Used Waymo robotaxi batteries become backup storage for power grids - Ars Technica Skip to content Ars Technica home Sections Forum Subscribe Search AI Biz & IT Cars Culture Gaming Health Policy Science Security Space Tech Feature Reviews AI Biz & IT Cars Culture Gaming Health Policy Science Security Space Tech Forum Subscribe Story text Size Small Standard Large Width * Standard Wide Links Standard Orange * Subscribers only Learn more Pin to story Theme HyperLight Day & Night Dark System Search Sign In Sign in dialog... Sign in EV circle of life Used Waymo robotaxi batteries become backup storage for power grids Used Waymo batteries will bolster California and Texas energy storage projects. Jeremy Hsu – Jun 4, 2026 7:00 am | 69 At SEPV Sierra in Lancaster, California, 32 MWh of energy storage with 8MW of solar power supports the local grid. Credit: Awarded Goods Company At SEPV Sierra in Lancaster, California, 32 MWh of energy storage with 8MW of solar power supports the local grid. Credit: Awarded Goods Company Text settings Story text Size Small Standard Large Width * Standard Wide Links Standard Orange * Subscribers only Learn more Minimize to nav Thousands of electric vehicles in Waymo’s autonomous robotaxi fleet may eventually give up their used batteries for a very different purpose—contributing up to hundreds of megawatt-hours of stationary energy storage to local power grids. That prospect comes from a “strategic supply agreement” announced by Waymo and B2U Storage Solutions on June 4.
B2U has been repurposing thousands of used batteries from various electric vehicles by installing them in large stationary energy storage projects. Such energy storage facilities can capture excess renewable energy during low demand periods and release such energy when local power grids are experiencing peak demand periods. “Our business is getting the full residual value out of electric vehicle batteries after they’re no longer suitable for automotive use,” Freeman Hall , CEO of B2U Storage Solution, told Ars. “Waymo puts a lot of miles on EVs and their model is expanding rapidly, and so we’re just very pleased and honored to be able to work with them.” The agreement would allow B2U to repurpose Waymo batteries that become available at the end of a vehicle’s lifespan, along with obtaining used batteries that are being swapped out from operational vehicles.
Source: https://arstechnica.com/science/2026/06/used-waymo-robotaxi-batteries-become-backup-storage-for-power-grids/
B2U has been repurposing thousands of used batteries from various electric vehicles by installing them in large stationary energy storage projects. Such energy storage facilities can capture excess renewable energy during low demand periods and release such energy when local power grids are experiencing peak demand periods. “Our business is getting the full residual value out of electric vehicle batteries after they’re no longer suitable for automotive use,” Freeman Hall , CEO of B2U Storage Solution, told Ars. “Waymo puts a lot of miles on EVs and their model is expanding rapidly, and so we’re just very pleased and honored to be able to work with them.” The agreement would allow B2U to repurpose Waymo batteries that become available at the end of a vehicle’s lifespan, along with obtaining used batteries that are being swapped out from operational vehicles.
Source: https://arstechnica.com/science/2026/06/used-waymo-robotaxi-batteries-become-backup-storage-for-power-grids/