Patent Publication Number: US-2021194426-A1

Title: Method for manufacturing solar photovoltaic power generation apparatus, jig for manufacturing solar photovoltaic power generation apparatus, and apparatus for manufacturing solar photovoltaic power generation apparatus

Description:
TECHNICAL FIELD 
     The present disclosure relates to a method for manufacturing a solar photovoltaic power generation apparatus, a jig for manufacturing a solar photovoltaic power generation apparatus, and an apparatus for manufacturing a solar photovoltaic power generation apparatus. The present application claims priority based on Japanese Patent Application No. 2018-093581 filed on May 15, 2018. The entire contents of the description in the Japanese patent application are incorporated herein by reference. 
     BACKGROUND ART 
     Japanese Patent Laid-Open No. 2017-022838 discloses a concentrator photovoltaic apparatus. The concentrator photovoltaic apparatus employs a compound semiconductor element as a power generating element and causes a Fresnel lens to concentrate sunlight which is in turn caused to be incident on the power generating element to generate electric power. 
     CITATION LIST 
     Patent Literature 
     PTL 1: Japanese Patent Laid-Open No. 2017-022838 
     SUMMARY OF INVENTION 
     A method for manufacturing a solar photovoltaic power generation apparatus according to one aspect of the present disclosure comprises the following steps. A solar cell array is formed by attaching a plurality of solar cell modules to a fixing member extending in a longitudinal direction. The solar cell array is attached to a support arm. 
     A jig for manufacturing a solar photovoltaic power generation apparatus according to one aspect of the present disclosure is a solar photovoltaic power generation apparatus manufacturing jig for holding a solar cell array having a pair of fixing members extending in a longitudinal direction, the jig comprising a pair of attachment portions and a central region. The pair of attachment portions allows the pair of fixing members to be attached thereto. The central region is provided between the paired attachment portions. The central region has an insertion hole. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a schematic perspective view of a configuration of a solar photovoltaic power generation apparatus according to an embodiment of the present invention. 
         FIG. 2  is a schematic flowchart of a method for manufacturing the solar photovoltaic power generation apparatus according to the present embodiment. 
         FIG. 3  is a schematic front view showing a first step of the method for manufacturing the solar photovoltaic power generation apparatus according to the present embodiment. 
         FIG. 4  is a schematic plan view showing the first step of the method for manufacturing the solar photovoltaic power generation apparatus according to the present embodiment. 
         FIG. 5  is a schematic front view showing a second step of the method for manufacturing the solar photovoltaic power generation apparatus according to the present embodiment. 
         FIG. 6  is a schematic plan view showing the second step of the method for manufacturing the solar photovoltaic power generation apparatus according to the present embodiment. 
         FIG. 7  is a schematic cross section of a configuration of a rail of the solar photovoltaic power generation apparatus according to the present embodiment. 
         FIG. 8  is a schematic side view showing the second step of the method for manufacturing the solar photovoltaic power generation apparatus according to the present embodiment. 
         FIG. 9  is a schematic perspective view showing a configuration of a jig for manufacturing the solar photovoltaic power generation apparatus according to the present embodiment. 
         FIG. 10  is a schematic cross section taken along a line X-X of  FIG. 9 . 
         FIG. 11  is a schematic perspective view showing a state in which a jig for manufacturing the solar photovoltaic power generation apparatus is attached to the rail. 
         FIG. 12  is a schematic side view showing a third step of the method for manufacturing the solar photovoltaic power generation apparatus according to the present embodiment. 
         FIG. 13  is a schematic front view showing the third step of the method for manufacturing the solar photovoltaic power generation apparatus according to the present embodiment. 
         FIG. 14  is a schematic front view showing a configuration of a lift of an apparatus for manufacturing the solar photovoltaic power generation apparatus according to the present embodiment. 
         FIG. 15  is a schematic front view showing a fourth step of the method for manufacturing the solar photovoltaic power generation apparatus according to the present embodiment. 
         FIG. 16  is a schematic front view showing a fifth step of the method for manufacturing the solar photovoltaic power generation apparatus according to the present embodiment. 
         FIG. 17  is a schematic front view showing a sixth step of the method for manufacturing the solar photovoltaic power generation apparatus according to the present embodiment. 
         FIG. 18  is a schematic front view showing a seventh step of the method for manufacturing the solar photovoltaic power generation apparatus according to the present embodiment. 
         FIG. 19  is a schematic cross section of a configuration of a modified example of the rail of the solar photovoltaic power generation apparatus according to the present embodiment. 
     
    
    
     DETAILED DESCRIPTION 
     Problem to be Solved by the Present Disclosure 
     A concentrator photovoltaic apparatus is assembled generally in the following procedure: Initially, a rail for fixing a solar cell module is attached to a support arm of a tracking mount. In doing so, it is necessary to adjust a solar cell module attachment surface in level (or horizontality). For example, the solar cell module attachment surface is adjusted in level by inserting a level adjusting spacer between the support arm and the solar cell module fixing rail. 
     The solar cell module has a bottom portion attached to the solar cell module fixing rail. This requires a worker to be under the solar cell module and face upward in working to fix the solar cell module fixing rail to the solar cell module. In addition, the work to fix the solar cell module is conducted at a level around one meter above the ground. This results in poor workability in working to fix the solar cell module fixing rail to the solar cell module. 
     One aspect of the present disclosure has been made in order to solve the above-described problems, and an object of the present disclosure is to provide a method for manufacturing a solar photovoltaic power generation apparatus, a jig for manufacturing the solar photovoltaic power generation apparatus, and an apparatus for manufacturing the solar photovoltaic power generation apparatus, that can enhance productivity 
     Advantageous Effect of the Present Disclosure 
     According to one aspect of the present disclosure, there can be provided a method for manufacturing a solar photovoltaic power generation apparatus, a jig for manufacturing the solar photovoltaic power generation apparatus, and an apparatus for manufacturing the solar photovoltaic power generation apparatus, that can enhance productivity. 
     Overview of Embodiments of the Present Disclosure 
     Initially, an embodiment of the present disclosure will be outlined. 
     (1) A method for manufacturing a solar photovoltaic power generation apparatus  100  according to one aspect of the present disclosure includes the following steps. A solar cell array  1  is formed by attaching a plurality of solar cell modules  10  to a fixing member  20  extending in a longitudinal direction. Solar cell array  1  is attached to a support arm  2 . By previously preparing solar cell array  1  in a factory or the like in which an environment for installation is stable, a negative effect on efficiency of installation due to environment, weather, and the like can be minimized. As a result, the productivity of solar photovoltaic power generation apparatus  100  is improved. 
     (2) In the method for manufacturing solar photovoltaic power generation apparatus  100  according to item (1) above, the step of forming solar cell array  1  may include: disposing the plurality of solar cell modules  10  each with a bottom surface  11  facing upward; and disposing fixing member  20  on bottom surface  11 . This allows fixing member  20  to be fixed to each of the plurality of solar cell modules  10  in an operation performed from above the plurality of solar cell modules  10 . When this is compared with a fixing operation performed from below, the former allows the fixing operation to be done efficiently. Furthermore, when the fixing operation is performed from above, a fixed state can be easily inspected. This can improve solar photovoltaic power generation apparatus  100  in quality. 
     (3) According to the method for manufacturing solar photovoltaic power generation apparatus  100  according to item (2) above, in the step of disposing the plurality of solar cell modules  10  each with bottom surface  11  facing upward, the plurality of solar cell modules  10  may each be disposed on a workbench  30 . This allows the fixing operation to be done more efficiently. In addition, disposing the plurality of solar cell modules  10  on workbench  30  each with bottom surface  11  facing upward allows fixing member  20  to be attached to bottom surface  11  from above and hence efficiently. 
     (4) According to the method for manufacturing solar photovoltaic power generation apparatus  100  according to item (3) above, workbench  30  may have a flat working surface  31 . The plurality of solar cell modules  10  may each have a top surface  12  facing away from bottom surface  11 . Top surface  12  may be in contact with working surface  31 . The plurality of solar cell modules  10  can thus be each easily improved in horizontality. This can reduce the necessity of inserting a level adjusting spacer between each of the plurality of solar cell modules  10  and fixing member  20 . As a result, the productivity of solar photovoltaic power generation apparatus  100  can be improved. 
     (5) The method for manufacturing solar photovoltaic power generation apparatus  100  according to any one of items (1) to (4) above may further comprise: attaching a jig  50  to fixing member  20 ; inverting solar cell array  1  together with jig  50 ; and inserting a shaft  73  of a lifter  70  through an insertion hole  54  of jig  50 . In the step of inverting solar cell array  1  together with jig  50 , solar cell modules  10  may be inverted with shaft  73  serving as an axis of rotation. This allows heavy solar cell array  1  to be easily inverted. 
     (6) The method for manufacturing solar photovoltaic power generation apparatus  100  according to item (5) above may further comprise transporting solar cell array  1  while solar cell array  1  is supported by lifter  70 . This allows heavy solar cell array  1  to be easily transported. 
     (7) The method for manufacturing solar photovoltaic power generation apparatus  100  according to item (5) or (6) above may further comprise adjusting solar cell array  1  in level while solar cell array  1  is supported by lifter  70 . This allows heavy solar cell array  1  to be transported in a stable state. 
     (8) In the method for manufacturing solar photovoltaic power generation apparatus  100  according to item (7) above, the step of adjusting solar cell array  1  in level may precede the step of transporting solar cell array  1 . This allows solar cell array  1  to be adjusted in level suitably for transporting solar cell array  1 . 
     (9) According to the method for manufacturing solar photovoltaic power generation apparatus  100  according to item (8) above, solar cell array  1  may be lower in level in the step of transporting solar cell array  1  than in the step of inverting solar cell array  1 . Keeping solar cell array  1  low in level allows solar cell array  1  to be transported in a stable state. 
     (10) In the method for manufacturing solar photovoltaic power generation apparatus  100  according to any one of items (1) to (9) above, fixing member  20  may have a cross section in the form of a letter Z. Fixing member  20  can thus be enhanced in strength. As a result, flexing of fixing member  20  can be suppressed. The plurality of solar cell modules  10  can thus be each easily improved in horizontality. 
     (11) Jig  50  for manufacturing solar photovoltaic power generation apparatus  100  according to one aspect of the present disclosure is a solar photovoltaic power generation apparatus manufacturing jig for holding solar cell array  1  having a pair of fixing members  20  extending in a longitudinal direction, jig  50  comprising: a pair of attachment portions  52  and a central region  51 . The pair of attachment portions  52  allows the pair of fixing members  20  to be attached thereto. Central region  51  is provided between the paired attachment portions  52 . Central region  51  has insertion hole  54 . This allows solar cell array  1  to be easily inverted. As a result, the productivity of solar photovoltaic power generation apparatus  100  can be improved. 
     (12) In jig  50  for manufacturing solar photovoltaic power generation apparatus  100  according to item (11) above, central region  51  may be larger in thickness than each of the paired attachment portions  52 . Jig  50  for manufacturing solar photovoltaic power generation apparatus  100  can thus be enhanced in rigidity. 
     (13) In jig  50  for manufacturing solar photovoltaic power generation apparatus  100  according to item (11) or (12) above, the paired attachment portions  52  may each include a first surface  52   a  brought into contact with a respective one of the paired fixing members  20  and a second surface  52   b  facing away from first surface  52   a . Second surface  52   b  may have a protrusion  53  contiguous to central region  51 . Jig  50  for manufacturing solar photovoltaic power generation apparatus  100  can thus be further enhanced in rigidity. 
     (14) An apparatus for manufacturing solar photovoltaic power generation apparatus  100  according to an aspect of the present disclosure comprises jig  50  for manufacturing solar photovoltaic power generation apparatus  100  according to any one of items (11) to (13) above, and lifter  70  having shaft  73  that can be inserted through insertion hole  54 . Lifter  70  has a tire  75 . When lifter  70  is a typical lifter, a caster made of metal is used therefor. When lifter  70  with a caster made of metal moves on an unpaved ground surface such as desert, the caster catches sand and cannot move smoothly. When tire  75  is used instead of the caster, lifter  70  can be moved easily even on an unpaved ground surface such as desert. 
     DETAILED DESCRIPTION OF EMBODIMENTS OF THE PRESENT DISCLOSURE 
     Hereinafter, an embodiment of the present disclosure will more specifically be described with reference to the drawings. In the figures, identical or equivalent components are identically denoted and will not be described repeatedly. 
     (Solar Photovoltaic Power Generation Apparatus) 
     Initially, a configuration of a solar photovoltaic power generation apparatus  100  according to an embodiment will be described. 
     As shown in  FIG. 1 , solar photovoltaic power generation apparatus  100  according to the present embodiment is a concentrator photovoltaic power generation apparatus, and mainly includes a pole  3 , a rotary shaft  4 , a solar cell array  1 , a support arm  2 , a drive  5 , and a fastener  6 . Solar cell array  1  includes a plurality of solar cell modules  10  and a pair of rails  20  (a pair of fixing members  20  extending in a longitudinal direction). While the number of solar cell modules  10  included in a single solar cell array  1  is not particularly limited, eight solar cell modules  10  are included therein for example. Solar cell modules  10  are disposed in a direction parallel to rotary shaft  4 . The pair of rails  20  extends in a direction parallel to a direction in which rotary shaft  4  extends. The pair of rails  20  is attached to a bottom surface  11  of each of the plurality of solar cell modules  10 . A plurality of solar cell arrays  1  constitute a solar cell array assembly  9 . 
     Support arm  2  is a support for supporting the plurality of solar cell arrays  1 . Support arm  2  is attached to rotary shaft  4  by fastener  6 . Support arm  2  extends in a direction intersecting the direction in which rotary shaft  4  extends. Although the number of support arms  2  is not particularly limited, it is for example six support arms. For example, three support arms  2  are provided for solar cell array assembly  9  disposed on one side of pole  3 , and three support arms  2  are provided for solar cell array assembly  9  disposed on the other side of pole  3 . The three support arms  2  may each have an end provided with a connector  7  extending in a direction parallel to the direction in which rotary shaft  4  extends. 
     Solar cell array assembly  9  is configured to be rotatable about two axes. Specifically, solar cell array assembly  9  is configured to be rotatable about a first axis of rotation A extending along a direction in which pole  3  extends. When solar cell array assembly  9  rotates about first axis of rotation A, solar cell array assembly  9  rotates in a direction of azimuth angle. Solar cell array assembly  9  is also configured to be rotatable about a second axis of rotation B extending along the direction in which rotary shaft  4  extends. When solar cell array assembly  9  rotates about second axis of rotation B, solar cell array assembly  9  rotates in a direction of elevation angle. Thus, solar cell array assembly  9  can track the movement of the sun and move accordingly. Specifically, solar cell array assembly  9  is movable according to the movement of the sun to maintain an angle to face the sun. 
     (Method for Manufacturing Solar Photovoltaic Power Generation Apparatus) 
     Subsequently, a method for manufacturing solar photovoltaic power generation apparatus  100  according to the present embodiment will be described. 
     As shown in  FIG. 2 , the method for manufacturing solar photovoltaic power generation apparatus  100  according to the present embodiment mainly comprises: forming a solar cell array (S 10 ), inverting the solar cell array (S 20 ), and attaching the solar cell array to a support arm (S 30 ). 
     Initially, the step of forming solar cell array  1  (S 10 ) is performed. Specifically, a plurality of solar cell modules  10  are each disposed on a workbench  30 . Workbench  30  has a height of approximately 0.7 m or more and 1.0 m or less, for example. This allows a standing worker to work efficiently. As shown in  FIG. 3 , workbench  30  mainly includes a top plate  32  and a support  33 . Support  33  supports top plate  32 . Top plate  32  has a flat working surface  31 . The plurality of solar cell modules  10  each have a top surface  12 , a bottom surface  11 , and a side surface  13 . On top surface  12 , for example, a concentrator solar cell module (not shown) is disposed. The concentrator solar cell module includes, for example, a Fresnel lens (not shown). Bottom surface  11  is a surface facing away from top surface  12 . On bottom surface  11 , for example, a power generating element (not shown) is disposed. 
     As shown in  FIG. 3 , the plurality of solar cell modules  10  are each disposed with bottom surface  11  facing upward Z. “Upward” means a direction within ±1° with respect to a vertically upward direction. In other words, the plurality of solar cell modules  10  are each disposed to have top surface  12  facing working surface  31 . In other words, the plurality of solar cell modules  10  are disposed to each have top surface  12  facing downward. “Downward” means a direction within ±1° with respect to a vertically downward direction. The plurality of solar cell modules  10  may each have top surface  12  in contact with working surface  31 . While the number of solar cell modules  10  is not particularly limited, it is for example eight solar cell modules. 
     As shown in  FIG. 4 , the plurality of solar cell modules  10  are each generally in the form of a rectangle in plan view (as observed in the vertical direction). The plurality of solar cell modules  10  each have a shorter side extending in a first direction X and a longer side extending in a second direction Y. Second direction Y is perpendicular to first direction X. As shown in  FIG. 4 , the plurality of solar cell modules  10  are each disposed in first direction X. In other words, the plurality of solar cell modules  10  are each disposed in the direction of the shorter side of solar cell module  10 . Any two adjacent solar cell modules  10  may be in contact with each other. 
     As shown in  FIG. 4 , working surface  31  extends in each of first direction X and second direction Y. In a plan view, working surface  31  is, for example, rectangular. First direction X is a longitudinal direction of working surface  31 . The plurality of solar cell modules  10  are each disposed in the longitudinal direction of working surface  31 . Top plate  32  is desirably a single monolithic plate. Specifically, top plate  32  is desirably made of solid wood. This allows working surface  31  to be flatter than when two workbenches  30  are disposed side by side. 
     Subsequently, rail  20  is attached to the plurality of solar cell modules  10 . As shown in  FIGS. 5 and 6 , rail  20  is disposed on bottom surface  11  of each of the plurality of solar cell modules  10 . Rail  20  has a rail  21  on one side and a rail  22  on the other side. Rail  21  on one side and rail  22  on the other side each have a longitudinal direction in first direction X. In other words, rail  21  on one side and rail  22  on the other side are each disposed in the direction of the shorter side of solar cell module  10 . The direction in which rail  21  on one side extends is parallel to the direction in which rail  22  on the other side extends. 
     For example, eight solar cell modules  10  may first be disposed on working surface  31  and rails  20  may subsequently be attached to the eight solar cell modules  10 , or two solar cell modules  10  on opposite sides may first be disposed on working surface  31  and rails  20  may subsequently be attached to the two solar cell modules  10  on the opposite sides, and thereafter, the remaining six solar cell modules  10  may be attached to rails  20 . Attaching through such a procedure can reduce misalignment of the plurality of solar cell modules  10 . A truss (not shown) may be used to connect rail  21  on one side and rail  22  on the other side. 
     As shown in  FIG. 7 , rail  20  has a cross section in the form of a letter Z for example. Specifically, rail  20  includes a first rail portion  61 , a second rail portion  62 , and a third rail portion  63 . First rail portion  61  is contiguous to one side end of second rail portion  62 . Third rail portion  63  is contiguous to the other side end of second rail portion  62 . Second rail portion  62  is located between first rail portion  61  and third rail portion  63 . As observed at second rail portion  62 , first rail portion  61  projects on one side, and third rail portion  63  projects on the other side. In other words, as observed at second rail portion  62 , first rail portion  61  projects on a side opposite to that on which third rail portion  63  projects. 
     As shown in  FIG. 7 , in a cross section, first rail portion  61  extends to be substantially perpendicular to second rail portion  62 . Similarly, third rail portion  63  extends to be substantially perpendicular to second rail portion  62 . In a cross section, an angle θ 1  formed by first rail portion  61  and second rail portion  62  may be less than 90° or may be 90° or larger. In a cross section, an angle θ 2  formed by second rail portion  62  and third rail portion  63  may be less than 90° or may be 90° or larger. First rail portion  61  may be provided with a first through hole  64 . Similarly, third rail portion  63  may be provided with a second through hole  65 . First through hole  64  and second through hole  65  each receive a bolt or a rivet, as will described hereinafter. 
     Subsequently, rail  20  is attached to each of the plurality of solar cell modules  10  with a fixing part  40 . Fixing part  40  includes, for example, a first fixing member  41  and a second fixing member  42 . While fixing part  40  is not particularly limited as long as it can fix rail  20  to each of the plurality of solar cell modules  10 , it is for example a bolt or a rivet. As shown in  FIG. 8 , rail  21  on one side is disposed on bottom surface  11  of each of the plurality of solar cell modules  10  at an end on one side in second direction Y. Rail  21  on one side is fixed to bottom surface  11  of each of the plurality of solar cell modules  10  with first fixing member  41 . Rail  22  on the other side is disposed on bottom surface  11  of each of the plurality of solar cell modules  10  at an end on the other side in second direction Y. Rail  22  on the other side is fixed to bottom surface  11  of each of the plurality of solar cell modules  10  with second fixing member  42 . Solar cell array  1  is thus formed (see  FIG. 8 ). Solar cell array  1  has a weight for example of 100 kg. 
     Hereinafter, a jig  50  for manufacturing solar photovoltaic power generation apparatus  100  according to the present embodiment will be described. Jig  50  for manufacturing solar photovoltaic power generation apparatus  100  according to the present embodiment is a solar photovoltaic power generation apparatus manufacturing jig for holding solar cell array  1  having the pair of fixing members  20 . As shown in  FIG. 9 , jig  50  for manufacturing solar photovoltaic power generation apparatus  100  according to the present embodiment has a pair of rail attachment portions  52  (a pair of attachment portions  52 ) and a central region  51 . The pair of rail attachment portions  52  is a portion to which the pair of rails  20  is attached. Central region  51  is provided between the paired rail attachment portions  52 . That is, central region  51  is sandwiched by the paired rail attachment portions  52 . Central region  51  has an insertion hole  54 . Insertion hole  54  has a round cross section. While Jig  50  is not particularly limited in material, it is for example aluminum or stainless steel. 
       FIG. 10  is a schematic cross section taken along a line X-X of  FIG. 9 . As shown in  FIG. 10 , a thickness T 1  of central region  51  is larger than a thickness T 2  of each of the paired rail attachment portions  52 . The paired rail attachment portions  52  each have a first surface  52   a  and a second surface  52   b . First surface  52   a  is brought into contact with the pair of rails  20 . Second surface  52   b  is a surface facing away from first surface  52   a . First surface  52   a  is provided with an attachment hole  55 . Although the number of attachment holes  55  is not particularly limited, it is for example four attachment holes. Two attachment holes  55  are provided in each of the paired rail attachment portions  52 . Second surface  52   b  is provided with a protrusion  53 . Protrusion  53  is contiguous to central region  51 . 
     Subsequently, the step of attaching jig  50  to rail  20  is performed. Initially, jig  50  is disposed on rail  20 . As shown in  FIG. 11 , jig  50  is disposed in contact with first rail portion  61  of rail  20 . Rail  20  is in contact with the pair of rail attachment portions  52  of jig  50 . As shown in  FIG. 12 , a portion of central region  51  is located between the paired rails  20 . Central region  51  is spaced from solar cell module  10 . The paired rail attachment portions  52  each have first surface  52   a  facing bottom surface  11  of solar cell module  10 . For example, jig  50  is fixed to rail  20  with a fixing part  90  such as a bolt or a rivet. Fixing part  90  includes, for example, a third fixing member  91  and a fourth fixing member  92 . Rail  21  on one side is attached to one of the paired rail attachment portions  52  with third fixing member  91 . Rail  22  on the other side is attached to the other of the paired rail attachment portions  52  with fourth fixing member  92 . 
     As shown in  FIG. 13 , jig  50  is attached to the opposite ends of rail  20 . Specifically, jig  50  is attached to one end of rail  20  in first direction X and the other end of rail  20  in first direction X. The pair of jigs  50  are opposite to each other. 
     A configuration of an apparatus for manufacturing the solar photovoltaic power generation apparatus according to the present embodiment will now be described. An apparatus  80  for manufacturing solar photovoltaic power generation apparatus  100  according to the present embodiment comprises a lifter  70  and jig  50 . As shown in  FIG. 14 , lifter  70  mainly includes a support  71 , a movable part  72 , a shaft  73 , a pedestal  74 , and a tire  75 . Movable part  72  is attached to support  71 . Movable part  72  can move in the vertical direction. Shaft  73  is attached to movable part  72 . Shaft  73  can move in the vertical direction together with movable part  72 . Shaft  73  can be inserted into insertion hole  54  of jig  50 . Support  71  is attached to pedestal  74 . Tire  75  is attached to pedestal  74 . Tire  75  is made of rubber. While the number of tires  75  is not particularly limited, it is for example two tires frontward and two tires rearward (four tires in total). 
     As shown in  FIG. 15 , two lifters  70  are prepared. One lifter  70  is disposed on one end side of rail  20 . The other lifter  70  is disposed on the other end side of rail  20 . The two lifters  70  each have shaft  73  inserted into insertion hole  54  of jig  50  associated therewith. Subsequently, shaft  73  moves upward. Thus, solar cell array  1  is lifted up by lifter  70 . In other words, the plurality of solar cell modules  10  are spaced from working surface  31  of workbench  30 . 
     Subsequently, the step of inverting the solar cell array (S 20 ) is performed. Specifically, solar cell array  1  is inverted together with jig  50 . Solar cell array  1  is inverted with shaft  73  serving as an axis of rotation. Solar cell array  1  is rotated by about 180°. It may be rotated in a direction R (see  FIG. 11 ) clockwise or counterclockwise. A worker may exert force to solar cell array  1  to rotate and thus invert solar cell array  1 . The plurality of solar cell modules  10  thus each have top surface  12  facing upward Z and bottom surface  11  facing downward (see  FIG. 16 ). 
     Subsequently, the step of transporting solar cell array  1  is performed. Specifically, solar cell array  1  is transported while solar cell array  1  is supported by lifter  70 . Solar cell array  1  may be adjusted in level before it is transported. Specifically, solar cell array  1  is adjusted in level while solar cell array  1  is supported by lifter  70 . Solar cell array  1  is adjusted in level by changing shaft  73  in level by movable part  72 . As shown in  FIG. 17 , in the step of transporting solar cell array  1 , solar cell array  1  may be lower in level than in the step of inverting solar cell array  1 . Keeping solar cell array  1  low in level allows solar cell array  1  to be transported in a stable state. 
     Subsequently, the step of attaching the solar cell array to the support arm (S 30 ) is performed. As shown in  FIG. 18 , support arm  2  has a cross section for example in the form of a letter H or I. Support arm  2  has a web  81  and a pair of flanges  82 . The pair of flanges  82  has one flange attached to one end of web  81 . The pair of flanges  82  has the other flange attached to the other end of web  81 . 
     As shown in  FIG. 18 , solar cell array  1  is disposed in contact with one of the paired flanges  82  of support arm  2 . Support arm  2  extends in a direction orthogonal to that in which rail  20  of solar cell array  1  extends. Rail  20  of solar cell array  1  is attached to one of the paired flanges  82  of support arm  2 . 
     Hereinafter, a configuration of a modified example of rail  20  will be described. As shown in  FIG. 19 , rail  20  may have a cross section in the form of a letter L for example. Specifically, rail  20  has a fourth rail portion  66  and a fifth rail portion  67 . Fourth rail portion  66  is contiguous to fifth rail portion  67 . In a cross section, an angle θ 3  formed by fourth rail portion  66  and fifth rail portion  67  may be 90° or more, for example. Fourth rail portion  66  may be provided with a third through hole  68 . Third through hole  68  receives a bolt or a rivet. Rail  20  may be attached to solar cell module  10  such that fourth rail portion  66  is brought into contact with bottom surface  11  of solar cell module  10  and fifth rail portion  67  is brought into contact with side surface  13  of solar cell module  10 . 
     Solar photovoltaic power generation apparatus  100  according to the present embodiment has a function and effect, as described below: In solar photovoltaic power generation apparatus  100  according to the present embodiment, solar cell array  1  is formed by attaching a plurality of solar cell modules  10  to fixing member  20 . Solar cell array  1  is attached to support arm  2 . By previously preparing solar cell array  1  in a factory or the like in which an environment for installation is stable, a negative effect on efficiency of installation due to environment, weather, and the like can be minimized. As a result, the productivity of solar photovoltaic power generation apparatus  100  is improved. 
     Furthermore, in solar photovoltaic power generation apparatus  100  according to the present embodiment, the step of forming solar cell array  1  includes: disposing the plurality of solar cell modules  10  each with bottom surface  11  facing upward Z; and disposing fixing member  20  on bottom surface  11 . This allows fixing member  20  to be fixed to each of the plurality of solar cell modules  10  in an operation performed from above the plurality of solar cell modules  10 . When this is compared with a fixing operation performed from below, the former allows the fixing operation to be done efficiently. Furthermore, when the fixing operation is performed from above, a fixed state can be easily inspected. This can improve solar photovoltaic power generation apparatus  100  in quality. 
     Furthermore, according to solar photovoltaic power generation apparatus  100  of the present embodiment, in the step of disposing the plurality of solar cell modules  10  each with bottom surface  11  facing upward, the plurality of solar cell modules  10  are each disposed on workbench  30 . This allows the fixing operation to be done more efficiently. In addition, disposing the plurality of solar cell modules  10  on workbench  30  each with bottom surface  11  facing upward allows fixing member  20  to be attached to bottom surface  11  from above and hence efficiently. 
     Furthermore, according to solar photovoltaic power generation apparatus  100  of the present embodiment, workbench  30  has a flat working surface  31 . Top surface  12  facing away from bottom surface  11  is in contact with working surface  31 . The plurality of solar cell modules  10  can thus be each easily improved in horizontality. This can reduce the necessity of inserting a level adjusting spacer between each of the plurality of solar cell modules  10  and fixing member  20 . As a result, the productivity of solar photovoltaic power generation apparatus  100  can be improved. 
     Furthermore, according to solar photovoltaic power generation apparatus  100  according to the present embodiment, attaching jig  50  to fixing member  20 , inverting solar cell array  1  together with jig  50 , and shaft  73  of lifter  70  is inserted through insertion hole  54  of jig  50 . In the step of inverting solar cell array  1  together with jig  50 , solar cell modules  10  are inverted with shaft  73  serving as an axis of rotation. This allows heavy solar cell array  1  to be easily inverted. 
     Furthermore, solar photovoltaic power generation apparatus  100  according to the present embodiment further comprises transporting solar cell array  1  while solar cell array  1  is supported by lifter  70 . This allows heavy solar cell array  1  to be easily transported. 
     Furthermore, solar photovoltaic power generation apparatus  100  according to the present embodiment further comprises adjusting solar cell array  1  in level while solar cell array  1  is supported by lifter  70 . This allows heavy solar cell array  1  to be transported in a stable state. 
     Furthermore, in solar photovoltaic power generation apparatus  100  according to the present embodiment, fixing member  20  has a cross section in the form of a letter Z. Fixing member  20  can thus be enhanced in strength. As a result, flexing of fixing member  20  can be suppressed. Accordingly, the plurality of solar cell modules  10  can each be easily improved in horizontality. 
     Jig  50  for manufacturing solar photovoltaic power generation apparatus  100  according to the present embodiment is a solar photovoltaic power generation apparatus manufacturing jig for holding solar cell array  1  having a pair of fixing members  20 , jig  50  comprising: a pair of attachment portions  52  and a central region  51 . The pair of attachment portions  52  allows the pair of fixing members  20  to be attached thereto. Central region  51  is provided between the paired attachment portions  52 . Central region  51  has insertion hole  54 . This allows solar cell array  1  to be easily inverted. As a result, the productivity of solar photovoltaic power generation apparatus  100  can be improved. 
     Furthermore, in jig  50  for manufacturing solar photovoltaic power generation apparatus  100  according to the present embodiment, central region  51  is larger in thickness than each of the paired attachment portions  52 . Jig  50  for manufacturing solar photovoltaic power generation apparatus  100  can thus be enhanced in rigidity. 
     Furthermore, in jig  50  for manufacturing solar photovoltaic power generation apparatus  100  according to the present embodiment, the paired attachment portions  52  each include first surface  52   a  brought into contact with a respective one of the paired fixing members  20  and second surface  52   b  facing away from first surface  52   a . Second surface  52   b  has protrusion  53  contiguous to central region  51 . Jig  50  for manufacturing solar photovoltaic power generation apparatus  100  can thus be further enhanced in rigidity. 
     The apparatus for manufacturing solar photovoltaic power generation apparatus  100  according to the present embodiment comprises jig  50  for manufacturing solar photovoltaic power generation apparatus  100 , and lifter  70  having shaft  73  that can be inserted through insertion hole  54 . Lifter  70  has tire  75 . When lifter  70  is a typical lifter, a caster made of metal is used therefor. When lifter  70  with a caster made of metal moves on an unpaved ground surface such as desert, the caster catches sand and cannot move smoothly. When tire  75  is used instead of the caster, lifter  70  can be moved easily even on an unpaved ground surface such as desert. 
     It should be understood that the embodiments disclosed herein have been described for the purpose of illustration only and in a non-restrictive manner in any respect. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to encompass any modifications within the meaning and scope equivalent to the terms of the claims. 
     REFERENCE SIGNS LIST 
       1  solar cell array,  2  support arm,  3  pole,  4  rotary shaft,  5  drive,  6  fastener,  7  connector,  9  solar cell array assembly,  10  solar cell module,  11  bottom surface,  12  top surface,  13  side surface,  20  rail (fixing member),  21  rail on one side,  22  rail on the other side,  30  workbench,  31  working surface,  32  top plate,  33 ,  71  support,  40 ,  90  fixing part,  41  first fixing member,  42  second fixing member,  50  jig (manufacturing jig),  51  central region,  52  rail attachment portion (attachment portion),  52   a  first surface,  52   b  second surface,  53  protrusion,  54  insertion hole,  55  attachment hole,  61  first rail portion,  62  second rail portion,  63  third rail portion,  64  first through hole,  65  second through hole,  66  fourth rail portion,  67  fifth rail portion,  68  third through hole,  70  lifter,  72  movable part,  73  shaft,  74  pedestal,  75  tire,  80  manufacturing apparatus,  81  web,  82  flange,  91  third fixing member,  92  fourth fixing member,  100  solar photovoltaic power generation apparatus, A first axis of rotation, B second axis of rotation, T 1 , T 2  thickness, X first direction, Y second direction, Z top.