(WO9209768-A1)      A roof structure comprises panels (14) of desired length, each having a galvanised steel supportive layer which has side supporting flanges (22) interconnected together to form the roof assembly (10). The mid-portion (20) of each panel has a photovoltaic surface made from amorphous semiconductor material which is laminated onto the galvanised steel with a protective plastic transparent polymer coating laminated above the photovoltaic material.    The laminated galvanised steel and the photovoltaic layers are rolled into a coil and transported on site where it is unrolled, cut to size having the flanges formed to construct the rigid panels and having the panels assembled together via clips and weatherproof battens. The photovoltaic surfaces are connected together via electrical conduit coupled through couplings under the panels and between the frame members.    USE -   Energy-saving photovoltatic rigid panels for use e.g. on roof.    (JP6503684-W)      A roof structure comprises panels (14) of desired length, each having a galvanised steel supportive layer which has side supporting flanges (22) interconnected together to form the roof assembly (10). The mid portion (20) of each panel has a photovoltaic surface made from amorphous semiconductor material which is laminated onto the galvanised steel with a protective plastic transparent polymer coating laminated above the photovoltaic material.    The laminated galvanised steel and the photovoltaic layers are rolled into a coil and transported on site where it is unrolled, cut to size having the flanges formed to construct the rigid panels and having the panels assembled together via clips and weather-proof battens. The photovoltaic surfaces are connected together via electrical conduit coupled through couplings under the panels and between the frame members.    USE -   Energy-saving photovoltaic rigid panel for use e.g. on roof.    (EP559803-B1)      A roof structure comprises panels (14) of desired length, each having a galvanised steel supportive layer which has side supporting flanges (22) interconnected together to form the roof assembly (10). The mid portion (20) of each panel has a photovoltaic surface made from amorphous semiconductor material which is laminated onto the galvanised steel with a protective plastic transparent polymer coating laminated above the photovoltaic material.    The laminated galvanised steel and the photovoltaic layers are rolled into a coil and transported on site where it is unrolled, cut to size having the flanges formed to construct the rigid panels and having the panels assembled together via clips and weather-proof battens. The photovoltaic surfaces are connected together via electrical conduit coupled through couplings under the panels and between the frame members.    USE -   Energy-saving photovoltaic rigid panel for use e.g. on roof.