Project Sunroof is an online mapping tool that uses Google Maps, Google Earth and other data to calculate solar potential and provides data for a given state, city, zip code or specific address.
This project in 2015 only included solar data for a few areas in California. A year later, the solar map expanded across the country, and in 2017 some Texas cities, including Austin, were added to the project. The data coverage now includes about 60 million buildings in the country.
Target has pending city permits to add solar panels at several Austin stores. H-E-B and Ikea has been exploring the concept, too.