1. Articles from wsj.com

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    1. The Race to Build a Better Battery for Storing Power

      The Race to Build a Better Battery for Storing Power

      There’s the battery in your watch. There’s the battery in your mobile phone. And then there’s the battery at Green Mountain Power’s Stafford Hills solar farm in Rutland, Vt. The lithium-ion gargantuan is housed in two trailer-truck-size green metal containers. It sits atop a 10-acre former landfill and captures electricity from 7,722 nearby solar panels—enough to power 2,000 homes on a sunny day. What’s revolutionary about this system isn’t the solar farm; it’s the size and purpose of the battery, which offers 3.4 megawatt-hours of storage, enough to supply backup power to about 170 homes for a day, if needed.

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      Mentions: DoE Harvard U.S.
    2. To Cut Energy Bills, Companies Tap Battery Power - WSJ

      To Cut Energy Bills, Companies Tap Battery Power - WSJ

      J.C. Penney Co. Inc. recently was able to cut the power bills of six of its Southern California stores. The secret: batteries. Penney’s lithium-ion batteries, made by Panasonic Corp., charge by night in metal cases in the storage areas of each facility. Then, by day, when power from the grid costs more, they help run the stores’ air-conditioning. The batteries also help the stores avoid high utility fees, called demand charges.

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      Mentions: CA HI Panasonic
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