If you are a DIYer, now there’s a true “plug and play” solar power generator in the true sense of the word.
PluggedSolar.com has developed turnkey solar systems that allow you to install them on your roof and then simply plug them into the wall socket, and you will be saving electricity costs immediately. The company claims a payback of the units to be about 7 years.
More details in this article from clean technica.