Fully Renewable: biogas+wind+solar at peak and base

http://www.youtube.com/watch?v=tR8gEMpzos4

Scientists of the University of Kassel in Germany prove that the entire country can be powered by renewables only. They connected biogas, wind and solar power in a distributed way and show it can deliver both baseloads and peakloads.

http://biopact.com/2007/12/germany-is-doing-it-reliable.html

for more info.