The critical issue of back up power

20 percent of America’s – and perhaps the world’s – electricity could soon come from wind and solar. Our societies thus need reliable, cheap and sustainable energy storage solutions.

Concentrated solar could benefit from molten salts, yet wind energy doesn’t have yet its own solution. German and Swiss utilities are working on Compressed Air Energy Storage (CAES) as among these solutions.

The first test plant using CAES is due to be completed in 2013 and will be able to store the equivalent capacity of 200 MW during five hours.

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