 However, the areas of highest insolation are distant to Australia's population centres.According to The Institute for Sustainable Futures, the School of Photovoltaic and Renewable Energy Engineering (SPREE) at the University of New South Wales (UNSW) Australia has the potential to install 179 GW of solar power on roofs across the nation.At the end of 2018 Australia had just over 8 GW of rooftop solar.