Abstract: Modules comprising photo-cells encapsulated in laminates comprising at least one rigid member and at least one transparent member laminated together by a transparent hot melt adhesive such as plasticised polyvinyl butyral or an ethylene copolymer. The preferred members are glass sheets and the preferred ethylene copolymer is a terpolymer of ethylene, methylmethacrylate and methacrylic acid. In a modification of the invention the hot melt adhesive need not be transparent provided that in the laminate it merely surrounds the photo-cell and does not cover its light-sensitive surface.