Green Mountain Power’s industrial-size battery stores enough electricity from solar panels that it can provide backup power to 170 homes for an entire day. Photo: Green Mountain PowerThere’s the battery in your watch. And then there’s the battery at Green Mountain Power’s Stafford Hills solar farm in Rutland, Vt. ‘Missing piece’This has been the “missing piece” in the renewable-energy revolution, says Venkat Srinivasan, director of the Energy Department’s Argonne Collaborative Center for Energy Storage Science. “It’s green energy, not fossil fuels,” says Josh Castonguay, the utility’s vice president of innovation.

Source: Wall Street Journal May 22, 2017 02:04 UTC