Abstract: A solar energy concentrating system with high light collection efficiency includes a light concentrating unit, a light homogenizing unit and photovoltaic modules. The light concentrating unit includes a parabolic reflector and an ellipsoidal reflector which are coaxial and confocal. The light homogenizing unit includes an infrared filter and a hollow spherical reflector with a hole in its surface. When the system is under illumination, light is concentrated by the light concentrating unit through the hole in the spherical reflector surface and reflected by the inner surface of the spherical reflector onto the photovoltaic modules. The infrared filter covers the hole in the spherical reflector surface and reduces the heat in the photovoltaic modules under concentrated light. The combination of the parabolic reflector and the ellipsoidal reflector obtain highly concentrated light, and the hollow spherical reflector ensures light uniformity on the photovoltaic modules and light utilization efficiency.

Abstract: A solar cell module (1a) is constituted such that a solar cell panel (9) is held using a main frame member (10) that holds one side of the solar cell panel (9) and a sub-frame member (20) that holds an adjoining side that adjoins this one side, the main frame member (10) is constituted from a solar cell panel main holding portion (11), a main wall portion (12), and a main bottom piece (16), the sub-frame member (20) is constituted from a solar cell panel sub-holding portion (21), a sub-wall portion (22), and a sub-bottom piece (26), the sub-bottom piece (26) of the sub-frame member (20) is positioned above the main bottom piece (16) of the main frame member (10), the lower surface near the side end of this sub-bottom piece (26) abuts against the upper surface near the side end of the main bottom piece (16), and a water barrier piece (28) bent upward is formed at the inner side edge of this sub-bottom piece (26).