JP2014165387A - Solar cell module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solar cell module of which light-receiving surface of a solar cell can be tilted at a desired angle, even in the case of installation in a place of a different gradient.SOLUTION: A solar cell module A comprises: solar cells 5; cell mounting parts 4 mounted with the solar cells thereon; a case 1 housing the cell mounting parts therein; and support shafts 3 supporting the cell mounting parts in a turnable manner with respect to the case 1. In each of the cell mounting parts 4, a horizontal surface 41b is maintained horizontal by a weight 43, and a surface at a side opposite to a light-receiving surface 5a of the solar cell 5 is fixed on a fixing surface 41c. An angle formed between the horizontal surface 41b and the fixing surface 41c is set to a predetermined angle θ, thereby maintaining the state where the light-receiving surface 5a of the solar cell 5 is at the predetermined angle θ with respect to the horizontal plane.

Description

  The present invention relates to a solar cell module including solar cells that convert sunlight into electrical energy.

  Since the output of the solar battery cell depends on the amount of incident sunlight, it is desirable that the light receiving surface of the solar battery cell be as perpendicular to the incident light as possible. The direction of the sun varies with latitude, season, and time. In Japan, it is common to install a light-receiving surface of a solar cell module (solar cell panel) inclined about 30 ° with respect to the horizontal. In order to incline the solar cell module at a predetermined angle, a stand for installing the solar cell module is required. The mount is required to have sufficient strength to withstand strong winds and vibrations. The greater the inclination angle, the more susceptible to the influence of the wind, so the strength of the gantry needs to be increased, and the cost for the gantry increases.

  As a solar cell module that does not require a gantry, a solar cell module has been proposed in which solar cells are formed on a slope of a base having a sawtooth cross section (see Patent Document 1). If the inclination angle of the inclined surface is set to a predetermined angle, the light receiving surface of the solar battery cell can be inclined by a predetermined angle when the solar cell module is installed horizontally. Therefore, it is not necessary to incline the solar cell module using the gantry.

Japanese Patent No. 2881696

  However, in the case of the solar cell module described in Patent Document 1, the inclination angle of the inclined surface cannot be changed after manufacture, which causes a problem when the solar cell module cannot be installed horizontally. For example, when the inclination angle of the slope is 30 °, if it is installed as it is on a land having an inclination of 10 ° from north to south, the light receiving surface of the solar cell is inclined 20 ° (or 40 °). In this case, in order to set the inclination angle of the light receiving surface of the solar battery cell to 30 °, it is necessary to incline the solar battery module using a gantry. Even if the solar cell module is installed horizontally, it may be inclined due to ground subsidence or the like. In order to cope with this case, equipment for keeping the solar cell module horizontal is required.

  The present invention has been conceived under the circumstances described above, and provides a solar cell module capable of inclining the light receiving surface of a solar cell at a desired angle even when installed in a place where the inclination is different. Its purpose is to do.

  In order to solve the above problems, the present invention takes the following technical means.

  The solar cell module provided by the first aspect of the present invention includes a solar cell, a cell mounting means for mounting the solar cell, a case for storing the cell mounting means, and the cell mounting means. A support shaft that rotatably supports the case, and the cell mounting means maintains a state where a light receiving surface of the solar battery cell is at a predetermined angle with respect to the horizontal. To do.

  In a preferred embodiment of the present invention, the cell mounting means includes angle adjusting means having a horizontal plane that is maintained horizontally, and the light receiving surface of the solar battery cell and the horizontal plane are at the predetermined angle. It is fixed.

  In a preferred embodiment of the present invention, the angle adjusting means includes a horizontal plate having the horizontal plane and a fixed plate to which the solar battery cell is fixed, and the horizontal plate and the fixed plate form. The angle is the predetermined angle.

  In a preferred embodiment of the present invention, the angle adjusting means further includes angle changing means for changing the predetermined angle.

  In a preferred embodiment of the present invention, the angle changing means changes the predetermined angle in accordance with the south-central altitude of the sun.

  In a preferred embodiment of the present invention, the angle adjusting means includes a fixed surface to which the solar battery cell is fixed, and an angle formed by the horizontal surface and the fixed surface is the predetermined angle.

  In a preferred embodiment of the present invention, the cell mounting means further includes a weight fixed to the angle adjusting means for maintaining the horizontal surface of the angle adjusting means horizontal.

  In a preferred embodiment of the present invention, there is a fluid inside the case, and the cell mounting means floats on the fluid, so that the horizontal surface of the angle adjusting means is kept horizontal.

  According to the present invention, the cell mounting means on which the solar cells are mounted rotates with respect to the case so that the light receiving surface of the solar cells maintains a predetermined angle with respect to the horizontal. Therefore, even if the case is inclined at any angle, the light receiving surface of the solar battery cell can be inclined at a desired angle.

  Other features and advantages of the present invention will become more apparent from the detailed description given below with reference to the accompanying drawings.

It is a figure for demonstrating the solar cell module which concerns on 1st Embodiment. It is a figure for demonstrating the solar cell module which concerns on 1st Embodiment, and is the II-II sectional view taken on the line of FIG. It is a figure for demonstrating the solar cell module which concerns on 1st Embodiment, and is the III-III sectional view taken on the line of FIG. It is a figure for demonstrating the state which installed the solar cell module which concerns on 1st Embodiment on the slope. It is a figure for demonstrating the state which installed the solar cell module which concerns on 1st Embodiment in the wall surface. It is a figure for explaining other examples of a case and a lid concerning a 1st embodiment. It is a figure for demonstrating the other Example of the cell mounting part which concerns on 1st Embodiment. It is a figure for demonstrating the other Example of the cell mounting part which concerns on 1st Embodiment. It is a figure for demonstrating the other Example of the cell mounting part which concerns on 1st Embodiment. It is a figure for demonstrating the solar cell module which concerns on 2nd Embodiment. It is a figure for demonstrating the state which installed the solar cell module which concerns on 2nd Embodiment on the slope.

  Embodiments of the present invention will be specifically described below with reference to the drawings.

  1 to 3 are views for explaining the solar cell module according to the first embodiment. 1 is a plan view, FIG. 2 is a sectional view taken along line II-II in FIG. 1, and FIG. 3 is a sectional view taken along line III-III in FIG.

  The solar cell module A generates power by converting sunlight into electric energy. The solar cell module A includes a case 1, a lid 2, a support shaft 3, a cell mounting portion 4, and solar cells 5. In practice, the solar cell module A includes wiring for connecting the solar cells 5 and the like, but illustration thereof is omitted.

  The case 1 is a box made of metal such as aluminum and houses the cell mounting portion 4 therein. Note that the material of the case 1 is not limited as long as it can maintain a certain level of strength. Further, the shape of the case 1 is not limited. The lid 2 closes the opening of the case 1. Since the lid 2 needs to allow sunlight to pass through, for example, a transparent glass plate is used. In addition, the material of the lid | cover 2 is not limited, What is necessary is just to pass sunlight, such as a transparent plastic. The support shaft 3 supports the cell mounting portion 4 so as to be rotatable. The support shaft 3 is fixed to the case 1 in parallel with the open surface of the case 1. A plurality of support shafts 3 are provided so as to be parallel to each other at a predetermined interval. The support shaft 3 may be fixed to the cell mounting portion 4 and the support shaft 3 may be rotatable with respect to the case 1. In the following description, the axial direction of the support shaft 3 is the x-axis direction (see FIG. 1), the direction in which the support shafts 3 are arranged is the y-axis direction, and the direction of the open surface of the case 1 is the z-axis direction (see FIG. 2). .

  The cell mounting portion 4 mounts the solar battery cell 5 and is supported by the support shaft 3 to rotate. The cell mounting unit 4 includes an angle adjusting unit 41, a weight fixing unit 42, and a weight 43.

  The angle adjustment unit 41 is a plastic product having a substantially triangular prism shape. A through hole 41 a is formed in the axial direction of the angle adjusting portion 41 (substantially triangular prism axial direction). The support shaft 3 is inserted through the through-hole 41a, so that the cell mounting portion 4 is rotatable about the support shaft 3. A weight 43 is attached to a horizontal surface 41 b (see FIG. 3) among three side surfaces parallel to the axial direction of the angle adjusting unit 41 via a weight fixing unit 42. The weight 43 is arranged on a straight line extending from the position of the through hole 41a so as to be orthogonal to the horizontal plane 41b, and is configured such that the horizontal plane 41b is always horizontal. In the present embodiment, only one weight 43 is attached to the center of the angle adjustment unit 41 in the axial direction (see FIG. 2). The number of weights 43 to be attached is not limited. Moreover, the photovoltaic cell 5 is fixed to the fixed surface 41c (see FIG. 3) among the three side surfaces of the angle adjusting unit 41 on the surface opposite to the light receiving surface 5a. The angle formed by the horizontal surface 41b and the fixed surface 41c is a predetermined angle θ corresponding to the latitude of the area where the surface is used. For example, when used in Japan, θ = 30 °, but is not limited to this. In addition, the material of the angle adjustment part 41, the weight fixing | fixed part 42, and the weight 43 is not limited. Further, the shapes of the angle adjustment unit 41, the weight fixing unit 42, and the weight 43 are not limited. However, even when the cell mounting unit 4 rotates around the support shaft 3, the shape does not contact the case 1 or the lid 2. There is a need to.

  The solar battery cell 5 converts sunlight incident on the light receiving surface 5a into electric energy. The kind and structure of the photovoltaic cell 5 are not limited. The solar battery cell 5 is fixed to the fixed surface 41c of the angle adjusting unit 41 on the surface opposite to the light receiving surface 5a. A plurality of solar cells 5 are mounted on the cell mounting portion 4, and these solar cells 5 are connected in series. Moreover, the solar cells 5 connected in series mounted on each cell mounting portion 4 are connected in parallel. In addition, the connection method of each photovoltaic cell 5 is not limited to this. For example, all the solar battery cells 5 may be connected in series, or the solar battery cells 5 mounted on the plurality of cell mounting portions 4 may be connected in series, and those connected in series may be connected in parallel. . Further, the number of solar cells 5 mounted on the cell mounting unit 4 and the number of cell mounting units 4 provided on the solar cell module A are not limited. What is necessary is just to design suitably according to the electric power and voltage which the solar cell module A outputs. In addition, although this embodiment demonstrated the case where the plate-shaped photovoltaic cell 5 was fixed to the fixed surface 41c of the angle adjustment part 41, it is not restricted to this. The solar battery cell 5 may be configured by directly stacking an electrode or a semiconductor on the fixed surface 41 c of the angle adjustment unit 41.

  Next, a method for installing the solar cell module A will be described.

  In the solar cell module A, the positive direction of the Y axis (upward in the figure in FIG. 1) faces north, and the positive direction of the X axis (rightward in the figure in FIG. 1) faces east. Installed. As a result, the light receiving surface 5a of the solar battery cell 5 is directed in the negative direction of the Y axis (the left direction in the figure in FIG. 3), that is, toward the south, so that it is easy to receive sunlight. . As shown in FIG. 3, the light receiving surface 5a is inclined by a predetermined angle θ with respect to the horizontal. Therefore, the time during which the light receiving surface 5a can receive sunlight vertically becomes longer, and the power generation efficiency is improved. The solar cell module A need not be installed so that the case 1 is horizontal, and may be installed in a state where the case 1 is inclined with respect to the horizontal.

  FIG. 4 is a diagram for explaining a state in which the solar cell module A is installed on a slope. Each figure corresponds to FIG. 3.

  FIG. 5A shows a state in which the solar cell module A is installed on a slope inclined by an angle α in the north-south direction (the north side is high). As shown in the figure, the case 1 is inclined with respect to the horizontal by an angle α, but the horizontal surface 41 b is maintained horizontally by the weight 43. Since the angle formed between the horizontal surface 41b and the fixed surface 41c is a predetermined angle θ, the fixed surface 41c is inclined by an angle θ with respect to the horizontal. Therefore, the light receiving surface 5a of the solar battery cell 5 fixed to the fixed surface 41c is inclined by a predetermined angle θ with respect to the horizontal.

  FIG. 2B shows a state in which the solar cell module A is installed on a slope inclined by an angle β in the north-south direction (the south side is high). As shown in the figure, the case 1 is inclined with respect to the horizontal by an angle β, but the horizontal surface 41 b is kept horizontal by the weight 43. Therefore, as in the case of FIG. 5A, the light receiving surface 5a of the solar battery cell 5 is inclined by a predetermined angle θ with respect to the horizontal.

  FIG. 5C shows a state in which the solar cell module A is installed on a slope that is greatly inclined by an angle γ in the north-south direction (the north side is high). As shown in the figure, the case 1 is inclined with respect to the horizontal by an angle γ, but the horizontal surface 41 b is maintained horizontally by the weight 43. Therefore, as in the case of FIG. 5A, the light receiving surface 5a of the solar battery cell 5 is inclined by a predetermined angle θ with respect to the horizontal.

  Moreover, the solar cell module A can also be installed on a wall surface. FIG. 5 is a diagram for explaining a state in which the solar cell module A is installed on the wall surface. FIG. 5 corresponds to FIG.

  The figure shows a state in which the solar cell module A is installed on the wall surface. As shown in the figure, the bottom surface of the case 1 (the right side surface in FIG. 5) is fixed to the wall surface. Even in this case, the horizontal surface 41 b is maintained horizontally by the weight 43. Since the angle formed between the horizontal surface 41b and the fixed surface 41c is a predetermined angle θ, the fixed surface 41c is inclined by an angle θ with respect to the horizontal. Therefore, the light receiving surface 5a of the solar battery cell 5 fixed to the fixed surface 41c is inclined by a predetermined angle θ with respect to the horizontal.

  Note that the solar cell module A may be fixed directly to the installation surface, or an attachment member may be fixed to the installation surface, and the solar cell module A may be fixed to the attachment member. Further, a pedestal may be installed to be installed at a position slightly away from the installation surface, and fixed to the pedestal.

  In the present embodiment, the horizontal surface 41 b of the angle adjustment unit 41 is always kept horizontal by the weight 43. Since the angle formed between the horizontal surface 41b and the fixed surface 41c is a predetermined angle θ, the fixed surface 41c is always inclined by the angle θ with respect to the horizontal. Therefore, the light receiving surface 5a of the solar battery cell 5 fixed to the fixed surface 41c is always inclined by the angle θ with respect to the horizontal. Thereby, even if it installs in what kind of inclination place, the light-receiving surface 5a of the photovoltaic cell 5 can be made into the state inclined only angle (theta) with respect to the horizontal.

  Therefore, the solar cell module A can be directly or indirectly fixed to the installation surface without requiring a gantry for inclining, regardless of where the solar cell module A is installed. Moreover, even when using a pedestal for installation at a position slightly away from the installation surface, it is not necessary to install the solar cell module A at an angle. Therefore, since it is less susceptible to wind than when installed at an angle, the strength of the gantry to be prepared can be kept lower than before. Further, even when installing on a plurality of installation surfaces with different inclinations, it is not necessary to prepare different ones for each installation surface, and there is no need to adjust for each installation surface. Therefore, the efficiency of installation work is improved. In particular, when installing on an installation surface with a poor scaffold (for example, on the roof, etc.), adjustment during installation is unnecessary, thereby shortening the work time and increasing the safety of the installation work.

  Moreover, even if the ground subsidence occurs after the solar battery module A is installed and the installed ground is inclined, the angle formed by the light receiving surface 5a of the solar battery cell 5 with respect to the horizontal can be maintained.

  In addition, although this embodiment demonstrated the case where the opening part of the box-shaped case 1 was covered with the plate-shaped cover 2, it is not restricted to this. The opening of the box-shaped case 1 and the box-shaped lid 2 may be aligned with each other (see FIG. 6A), and the opening of the box-shaped lid 2 is replaced by a plate-like case 1. You may make it block (refer FIG.6 (b)). In these cases, since the portion shielded by the case 1 is reduced, the power generation efficiency is improved. In particular, light shielding by the case 1 is reduced in the solar battery cell 5 mounted on the cell mounting part 4 located at the end of the negative direction of the Y axis (left side direction in the figure). Moreover, you may make only two side surfaces (or side surface located in the negative direction of a Y-axis) transparent in the Y-axis direction among the cases 1 of the solar cell module A shown in FIG. Further, a space may be provided at the end of the case 1 in the negative direction of the Y axis to suppress the influence of light shielding by the case 1 (see FIG. 6C). 6A to 6C are diagrams corresponding to FIG.

  In this embodiment, although the case where the weight 43 was attached to the horizontal surface 41b of the angle adjustment part 41 via the weight fixing | fixed part 42 was demonstrated, it is not restricted to this. For example, a weight 43 ′ may be directly attached to the horizontal surface 41 b as in the cell mounting portion 4 shown in FIG. What is necessary is just to be comprised so that the horizontal surface 41b may always become horizontal. FIG. 7A shows a state in which the cell mounting portion 4 is viewed from the positive direction of the X axis, as in FIG. The same applies to FIGS. 7B, 7C, 8 and 9 below.

  In this embodiment, although the case where the angle adjustment part 41 is a substantially triangular prism shape was demonstrated, it is not restricted to this. For example, as in the cell mounting portion 4 shown in FIG. 7B, an angle adjusting portion 41 'having a V-shaped cross section obtained by joining two plates may be used. In this case, the angle formed by the two plates at the joint may be a predetermined angle θ. Further, like the cell mounting portion 4 shown in FIG. 7C, the horizontal plate 411 for attaching the weight 43 and the fixing plate 412 for fixing the solar battery cell 5 form a predetermined angle θ. What is fixed in this manner may be used in place of the angle adjustment unit 41. The fixed surface 41c should just be comprised so that the predetermined angle (theta) may always be maintained with respect to the horizontal surface 41b. The horizontal plate 411 and the solar battery cell 5 may be fixed so as to form a predetermined angle θ without providing the fixing plate 412.

  Further, since the fixed surface 41c only needs to be configured to always maintain the predetermined angle θ with respect to the horizontal, the angle adjusting unit 41 may not have the horizontal surface 41b. For example, as shown in FIG. 8, the angle adjustment unit 41 has a substantially quadrangular prism shape, and the fixed surface 41 c is always maintained at a predetermined angle θ with respect to the horizontal (indicated by a broken line in the figure). The weight 43 may be attached via the weight fixing part 42. That is, when the cell mounting portion 4 is viewed from the positive direction of the X axis (see FIG. 8), the angle formed by the straight line connecting the center G of the cell mounting portion 4 and the through hole 41a with the fixed surface 41c is (90 °). The position of the weight 43 may be adjusted so that −θ).

  FIG. 9 shows that the angle formed between the horizontal plate 411 and the fixed plate 412 can be changed in the cell mounting portion 4 shown in FIG. That is, the fixed portion between the horizontal plate 411 and the fixed plate 412 has a hinge structure, for example, and the movable portion 45 in which the guide portion 44 provided on the horizontal plate 411 is attached to the fixed plate 412 moves in the direction of the broken line arrow in the figure. The lock part 46 can be fixed. In this case, the angle formed by the horizontal plate 411 and the fixed plate 412 can be changed. Accordingly, when the predetermined angle θ is changed, such as when used in areas with different latitudes, the angle formed by the horizontal plate 411 and the fixed plate 412 is adjusted by fixing the position of the movable portion 45 in the guide portion 44. Can be changed to a predetermined angle θ. The method for changing the angle formed by the horizontal plate 411 and the fixed plate 412 is not limited.

  Furthermore, in the cell mounting part 4 shown in FIG. 9, the fixed position in the guide part 44 of the movable part 45 may be automatically changed according to the season or date. For example, a drive mechanism for moving the guide unit 44 is provided in the movable unit 45, and the position on the guide unit 44 (or the predetermined angle θ) corresponding to the season or date / time is read from the memory and moved to the corresponding position. The part 45 may be moved. By automatically changing the fixed position of the movable part 45 in accordance with the south-middle altitude of the sun, the predetermined angle θ is automatically changed so that the light receiving surface 5a of the solar battery cell 5 can receive sunlight as vertically as possible. If so, the power generation efficiency can be improved.

  In the first embodiment, the horizontal surface 41b is made horizontal by using the weight 43 (43 '), but is not limited thereto. For example, the horizontal surface 41b may be made horizontal by floating the angle adjusting unit 41 on a fluid such as insulating oil. This case will be described below as a second embodiment.

  FIG. 10 is a diagram for explaining the solar cell module according to the second embodiment, and corresponds to FIG. 3. In FIG. 10, the same code | symbol is attached | subjected to the same or similar element as the solar cell module A (refer FIG. 3) which concerns on 1st Embodiment.

  The solar cell module A ′ is a solar cell module according to the first embodiment in that the horizontal surface 41b is made horizontal by floating the angle adjusting part 41 in the insulating oil instead of making the horizontal surface 41b horizontal by the weight 43. Different from A.

  The case 1 ′ is provided with a wall in the X-axis direction on the inner side, and is divided into spaces for storing the cell mounting portions 4 ′. Insulating oil 6 is put in each space, and each cell mounting portion 4 ′ is floating above the insulating oil 6. Since the surface of the insulating oil 6 in each space is horizontal, the horizontal surface 41b of the angle adjusting unit 41 is also horizontal. Since the angle formed between the horizontal surface 41b and the fixed surface 41c is a predetermined angle θ, the fixed surface 41c is inclined by an angle θ with respect to the horizontal. Therefore, the light receiving surface 5a of the solar battery cell 5 fixed to the fixed surface 41c is inclined by a predetermined angle θ with respect to the horizontal. In addition, the fluid put into each space is not limited to the insulating oil 6, and may be other liquids, such as water, as long as the solar cell 5 and the connection line can be completely insulated. Moreover, it is not limited to a liquid, For example, fluids, such as fine sand and a plastic fine powder, may be sufficient. It is sufficient if the surface becomes horizontal when the case 1 'is tilted.

  FIG. 11 is a diagram for explaining a state in which the solar cell module A ′ is installed on the slope. Each figure corresponds to FIG. 3.

  FIG. 5A shows a state where the solar cell module A ′ is installed on a slope inclined by an angle α in the north-south direction (the north side is high). As shown in the figure, the case 1 ′ is inclined with respect to the horizontal by an angle α, but the horizontal surface 41 b is kept horizontal by the insulating oil 6. Therefore, the light receiving surface 5a of the solar battery cell 5 is inclined by a predetermined angle θ with respect to the horizontal.

  FIG. 5B shows a state in which the solar cell module A ′ is installed on a slope inclined by an angle β in the north-south direction (the south side is high). As shown in the figure, the case 1 ′ is inclined with respect to the horizontal by an angle β, but the horizontal surface 41 b is maintained horizontal by the insulating oil 6. Therefore, the light receiving surface 5a of the solar battery cell 5 is inclined by a predetermined angle θ with respect to the horizontal.

  In the second embodiment, similarly to the first embodiment, the light receiving surface 5a of the solar battery cell 5 is inclined at an angle θ with respect to the horizontal, regardless of the inclination. Can do. Therefore, the same effect as in the first embodiment can be obtained.

  The solar cell module according to the present invention is not limited to the above-described embodiment. The specific configuration of each part of the solar cell module according to the present invention can be varied in design in various ways.

A, A 'Solar cell module 1, 1' Case 2 Lid 3 Support shaft 4, 4 'Cell mounting part 41, 41' Angle adjustment part 41a Through hole 41b Horizontal surface 41c Fixed surface 411 Horizontal flat plate 412 Fixed plate 42 Weight fixed part 43 , 43 'Weight 44 Guide (angle changing means)
45 Movable part (angle changing means)
46 Locking part (angle changing means)
5 Solar cells 6 Insulating oil (fluid)

Claims (8)

Solar cells,
Cell mounting means on which the solar cells are mounted;
A case in which the cell mounting means is stored;
A support shaft that rotatably supports the cell mounting means with respect to the case;
With
The cell mounting means maintains a state where the light receiving surface of the solar battery cell is at a predetermined angle with respect to the horizontal,
A solar cell module characterized by that. The cell mounting means includes an angle adjusting means having a horizontal plane that is maintained horizontally,
The light receiving surface of the solar battery cell and the horizontal surface are fixed at the predetermined angle,
The solar cell module according to claim 1. The angle adjusting means includes a horizontal plate having the horizontal surface and a fixing plate to which the solar battery cell is fixed.
The angle formed by the horizontal plate and the fixed plate is the predetermined angle.
The solar cell module according to claim 2. The angle adjusting means further includes an angle changing means for changing the predetermined angle.
The solar cell module according to claim 3. The angle changing means changes the predetermined angle according to the south-middle altitude of the sun.
The solar cell module according to claim 4. The angle adjusting means includes a fixing surface to which the solar battery cell is fixed,
An angle formed by the horizontal plane and the fixed surface is the predetermined angle.
The solar cell module according to claim 2. The cell mounting means further includes a weight fixed to the angle adjusting means for maintaining the horizontal surface of the angle adjusting means horizontal.
The solar cell module according to any one of claims 2 to 6. There is a fluid inside the case,
When the cell mounting means floats on the fluid, the horizontal surface of the angle adjusting means is maintained horizontal.
The solar cell module according to any one of claims 2 to 6.

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