I read a good article on this technology on CNN.com last month:

https://www.cnn.com/clean-energy-solar-diy-balcony-backyard-...

I live in Virginia, and REALLY want to try this, but I am sure Dominion Virginia Power and my HOA would not be happy; rooftop solar is out of my price range. The article I provided a link to says they are trying to change the laws in the U.S. to enable everybody to do this, and I really hope they are successful.