Wednesday, June 04, 2008

California: Batteries Included?!

I was recently asked "Suppose that California does build a whole bunch of clean solar electrical generating capacity; even then, we still need a solution for nighttime electrical usage. How big would a ``battery'' need to be to keep the power on overnight?". The spreadsheet below has details on various options. With existing technology, molten salt is clearly the leading battery! You can also view this in a web page by itself or as an xls file.

Update: Presidio, TX will have a sodium sulfur battery (named BOB) to store power for their town.