A grid-storage unit in West Sussex, U.K., part of a project from Renault SA and Connected Energy using second-life EV batteries from Renault vehicles. Millions of electric vehicles will be scrapped in the coming years. For the batteries that power them, that won’t be the end of the road. Eventually, auto makers and recycling companies want to harvest valuable materials from old EV batteries to make new ones. But before they are recycled, used batteries could be given a second life on the electricity grid. Continue reading your article with a WSJ membership View Membership Options