TECHNOLOGY FOCUS - POLYMERS - Preferred Components: (I) further comprises: a fluoropolymer film (212); an anti-reflective film (234) positioned between the transparent superstrate and the photovoltaic module; and moisture resistant caulking, where the caulking is located on the edges of the photovoltaic module and the transparent superstrate, and within the frame to seal the edges of the photovoltaic module and the transparent superstrate. The fluoropolymer film comprises polyvinylidene fluoride. The transparent superstrate is a glass sheet. A surface of the underlying membrane opposite the photovoltaic module includes an adhesive. The adhesive is hot melt butyl. The perimeter of the underlying membrane is heat-welded to a thermoplastic roofing membrane. The heat-weldable thermoplastic material is thermoplastic olefin. The frame is adhered to an exterior surface of the transparent superstrate with an adhesive (220) proximate its perimeter. The transparent superstrate comprises a flexible thermoplastic material heat-weldable to the thermoplastic material comprising the underlying membrane, and where the perimeter of the flexible superstrate comprises the frame and is heat-welded to the underlying membrane. The underlying membrane extends beyond the edge of the photovoltaic module. Preferred Method: The method further comprises: laminating the fluoropolymer film to the underlying membrane using a tie layer and under the photovoltaic module; providing an adhesive on a surface of the underlying membrane opposite the photovoltaic module; heat-welding the perimeter of the underlying membrane to the thermoplastic roofing membrane; positioning an anti-reflective film between the transparent superstrate and the photovoltaic module; adhering the frame to an exterior surface of the transparent superstrate proximate its perimeter with an adhesive; and providing moisture-resistant caulking on the edges of the photovoltaic module and the transparent superstrate, and within the frame to seal the edges of the photovoltaic module and the transparent superstrate.