The UK Government has announced further funding for trials of rooftop photovoltaic (pV) generating units. An initial round of funding already supports 166 domestic rooftop pV installations. Now £3 million has been promised to fund a further 300 domestic installations.At the same time a larger solar pV demonstration programme has been allocated £10 million over the next three years. Initially, the government intends to allocate £3 million for twelve to fifteen installations on non-domestic buildings, each larger than the 20kW units being used for the home installations. The aim is to provide the same boost to the solar pV industry that has been seen in Japan and Germany.