Hops, space program funding also supported the development of PV panels. They work great in lightweight applications where day, night, weather, transmission, and expense aren't a problem.
Thanks to NASA's research and development teams, contemporary solar power designs are significantly better than those aboard the ISS [International Space Station]. In fact, NASA has an entire division, called the Photovoltaic & Space Environments Branch, dedicated to addressing solar power and related challenges. This branch actively partners with private companies and shares scientific knowledge in the hopes of accelerating technological developments.