The company I work for is busy installing 3MW of solar power to cover roughly 1,800 car ports. Check out this link its got pics of the construction and everything.
http://mybroadband.co.za/news/energy/164662-telkoms-huge-solar-power-plant-photos.html
If you live in certain parts of the US SolarCity is an option. If you qualify they cover the upfront costs, install, maintenance etc.