General Motors believes old Chevy Volt (and eventually, Bolt) batteries have a future as backup power sources for houses and buildings that use renewable energy. In fact, the company has repurposed five old Volt batteries to help power its data center in Milford, Michigan. They store energy generated by the center’s 74-kilowatt solar array and wind turbines, and then feed the surplus back to the Milford campus grid. GM senior manager Pablo Valencia said that’s possible, because the batteries retain 80 percent of their storage capacity, even after they’re no longer ideal for cars.
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https://www.engadget.com/2015/06/17/gm-chevy-volt-old-batteries/
