This type of technology has been around for a while, there are some commercial offerings in the UK -- search for PV-thermal. Should be a useful source of heat

This type of technology has been around for a while, there are some commercial offerings in the UK -- search for PV-thermal. Should be a useful source of heat into a heat-pump system, either for space or water heating... The whole idea though probably makes more sense though on easy-access flat roofs rather than pitched roofs so why the tile? (And why do we still make pitched roofs if we are doing energy efficiency? Much better to condense out as much of the internal moisture as you can to recover the heat from there)