In the midday hours, prices plummet. An excess of energy produced across Texas, largely due to the state’s solar and wind fleet, signals it’s a good time to buy. It’s then that 500 batteries, which once fueled General Motors’ electric vehicles, charge up.  The batteries, now in their second careers, are kept in staggered steel … Continue reading Retired EV Batteries Scored a New Gig: Bolstering Texas’ Grid