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A solar cell module includes a plate-shaped solar panel including a plurality of solar cells arranged on same plane; a plate-shaped cell protection member that covers the plural solar cells that are arranged on the same plane; and a surface protection member that is bonded onto a top surface of the

A solar cell module includes a plate-shaped solar panel including a plurality of solar cells arranged on same plane; a plate-shaped cell protection member that covers the plural solar cells that are arranged on the same plane; and a surface protection member that is bonded onto a top surface of the cell protection member; an outer frame that supports a circumference of the solar panel; and a brace having rigidity against bending and that supports a center area of a back surface of the solar panel in such a manner that both ends of the brace are joined to each of two opposed positions of the outer frame. An initial tension is provided to the brace.

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1. A solar cell module comprising: a plate-shaped solar panel including a plurality of solar cells arranged on a same plane;a plate-shaped cell protection member that covers the plural solar cells that are arranged on the same plane;a surface protection member that is bonded onto a top surface of th

1. A solar cell module comprising: a plate-shaped solar panel including a plurality of solar cells arranged on a same plane;a plate-shaped cell protection member that covers the plural solar cells that are arranged on the same plane;a surface protection member that is bonded onto a top surface of the cell protection member;an outer frame that supports a circumference of the solar panel;a first brace having rigidity against bending and that supports a center area of a back surface of the solar panel in such a manner that both ends of the first brace are joined to each of two opposed positions of the outer frame; anda second brace having rigidity against bending and that supports the center area of the back surface of the solar panel in such a manner that both ends of the second brace are joined to two other opposed positions of the outer frame wherein the first brace and the second brace intersect with each other in the center area; andan initial tension is provided to the braces. 2. The solar cell module according to claim 1, further comprising: a supporting member that is arranged on the braces and that supports a solar cell portion arranged on the center area on the back surface of the solar panel, wherein the supporting member includes a supporting plate that is formed in such a manner that a circumference of the supporting plate is arranged in a gap between the plural solar cells. 3. The solar cell module according to claim 2, wherein the supporting member comprises: intersecting grooves for receiving intersecting portions of the first and the second brace. 4. The solar cell module according to claim 1, comprising: a tensioner arranged at least one of the braces for adjusting the tension of at least one brace. 5. A solar cell module comprising: a plate-shaped solar panel including a plurality of solar cells arranged on a same plane;a plate-shaped cell protection member that covers the plurality of solar cells that are arranged on the same plane;a surface protection member that is bonded onto a top surface of the plate-shaped cell protection member;a back-surface plate that is bonded onto a back surface of the plate-shaped cell protection member; andan outer frame that supports a circumference of the solar panel, wherein a thickness of the back-surface plate is determined so that a neutral axis of a bending deformation for the solar cell module is located within a thickness of the plate-shaped cell protection member. 6. The solar cell module according to claim 5, wherein a thickness t2 of the back-surface plate is set to a value equal to or larger than a thickness tA that is calculated by Equation (1) and equal to or smaller than a thickness tB that is calculated by Equation (2): tA=E1E2⁢t12+t32-t3(1)tB=E1E2⁢t1⁡(t1+2⁢⁢t3)(2)where E1 is a modulus of elasticity of the surface protection member, t1 is a thickness of the surface protection member, E2 is a modulus of elasticity of the back-surface plate, and t3 is a thickness of the plate-shaped cell protection member. 7. The solar cell module according to claim 5, wherein the back-surface plate is a sandwich-structured panel in which a core material is sandwiches between two coat plates, anda thickness t2 is set to a value that is calculated by Equation (3), and the modulus of elasticity E2 of the sandwich-structured panel is set to a value that is calculated by Equation (4): t2=2⁢⁢t2⁢⁢a+t2⁢⁢b(3)E2=E2⁢⁢a⁢2⁢⁢t2⁢⁢a2⁢⁢t2⁢⁢a+t2⁢⁢b(4)where E2a is a modulus of elasticity of the coat plate, t2a is a thickness of the coat plate, and t2b is a thickness of the core material.