GM taps EV batteries to stabilize grid against AI's energy demand

General Motors today announced a suite of initiatives to leverage its EV fleet as a buffer against surging electricity demand from AI data centers. At a San Francisco event, GM revealed it will activate vehicle-to-grid (V2G) capabilities for existing customers through a firmware update, turning bidirectional-capable EVs into mobile energy storage units. The automaker also unveiled a new commercial energy storage system built around proprietary sodium-ion batteries for industrial-scale grid applications. With over 250,000 bidirectional-capable Chevy, Cadillac, and GMC EVs currently on American roads, GM calculates their combined battery capacity could power 120,000 homes for up to a week. The company is already testing this theory: in Northern California, a partnership with PG&E aims to build a localized fleet of 52,000 EVs for grid balancing by 2030; in Michigan, GM is working with DTE Energy to stress-test bidirectional charging using 30 employee homes.

Enabling V2G at scale, however, requires more than just technology. GM Energy VP Wade Sheffer published an open letter urging regulators to formalize V2G infrastructure, citing International Energy Agency reports that identify V2G as the tech with the largest hourly flexibility to limit future grid investment costs. Sheffer stressed the need for public education and simplified utility enrollment. GM’s chief product officer Sterling Anderson noted that injecting flexibility into a historically rigid system could lower aggregate energy costs, create a potential financial return for consumers, and enhance grid reliability. As AI data centers continue to push electricity demand, GM is betting that its EV batteries—idle in driveways most of the day—can become a critical asset for both utilities and owners.