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Pumped Hydro Storage Still Cheaper Than Batteries

| Written by John Farrell | No Comments | Updated on Oct 19, 2010 The content that follows was originally published on the Institute for Local Self-Reliance website at

A nice, short comparison of the cost of electricity storage with pumped hydropower and batteries.

Using pumped hydro to store electricity costs less than $100 per kilowatt-hour and is highly efficient, Chu told his energy advisory board during a recent meeting. By contrast, he said, using sodium ion flow batteries — another option for storing large amounts of power — would cost $400 per kWh and have less than 1 percent of pumped hydro’s capacity.

Of course, you need to have a river with a likely reservoir location to have any significant quantity of pumped storage, making the article’s reference to Texas a bit ironic.

For those unfamiliar with the concept, here’s a nice diagram of pumped storage from Consumers Energy:

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About John Farrell

John Farrell directs the Energy Democracy initiative at the Institute for Local Self-Reliance and he develops tools that allow communities to take charge of their energy future, and pursue the maximum economic benefits of the transition to 100% renewable power. More

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