According to experts, every fifth German roof could be equipped with a solar thermal system – a worthwhile investment for many homeowners. The solar roof cadastre provides information on who is eligible in more and more cities and municipalities. For each roof, an interactive map shows whether it is suitable for a solar thermal or photovoltaic installation - simply, free of charge, and with no strings attached. If desired, the need and output are calculated on an individual basis. In addition, the cadastre enables cities and
municipalities to recognize the potential slumbering in public spaces and shows how it can be tapped.