05 May '11, 9pm

14 GW Energy Storage Market by 2020 in US Says EPRI

The EPRI study looked at what is currently out there, not what is in development, assuming nothing new is likely to be grid-ready by 2015. Compared with what is needed, there is practically no energy storage globally now, with the vast majority in pumped hydro : 127 GW (worldwide). Compressed Air Energy Storage (CAES) comes a distant second with 440 MW. Sodium-sulfur batteries supply 316 MW, and four other kinds of batteries supply a few megawatts here and there to total 85 MW, and flywheels supply just 25 MW.

Full article: http://cleantechnica.com/2011/05/05/14-gw-energy-storage-...

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