Here is a great hurdle accomplished by the “Big Brains“ (Daniel Nocera and Matthew Kanan) at MIT. The article is via Engadget.com
The gist is how to store energy when the sun is not out, and the solution? Look to plants and photosynthesis to get some ideas and eureka, split water into its elemental gases and store them for later using fuel cell technology. This is going to help us all. Check out the video after the jump.