Solar energy absorbing panel

A panel adapted for absorbing solar radiation in a solar energy collector or the like and efficiently transferring the absorbed heat energy to an airstream moving thereover, and comprising a generally rectangular sheet of heat conducting material and having a generally planar first surface and an opposite surface, and opposite end edges and opposite side edges, said sheet being composed of a plurality of interconnected side by side sections, with each section extending between said end edges and including a planar medial portion and opposite sides, and with the adjacent sides of adjacent sections extending substantially perpendicularly from said planar medial portion and being contiguous and interconnected to each other to form parallel fins extending outwardly from the opposite surface of the sheet and between said opposite end edges, the outer sides of those sections adjacent each of the opposite side edges of the panel being offset in a common direction, and such that said offset sides are co-planar with each other and parallel to the plane of said first surface, and said panel further comprising slot means mounted along one of said end edges for receiving the other end edge of another like panel therein and such that a plurality of panels may be readily joined in an end-to-end arrangement and with said fins extending in a common direction, whereby the panel is adapted to transfer heat to air passing along said opposite surface in a direction parallel to said fins, and the panel may be readily fabricated from standard sized sections into a desired width.