JP5153279B2 - Solar cell module - Google Patents

Description

  The present invention relates to a solar cell module in which a first solar cell unit and a second solar cell unit arranged in a straight line along an arrangement direction between a light receiving surface side protective material and a back surface side protective material. .

  Solar cells are expected as new energy sources because they directly convert clean and inexhaustible sunlight into electricity.

  Generally, since the output per solar cell is about several watts, a solar cell module whose output is increased by connecting a plurality of solar cells is used as a power source.

  The solar cell module includes a plurality of solar cell units arranged in a straight line along the arrangement direction. The solar cell units are electrically connected in series by a wiring material. The solar cell unit has a plurality of solar cells arranged in a straight line along the arrangement direction. The solar cells are electrically connected in series or in parallel by a wiring material. Thereby, the voltage of the whole solar cell module is adjusted suitably.

  Here, a solar cell module including a solar cell unit formed using solar cells electrically connected in parallel is known. (See Patent Document 1). Each solar cell has a light receiving surface side electrode formed along the arrangement direction on the light receiving surface and a back surface side electrode formed along the arrangement direction on the back surface. The light receiving surface side electrode and the back surface side electrode do not overlap on a projection surface parallel to the light receiving surface.

  In each solar cell unit, the light receiving surface side electrodes are connected to each other by soldering a straight wiring material. The backside electrodes are connected by soldering a straight wiring material. Thereby, in each solar cell unit, solar cells are electrically connected in parallel.

According to this, on the projection plane parallel to the light receiving surface, the light receiving surface side wiring material and the back surface side wiring material do not overlap. Therefore, when soldering the light-receiving surface side wiring material and the back surface side wiring material, it is possible to suppress the solder that has melted from one wiring material from coming into contact with the other wiring material. As a result, it is possible to suppress the occurrence of a short circuit between the light receiving surface side wiring material and the back surface side wiring material.
JP 2007-103535 A

  However, it is not easy to electrically connect the above solar cell units in series. Specifically, the light receiving surface side wiring member of one solar cell unit and the back surface side wiring member of another solar cell unit are not arranged on a straight line along the arrangement direction. Therefore, it is necessary to connect the light-receiving surface side wiring material and the back surface side wiring material using another wiring material.

  Thus, in order to electrically connect the above-described solar cell units in series, an operation of complicatedly soldering a large number of components is required. As a result, there has been a problem that the manufacturing cost of the solar cell module increases.

  Therefore, the present invention has been made in view of the above problems, and provides a solar cell module capable of easily connecting solar cell units in which a plurality of solar cells are electrically connected in parallel. For the purpose.

  The solar cell module according to the feature of the present invention includes a first solar cell unit and a second solar cell unit arranged in a straight line along the arrangement direction between the light receiving surface side protective material and the back surface side protective material. A sealed solar cell module, wherein the first solar cell unit includes a plurality of first solar cells, the second solar cell unit includes a plurality of second solar cells, and the plurality of first solar cells and the plurality of first solar cells. The second solar cells are arranged in a straight line along the arrangement direction, and the first solar cell is a first light receiving surface on which light is incident and a first light receiving surface provided on the opposite side of the first light receiving surface. A back surface, a first light receiving surface side electrode formed along the arrangement direction on the first light receiving surface, and a first back surface side electrode formed along the arrangement direction on the first back surface; The second solar cell has a second light receiving surface on which light is incident and an opposite side of the second light receiving surface. The second back surface electrode formed along the arrangement direction on the second back surface, the second light receiving surface, and the second back surface side electrode formed along the arrangement direction on the second back surface. The first back surface side electrodes are electrically connected by the first wiring material, and the second light receiving surface side electrodes are electrically connected by the second wiring material, The light receiving surface side electrode and the second back surface side electrode are provided in a straight line along the arrangement direction, and the first light receiving surface side electrode and the second back surface side electrode are electrically connected by the third wiring member. The third wiring material does not overlap the first wiring material and the second wiring material on the projection plane parallel to the first light receiving surface.

  Therefore, the first solar cell unit and the second solar cell unit can be electrically connected in series by the straight third wiring member. That is, in the step of connecting the solar cell units, only the straight third wiring material may be soldered to the bus bar electrode. Therefore, it is possible to reduce the work of complicatedly soldering a large number of components. As a result, the manufacturing cost of the solar cell module can be reduced.

  ADVANTAGE OF THE INVENTION According to this invention, the solar cell module which can perform the connection of the solar cell units in which the several solar cell was electrically connected in series easily can be provided.

  Next, embodiments of the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and ratios of dimensions and the like are different from actual ones. Accordingly, specific dimensions and the like should be determined in consideration of the following description. Moreover, it is a matter of course that portions having different dimensional relationships and ratios are included between the drawings.

(Schematic configuration of solar cell module)
A schematic configuration of a solar cell module 100 according to an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a side view of a solar cell module 100 according to the present embodiment.

  As shown in FIG. 1, the solar cell module 100 includes a solar cell string 1, a light receiving surface side protective material 2, a back surface side protective material 3, and a sealing material 4. The solar cell module 100 is configured by sealing the solar cell string 1 between the light-receiving surface side protective material 2 and the back surface side protective material 3.

  The solar cell string 1 includes a first solar cell unit 10, a second solar cell unit 15, and first to third wiring members 20a to 20c.

  The first solar cell unit 10 and the second solar cell unit 15 are arranged in a straight line along the arrangement direction. The first solar cell units 10 and the second solar cell units 15 are alternately arranged. The first solar cell unit 10 includes two first solar cells 10a. The second solar cell unit 15 includes two second solar cells 15a.

  The first solar cell 10a and the second solar cell 15a are arranged in a straight line along the arrangement direction. The two first solar cells 10a are electrically connected in parallel by the first wiring member 20a and the third wiring member 20c. The two second solar cells 15a are electrically connected in parallel by the second wiring member 20b and the third wiring member 20c. The first solar cell unit 10 and the second solar cell unit 15 are electrically connected in series by the third wiring member.

  As the first to third wiring members 20a to 20c, a conductive material such as copper formed in a thin plate shape or a twisted wire shape can be used, and a soft conductor (for example, eutectic solder) is used on the surface of the conductive material. May be plated.

  The light receiving surface side protective material 2 is disposed on the light receiving surface side of the sealing material 4 and protects the surface of the solar cell module 100. As the light-receiving surface side protective material 2, glass having translucency and water shielding properties, translucent plastic, or the like can be used.

  The back surface side protective material 3 is disposed on the back surface side of the sealing material 4 and protects the back surface of the solar cell module 100. As the back surface side protective material 3, a glass plate, a resin film such as PET (Polyethylene Terephthalate), or a laminated film having a structure in which a metal foil such as Al is sandwiched between resin films can be used.

  The sealing material 4 seals the solar cell string 1 between the light receiving surface side protective material 2 and the back surface side protective material 3. As the sealing material 4, a translucent resin such as EVA, EEA, PVB, silicon, urethane, acrylic, or epoxy can be used. Further, a sealing structure in which an insulating film such as PET is interposed between such resins can also be used as the sealing material 4.

(Configuration of first solar cell 10a)
Next, the configuration of the first solar cell 10a will be described with reference to FIG. Fig.2 (a) is a top view in the light-receiving surface side of the 1st solar cell 10a. FIG.2 (b) is a top view in the back surface side of the 1st solar cell 10a. FIG.2 (c) is sectional drawing in the AA cut surface of Fig.2 (a). FIG. 2D is a diagram showing a projection plane parallel to the light receiving surface of the first solar cell 10a.

  The first solar cell 10a has a light receiving surface that receives sunlight and a back surface provided on the opposite side of the light receiving surface. Each of the light receiving surface and the back surface is a main surface of the first solar cell 10a.

  As shown in FIG. 2A, the first solar cell 10 a includes a first photoelectric conversion unit 40, a first light receiving surface side thin wire electrode 41, and a first light receiving surface side bus bar electrode 42.

  The first photoelectric conversion unit 40 generates photogenerated carriers by receiving light. The photogenerated carrier refers to holes and electrons that are generated when sunlight is absorbed by the first photoelectric conversion unit 40.

  The first photoelectric conversion unit 40 has an n-type region and a p-type region inside, and a semiconductor junction is formed at an interface portion between the n-type region and the p-type region. The first photoelectric conversion unit 40 can be formed using a semiconductor substrate composed of a crystalline semiconductor material such as single crystal Si or polycrystalline Si, or a semiconductor material such as a compound semiconductor material such as GaAs or InP. The first photoelectric conversion unit 40 has a structure in which the characteristics of the heterojunction interface are improved by inserting a substantially intrinsic amorphous silicon layer between the single crystal silicon substrate and the amorphous silicon layer, You may have what is called a HIT structure.

  The first light receiving surface side thin wire electrode 41 is a current collecting electrode that collects photogenerated carriers from the first photoelectric conversion unit 40. As shown in FIG. 2A, a plurality of first light receiving surface side thin wire electrodes 41 are formed on the light receiving surface of the first solar cell 10a along a direction substantially orthogonal to the arrangement direction. The first light receiving surface side fine wire electrode 41 according to the present embodiment is formed in a line shape over substantially the entire region on the light receiving surface of the first solar cell 10a. The shape and number of the first light receiving surface side thin wire electrodes 41 can be set in consideration of the light receiving area of the first solar cell 10a, the current collection efficiency of the photogenerated carriers, and the like. The first light receiving surface side thin wire electrode 41 can be formed using, for example, a conductive resin paste in which conductive particles as a filler are added to a resin material as a binder, but other materials may be used.

  The first light receiving surface side bus bar electrode 42 is a current collecting electrode that collects photogenerated carriers from the first light receiving surface side thin wire electrode 41. The first light receiving surface side bus bar electrode 42 is formed along the arrangement direction on the light receiving surface of the first solar cell 10a. Accordingly, the first light receiving surface side bus bar electrode 42 intersects the first light receiving surface side thin wire electrode 41. In the present embodiment, the two first light receiving surface side bus bar electrodes 42 are formed, but the number of the first light receiving surface side bus bar electrodes 42 is appropriate in consideration of the size of the first photoelectric conversion unit 40 and the like. Can be set to a large number. The first light receiving surface side bus bar electrode 42 can be formed using the same material as the first light receiving surface side thin wire electrode 41. On the first light receiving surface side bus bar electrode 42, the third wiring member 20 c is disposed along the first light receiving surface side bus bar electrode 42.

  As shown in FIG. 2B, the first solar cell 10 a includes a first back surface side thin wire electrode 43 and a first back surface side bus bar electrode 44.

  The first backside thin wire electrode 43 is a current collecting electrode that collects photogenerated carriers from the first photoelectric conversion unit 40. Similar to the first light receiving surface side thin wire electrode 41, a plurality of first back surface side thin wire electrodes 43 are formed on the back surface of the first solar cell 10a along a direction substantially orthogonal to the arrangement direction. The shape and number of the first backside thin wire electrodes 43 are set in consideration of the current collection efficiency of the photogenerated carriers. The first back surface side thin wire electrode 43 can be formed using the same material as the first light receiving surface side thin wire electrode 41.

  The first backside busbar electrode 44 is a current collecting electrode that collects photogenerated carriers from the first backside thin wire electrode 43. The first back side bus bar electrode 44 is formed along the arrangement direction on the back side of the first solar cell 10a. Therefore, the first back surface side bus bar electrode 44 intersects the first back surface side thin wire electrode 43. In the present embodiment, the two first back side bus bar electrodes 44 are formed, but the number of the first back side bus bar electrodes 44 is an appropriate number in consideration of the size of the first photoelectric conversion unit 40 and the like. Can be set to The first backside bus bar electrode 44 can be formed using the same material as the first light receiving surface side fine wire electrode 41. A first wiring member 20 a is disposed on the first back side bus bar electrode 44.

  Here, as shown in FIG. 2C, the first light receiving surface side bus bar electrode 42 is formed inside the first back surface side bus bar electrode 44. Specifically, as shown in FIG. 2D, the first light receiving surface side bus bar electrode 42 and the first back surface side bus bar electrode 44 do not overlap on the projection surface parallel to the light receiving surface. In FIG. 2D, attention is focused only on the bus bar electrode.

(Configuration of the second solar cell 15a)
Next, the configuration of the second solar cell 15a will be described with reference to FIG. FIG. 3A is a plan view on the light receiving surface side of the second solar cell 15a. FIG.3 (b) is a top view in the back surface side of the 2nd solar cell 15a. FIG.3 (c) is sectional drawing in the BB cut surface of Fig.3 (a). FIG.3 (d) is a figure which shows the projection surface parallel to the light-receiving surface of the 2nd solar cell 15a.

  The second solar cell 15a has a light receiving surface that receives sunlight and a back surface provided on the opposite side of the light receiving surface. Each of the light receiving surface and the back surface is a main surface of the second solar cell 15a.

  As shown in FIGS. 3A and 3B, the second solar cell 15a includes a second photoelectric conversion unit 50, a second light receiving surface side fine wire electrode 51, a second light receiving surface side bus bar electrode 52, and a second back surface side. A thin wire electrode 53 and a second back side bus bar electrode 54 are provided. Since these detailed structures are the same as that of the said 1st solar cell 10a, description is abbreviate | omitted. Hereinafter, differences between the first solar cell 10a and the second solar cell 15a will be described.

  As shown in FIG. 2C, the first light receiving surface side bus bar electrode 42 is formed inside the first back surface side bus bar electrode 44. Specifically, as shown in FIG. 2D, the first light receiving surface side bus bar electrode 42 and the first back surface side bus bar electrode 44 do not overlap on the projection surface parallel to the light receiving surface. In FIG. 2D, attention is focused only on the bus bar electrode.

  As shown in FIG. 3C, the second light receiving surface side bus bar electrode 52 is formed outside the second back surface side bus bar electrode 54. Specifically, as shown in FIG. 3D, the second light receiving surface side bus bar electrode 52 and the second back surface side bus bar electrode 54 do not overlap on the projection surface parallel to the light receiving surface. In FIG. 2D, attention is focused only on the bus bar electrode.

(How to connect solar cell units)
Next, a method of connecting the first solar cell unit 10 and the second solar cell unit 15 will be described with reference to FIG. FIG. 4A is a diagram schematically showing the arrangement of bus bar electrodes provided in each of the first solar cell 10a and the second solar cell 15a. FIG. 4B is a plan view on the light receiving surface side of the first solar cell unit 10 and the second solar cell unit 15.

  As shown in FIG. 4A, the first solar cell unit 10 and the second solar cell unit 15 are arranged in a straight line along the arrangement direction. Therefore, the first solar cell 10a, the first solar cell 10a, the second solar cell 15a, and the second solar cell 15a are sequentially arranged in a straight line.

  On the light receiving surface of the first solar cell 10a, a first light receiving surface side bus bar electrode 42 formed along the arrangement direction is formed. On the back surface of the first solar cell 10a, a first back-side busbar electrode 44 formed along the arrangement direction is formed. The first light receiving surface side bus bar electrode 42 is located inside the first back surface side bus bar electrode 44.

  On the light receiving surface of the second solar cell 15a, a second light receiving surface side bus bar electrode 52 formed along the arrangement direction is formed. On the back surface of the second solar cell 15a, a second back-side busbar electrode 54 formed along the arrangement direction is formed. The second light receiving surface side bus bar electrode 52 is located outside the second back surface side bus bar electrode 54.

  Since the first solar cells 10a have the same configuration, the first light receiving surface side bus bar electrode 42 of one first solar cell 10a and another first solar cell 10a adjacent to the first solar cell 10a. The first light receiving surface side bus bar electrode 42 is positioned on a straight line along the arrangement direction. Moreover, the 1st back surface side bus-bar electrode 44 of one 1st solar cell 10a and the 1st back surface side bus-bar electrode 44 of the other 1st solar cell 10a are located on a straight line along the sequence direction.

  Similarly, since the second solar cells 15a have the same configuration, the second light receiving surface side bus bar electrode 52 of one second solar cell 15a and another second adjacent to the one second solar cell 15a. The second light receiving surface side bus bar electrode 52 of the solar cell 15a is positioned on a straight line along the arrangement direction. Moreover, the 2nd back surface side bus-bar electrode 54 of the 1st 2nd solar cell 15a and the 2nd back surface side bus-bar electrode 54 of the other 2nd solar cell 15a are located on a straight line along the sequence direction.

  Further, the first light receiving surface side bus bar electrode 42 of the first solar cell 10a and the second back surface side bus bar electrode 54 of the second solar cell 15a adjacent to the first solar cell 10a are arranged in the arrangement direction. Along a straight line. In addition, the first back surface side bus bar electrode 44 of the first solar cell 10a and the second light receiving surface side bus bar electrode 52 of the second solar cell 15a adjacent to the first solar cell 10a are arranged in the arrangement direction. Along a straight line.

  In addition, the 1st back surface side bus-bar electrode 44 which each of the 1st solar cell 10a contained in the 1st solar cell unit 10 has, and the 2nd light reception surface side which each of the 2nd solar cell 15a contained in the 2nd solar cell unit 15 has. The bus bar electrode 52 is positioned on a straight line along the arrangement direction.

  On each bus bar electrode, as shown in FIG. 4B, the first to third wiring members 20a to 20c are electrically connected. The first to third wiring members 20a to 20c are connected to each bus bar electrode by soldering, for example.

  Specifically, the first wiring member 20 a is connected to the first back side bus bar electrode 44 included in each of the first solar cells 10 a included in the first solar cell unit 10. The first wiring member 20a extends in a straight line along the arrangement direction. The second wiring member 20 b is connected to the second light receiving surface side bus bar electrode 52 included in each of the second solar cells 15 a included in the second solar cell unit 15. The second wiring member 20b extends in a straight line along the arrangement direction. Further, the third wiring member 20 c includes a first light receiving surface side bus bar electrode 42 included in each of the first solar cells 10 a included in the first solar cell unit 10, and a second solar cell 15 a included in the second solar cell unit 15. Each is connected to a second back side bus bar electrode 54. The third wiring member 20c extends in a straight line along the arrangement direction.

  As described above, the first solar cells 10a included in the first solar cell unit 10 are electrically connected in parallel. Similarly, the second solar cells 15a included in the second solar cell unit 15 are electrically connected in parallel. The first solar cell unit 10 and the second solar cell unit 15 are electrically connected in series.

  Here, as shown in FIG. 4B, in the region α between the two first solar cells 10a included in the first solar cell unit 10, the first wiring member 20a and the third wiring member 20c do not overlap. . Similarly, in the region β between the two second solar cells 15a included in the second solar cell unit 15, the second wiring material 20b and the third wiring material 20c do not overlap.

  The solar cell string 1 is formed by connecting a large number of a set of units including the first solar cell unit 10 and the second solar cell unit 15 described above. Note that the solar cell module 100 may have a configuration in which a plurality of solar cell strings 1 are electrically connected.

(Function and effect)
In the solar cell module 100 according to this embodiment, the first back surface side bus bar electrodes 44 included in each of the first solar cells 10a included in the first solar cell unit 10 are connected by the first wiring member 20a. The second light receiving surface side bus bar electrodes 52 included in each of the second solar cells 15a included in the second solar cell unit 15 are connected by the second wiring member 20b. The first light receiving surface side bus bar electrodes 42 included in each of the first solar cells 10 a included in the first solar cell unit 10 and the second back surface side bus bar included in each of the second solar cells 15 a included in the second solar cell unit 15. The electrodes 54 are connected to each other by the third wiring member 20c. The third wiring member 20c extends in a straight line along the arrangement direction.

  Accordingly, the first solar cell unit 10 and the second solar cell unit 15 can be electrically connected in series by the straight third wiring member 20c. That is, in the connection step between the solar cell units, only the straight third wiring member 20c may be soldered to the bus bar electrode. Therefore, it is possible to reduce the work of complicatedly soldering a large number of components. As a result, the manufacturing cost of the solar cell module 100 can be reduced.

  Furthermore, in the area | region (alpha) between the two 1st solar cells 10a contained in the 1st solar cell unit 10, the 1st wiring material 20a and the 3rd wiring material 20c do not overlap. Similarly, in the region β between the two second solar cells 15a included in the second solar cell unit 15, the second wiring material 20b and the third wiring material 20c do not overlap.

  Therefore, when the first to third wiring members 20a to 20c are soldered to the bus bar electrodes, it is possible to suppress the solder melted from one wiring member from coming into contact with the other wiring member. As a result, occurrence of a short circuit between the wiring members is suppressed, and the manufacturing yield of the solar cell module 100 can be improved.

(Modification of the embodiment)
Next, a modification of the above embodiment will be described with reference to FIGS. FIG. 5A is a plan view of the third solar cell 10b on the light receiving surface side. FIG. 5B is a plan view of the back surface side of the third solar cell 10b. FIG.5 (c) is sectional drawing in the CC cut surface of Fig.5 (a). FIG. 6A is a plan view of the light receiving surface side of the fourth solar cell 15b. FIG. 6B is a plan view of the back surface side of the fourth solar cell 15b. FIG.6 (c) is sectional drawing in the DD cut surface of Fig.6 (a).

  The difference from the above embodiment is that the line width of the third back side bus bar electrode 45 is wider than the line width of the first back side bus bar electrode 44 and the line width of the fourth back side bus bar electrode 55 is the second back side. This is a point wider than the line width of the side bus bar electrode 54. In other configurations, the third solar cell 10b is the same as the first solar cell 10a, and the fourth solar cell 15b is the same as the second solar cell 15a.

  In this modification, as shown in FIG. 5C and FIG. 6C, the light receiving surface side bus bar electrode is disposed above the back surface side bus bar electrode. That is, on the projection plane parallel to the light receiving surface, the back surface side bus bar electrode and the light receiving surface side bus bar electrode overlap.

  In addition, when a solar cell does not utilize the incident light from a back surface, there is no restriction | limiting in a shape in a back surface side bus-bar electrode.

  As described above, the present invention relates to the position of the wiring member connected to each bus bar electrode. Therefore, if the wiring material connected to the light receiving surface side bus bar electrode and the wiring material connected to the back surface side bus bar electrode do not overlap on the projection surface parallel to the light receiving surface, the effect of the present invention can be obtained. it can.

(Other embodiments)
Although the present invention has been described according to the above-described embodiments, it should not be understood that the descriptions and drawings constituting a part of this disclosure limit the present invention. From this disclosure, various alternative embodiments, examples and operational techniques will be apparent to those skilled in the art.

  For example, in the above embodiment, each of the first solar cell unit 10 and the second solar cell unit 15 includes two solar cells, but the number of solar cells included in the solar cell unit is not limited.

  Further, in the above embodiment, each of the first solar cell 10a and the second solar cell 15a has the line-shaped thin wire electrode on the light receiving surface and the back surface, but does not have the shape of the thin wire electrode. Also good.

  Moreover, in the said embodiment, although two wiring materials were connected to each on the light-receiving surface and back surface of the 1st solar cell 10a or the 2nd solar cell 15a, the number of wiring materials is not limited to this. . However, it is preferable that the same number of wiring members are connected to the light receiving surface and the back surface of the solar cell, respectively.

It is a side view of the solar cell module 100 which concerns on embodiment of this invention. It is a figure for demonstrating the structure of the 1st solar cell 10a which concerns on embodiment of this invention. It is a figure for demonstrating the structure of the 2nd solar cell 15a which concerns on embodiment of this invention. It is a top view by the side of the light-receiving surface of the 1st solar cell unit 10 and the 2nd solar cell unit 15 which concern on embodiment of this invention. It is a figure for demonstrating the structure of the 3rd solar cell 10b which concerns on embodiment of this invention. It is a figure for demonstrating the structure of the 4th solar cell 15b which concerns on embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Solar cell string 2 ... Light-receiving surface side protective material 3 ... Back surface side protective material 4 ... Sealing material 10 ... 1st solar cell unit 10a ... 1st solar cell 10b ... 3rd solar cell 15 ... 2nd solar cell unit 15a 2nd solar cell 15b 4th solar cell 20a 1st wiring material 20b 2nd wiring material 20c 3rd wiring material 40 1st photoelectric conversion part 41 1st light-receiving surface side fine wire electrode 42 1st light reception Surface-side bus bar electrode 43... First back-side thin wire electrode 44... First back-side bus bar electrode 50... Second photoelectric conversion portion 51 .. Second light-receiving surface-side thin wire electrode 52. Side thin-line electrode 54 ... 2nd back side bus bar electrode 45 ... 3rd back side bus bar electrode 55 ... 4th back side bus bar electrode 100 ... Solar cell module

Claims (1)

A solar cell module in which a first solar cell unit and a second solar cell unit that are alternately arranged in a straight line along an arrangement direction between a light-receiving surface side protective material and a back surface side protective material are sealed. ,
Each of the first solar cell unit and the second solar cell unit includes a plurality of solar cells,
The solar cell is
A light receiving surface on which light is incident;
A back surface provided on the opposite side of the light receiving surface;
On the light receiving surface, a light receiving surface side electrode formed along the arrangement direction;
On the back surface, having a back side electrode formed along the arrangement direction,
The plurality of light receiving surface side electrodes of the plurality of solar cells of the first solar cell unit, and the plurality of solar cells of the second solar cell unit adjacent to one of the first solar cell units. The backside electrodes are connected by the first wiring material,
A plurality of the back-surface-side electrode each other of the plurality of the solar cell of the first solar cell unit, a plurality of the plurality of the solar cell of the second solar cell unit adjacent to the other of the first solar cell unit The light receiving surface side electrodes are connected by the second wiring material,
The solar cell module, wherein the first wiring member and the second wiring member do not overlap on a projection plane parallel to the light receiving surface.

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