THIS STORY ORIGINALLY appeared on Grist and is part of the Climate Desk collaboration.
On a 20-acre parcel outside the tiny Southern California town of New Cuyama, a 1.5-megawatt solar farm uses the sun’s rays to slowly charge nearly 600 batteries in nearby cabinets. At night, when energy demand rises, that electricity is sent to the grid to power homes with clean energy.
To make renewable energy from intermittent sources like solar and wind available when it is most needed, it’s becoming more common to use batteries to store the power as it’s generated and transmit it later. But one thing about the Cuyama facility, which began operations this month, is less common: The batteries sending energy to the grid once powered electric vehicles.
The SEPV Cuyama facility, located about two hours northeast of Santa Barbara, is the second hybrid storage facility opened by B2U Storage Solutions. Its first facility, just outside Los Angeles, uses 1,300 retired batteries from Honda Clarity and Nissan Leaf EVs to store 28 megawatt-hours of power, enough to power about 9,500 homes.
The facilities are meant to prove the feasibility of giving EV batteries a second life as stationary storage before they are recycled. Doing so could increase the sustainability of the technology’s supply chain and reduce the need to mine critical minerals, while providing a cheaper way of building out grid-scale storage.