to the main light receiving surface side contact portion 20b. When the sub-fixing member 21 according to the fourth modification is used, the holding frame 10 is sandwiched between the main light receiving surface side contact portion 20b, the sub light receiving surface side contact portion 21d, and the sub back surface side contact portion 21b. As a result, the solar cell module 80 is fixed to the installation location via the intermediate fixing member 23. Therefore, by using the auxiliary fixing member 21 according to the fourth modification, the solar cell module 80 is more firmly fixed using the auxiliary light receiving surface side contact portion 21d in addition to the main light receiving surface side contact portion 20b. It becomes possible. In addition, since the height of the sub-light-receiving surface side contact portion 21d can be suppressed as compared with the first modification, it is possible to reduce the weight by reducing the material used, improve the handleability, and suppress the manufacturing cost.

  Next, the positional relationship between the holding frame 10 of the solar cell module 80 and the main fixing member 20 and the sub fixing member 21 that are fixing members will be described. FIG. 21 is a schematic diagram showing a positional relationship between the holding frame 10 and the fixing member in the first embodiment. As shown in FIG. 21, the sub-fixing member 21 has a length La that protrudes to the end side that is one side of the main fixing member 20 along the direction indicated by the arrow X, and the main fixing along the direction indicated by the arrow X. The length Lb which protrudes to the center line C side which is the other side of the member 20 is arranged differently. More specifically, length La> length Lb.

  Further, as shown in FIG. 21, since the main fixing member 20 is arranged close to the center line C side of the holding frame 10, the distance Lc from the main fixing member 20 to the end of the holding frame 10 is main. It is longer than the distance Ld from the fixing member 20 to the center line C. Therefore, the stress generated in the holding frame 10 is larger on the end portion side having a longer length. Since the auxiliary fixing member 21 protrudes greatly on the end portion where the generated stress is large, the side where the generated stress is large can be appropriately reinforced by the auxiliary fixing member 21.

  FIG. 22 is a schematic diagram illustrating another example of the positional relationship between the holding frame 10 and the fixing member in the first embodiment. FIG. 23 is a general bending moment diagram in a uniform load when the holding frame 10 according to Embodiment 1 is regarded as a support beam supported at two points. Two sets of fixing members are provided along the direction indicated by the arrow X.

  In order to eliminate the bias of stress generated between the end portion of the holding frame 10 and the sub-fixing member 21 and between the sub-fixing members 21, the maximum bending moment Mx needs to be the same. The maximum bending moment between the end of the holding frame 10 and the sub-fixing member 21 is Mx1, the maximum bending moment between the sub-fixing members 21 is Mx2, and the relationship between L1 and L2 is Mx1 = Mx2. When calculated, it becomes as follows, and L1: L2 = 1: 1 / √2.

That is,
^Mx1 = wL1 2/2
Mx2 = w (L2 ² −L1 ² ) / 2.
here,
If Mx1 = Mx2,
^{wL1 2/2 = w (L2} 2 -L1 2) / 2 , and the
L1 = L2 / √2 is derived.
Thereby, the relationship of 1: L2 = 1: 1 / √2 is obtained.
In addition,
Mx1: Maximum bending moment generated between the end of the holding frame 10 and the sub-fixing member 21 Mx2: Maximum bending moment generated between the sub-fixing members 21 w: Uniform load L1: L1 holding frame 10 and sub-fixing Distance L2 from the center of the member 21: Distance between the centers of the auxiliary fixing members 21.

  Accordingly, the ratio of the length from the end of the holding frame 10 to the center of the sub-fixing member 21 and the length between the centers of the sub-fixing members 21 is 1: 1 / (2√2). 10 can eliminate the unevenness of the stress generated at 10.

  The configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

  DESCRIPTION OF SYMBOLS 10 Holding frame, 10a, 10b Overhang | projection part, 20 Main fixing member, 20a Fixing part, 20b Main light-receiving surface side contact part, 21 Sub fixing member, 21a Base part, 21b Sub back surface side contact part, 21c, 24, 26 Hole, 21d Sub-light-receiving surface side contact portion, 22 Auxiliary fixing member, 22a Screw hole, 23 Intermediate fixing member, 23a Bottom surface, 23b Groove, 25 bolt, 60 Solar cell, 70 Solar cell panel, 70a Light-receiving surface, 70b Back surface , 80 solar cell module, 100 solar power generation system.

Claims (8)

A solar cell module having a solar cell panel including a photoelectric conversion unit that converts light incident on the light receiving surface into electric power, and a holding frame that holds an outer edge portion of the solar cell panel;
A main fixing member for fixing the solar cell module to an intermediate fixing member provided at an installation location;
A sub-fixing member sandwiched between the main fixing member and the intermediate fixing member,
The main fixing member has a fixing portion fixed to the intermediate fixing member, and a main light receiving surface side contact portion that extends from the fixing portion and contacts the holding frame from the light receiving surface side,
The sub-fixing member includes a base portion sandwiched between the fixing portion and the intermediate fixing member, and projects from the base portion to the solar cell module side to the holding frame from the back surface side opposite to the light receiving surface. A sub-back side abutting portion that abuts,
The sub-back side abutting portion has a length along a first direction, which is a direction in which the holding frame abuts on the sub-back side abutting portion, of the fixing portion along the first direction. rather than length than the length,
The sub-fixing member is provided with a sub-light-receiving surface side contact portion that protrudes in the second direction from the back surface toward the light-receiving surface and contacts the holding frame from the light-receiving surface side. Solar power generation system. The holding frame is provided with a projecting portion that projects outward from the solar cell panel when viewed along the second direction from the back surface toward the light receiving surface,
The solar power generation system according to claim 1 , wherein the sub light receiving surface side contact portion contacts the protruding portion from the light receiving surface side. The solar power generation system according to claim 2 , wherein the projecting portion is located at a height between the main light receiving surface side contact portion and the sub back surface side contact portion. The solar power generation system according to claim 2 , wherein the overhanging portion is in contact with the sub-back side contact portion. The said sub light-receiving surface side contact part is provided along with the said 1st direction with respect to the said main light-receiving surface side contact part, It is provided as described in any one of Claim 1 to 4 characterized by the above-mentioned. Solar power system. The solar power generation system according to claim 3 , wherein the sub light receiving surface side contact portion is provided side by side on the holding frame side with respect to the main light receiving surface side contact portion. The sub-back side contact portion has a length that protrudes from one side of the main fixing member along the first direction and a length that protrudes from the other side of the main fixing member along the first direction. The photovoltaic power generation system according to any one of claims 1 to 6 , wherein the photovoltaic power generation system is arranged. A fixing member for fixing a solar cell module having a solar cell panel including a photoelectric conversion unit that converts light incident on the light receiving surface into electric power, and a holding frame that holds an outer edge portion of the solar cell panel,
A main fixing member for fixing the solar cell module to an intermediate fixing member;
A sub-fixing member sandwiched between the main fixing member and the intermediate fixing member,
The main fixing member has a fixing portion fixed to the intermediate fixing member, and a main light receiving surface side contact portion that extends from the fixing portion and contacts the holding frame from the light receiving surface side,
The sub-fixing member includes a base portion sandwiched between the fixing portion and the intermediate fixing member, and projects from the base portion to the solar cell module side to the holding frame from the back surface side opposite to the light receiving surface. A sub-back side abutting portion that abuts,
The sub-back side abutting portion has a length along a first direction, which is a direction in which the holding frame abuts on the sub-back side abutting portion, of the fixing portion along the first direction. rather than length than the length,
The sub-fixing member is provided with a sub-light-receiving surface side contact portion that protrudes in the second direction from the back surface toward the light-receiving surface and contacts the holding frame from the light-receiving surface side. Fixing member to be used.

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