Abstract: A solar panel module comprises a photovoltaic panel supported on a frame for location on a supporting surface. The frame comprises two generally parallel side walls which taper upwardly from a nose section to a rear section of the frame to provide support for the photovoltaic panel above the roof surface. The frame further comprises connections for attaching it to adjoining frames of the solar panel assembly. The rear section has a curvilinear surface which terminates in a step which extends between the side walls of the frame and is formed in its riser with at least one opening which places the interior of the frame rear section in communication with the external atmosphere.