Each of solar battery modules includes a rectangular solar battery panel, and a holding member extending from an inner side of the solar battery panel to opposite short sides thereof in a direction parallel to a long side of the solar battery panel. A mount includes rod-like members, to which a row of short-side groups in which sets of short sides of the solar battery panels adjacent to each other are arranged in a direction along the short sides is fitted via the holding members. The holding members are bonded to a rear surface of the solar battery panel. The long side is equal to or longer than 1.3 meters, and the short side is equal to or longer than 0.9 meter. The solar battery panel includes a glass substrate having a total plate thickness of equal to or smaller than 2.5 millimeters.