Back to the Photovoltaic Future with Perovskites.

I will not be too long before rooftop solar panels will become a preferred option for new construction of houses in the U.S. and elsewhere. Many recent projections of new energy installations predict a surge in wind and photovoltaic (PV)based installations during the next 25 years. The availability of affordable PV panels is rendering the installation of solar panels on residential rooftops a more common occurrence in the U.S. and elsewhere. According to the recently released Solar Marketplace Intel Report by Energy Sage (https://www. energysage.com/news/energysage-marketplace-intel-report), the average gross cost of PV installation now ranges from $3.21 to 4.37 per watt, with an average payback time of 7.5 years. In 2015 alone, homeowners with installed PV units met ∼85% of their electricity needs.