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MIT’s Liquid Metal Stores Solar Power Until After Sundown

A 40-foot trailer loaded with 25 tons of liquid metals may be the solution to the renewable-energy industry’s biggest challenge: making sure electricity is available whenever it’s needed.

A Boston-area startup founded by MIT researchers is working to turn this new concept into a commercially viable product, liquid-metal batteries that will store power for less than $500 a kilowatt-hour. That’s less than a third the cost of some current battery technologies.