Abstract: A combined solar collector and storage device comprises a housing including a plurality of wire mesh racks for retaining and storing rock therein and also including a front face formed of mesh allowing solar radiation to impinge on the rock and penetrate deeply into the housing. A plurality of intersecting tunnels being formed of mesh include a plurality of sunlight entry tunnels and inner chamber tunnels wherein the inner chamber tunnels intersect the sunlight entry tunnels at closely spaced intervals so that solar radiation may be directed toward rock in the interior of the housing. The housing also includes a frame, a plurality of side walls and a base, which cooperate with the front face to retain the rock within the housing.