How to Use Solar Energy at Night

http://www.electronista.com/articles/11/03/04/sumitomo.battery.90.percent.cheaper.than.li.ion/

molten salt battery to replace lithium ion in a few years!

http://www.scientificamerican.com/article.cfm?id=how-to-use-solar-energy-at-night

This is old news but still relevant considering all those who downplay solar in the media.
Comparing efficiencies of renewables with fossil fired plants makes no sense when one is clean and limitless and the other is finite and dirty.