Abstract: A solar collector comprises a series of absorber modules each formed as an extrusion that forms side-by-side flow channels. In one form of the invention, end plates close the flow channels at their ends, the ribs between the flow channels being cut away at their ends in order to define a sinuous flow path from the outside to the inside of the collector. The absorber modules are supported at the relatively low temperature sides adjacent the inlets, and with conductive engagement only with the bottom wall of the absorber.