To provide a generator, having a plurality of solar battery modules where the solar batteries are not damaged and a hot spot phenomenon is not generated, in the case that the partial shadow is generated.

In this generator, a plurality of solar battery modules 101 are installed on a slanted surface such as a roof. In the battery module 101, a plurality of rectangular solar batteries 102 are sealed between transmissive surface protecting material and back protecting material, by using adhesive resin sealing material. The batteries 102 are arranged in one column in a direction almost perpendicular to the slant direction of the slanted surface, all of the solar batteries in the one column are electrically connected in series, and long edges 115 of the rectangular solar batteries are almost parallel to the slanted direction of the slanted surface.