Waymo’s spent Robotaxi batteries to be repurposed as grid storage in Texas and California

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Waymo’s spent Robotaxi batteries to be repurposed as grid storage in Texas and California

Alphabet-owned autonomous driving company Waymo is moving into energy infrastructure with a new program that repurposes retired robotaxi batteries into grid-scale energy storage systems across Texas and California. The initiative marks one of the first large-scale efforts to give second life use cases to electric vehicle batteries specifically designed for autonomous fleets, signaling a broader convergence between transportation and energy systems.

Turning robotaxi fleets into energy assets

Waymo’s fully electric autonomous vehicles rely on high-capacity lithium-ion battery packs that are regularly cycled through intensive urban driving conditions. Over time, these batteries lose efficiency for vehicle use but still retain significant storage capacity.

Instead of sending these batteries for recycling or disposal, Waymo plans to channel them into stationary storage systems that can help stabilize electricity grids during peak demand periods. The company says the approach could extend the useful life of battery packs by several years while reducing waste from large-scale autonomous vehicle fleets.

Deployment across Texas and California

The first deployments are expected in Texas and California, two of the largest renewable energy markets in the United States.

Texas, with its rapidly expanding wind and solar generation, often faces grid volatility due to fluctuating supply and demand. California, meanwhile, continues to grapple with peak-hour energy shortages and wildfire-related grid disruptions.

Waymo’s repurposed batteries will be used to store excess renewable energy during off-peak hours and release it back into the grid when demand spikes, effectively acting as distributed energy buffers.

The project arrives as electricity grids in the U.S. and globally face increasing strain from electrification, data center expansion, and renewable energy variability. Energy storage is widely seen as a critical component of modernizing power infrastructure, enabling utilities to smooth out fluctuations and reduce reliance on fossil-fuel peaker plants.

Looking forward

Waymo has increasingly positioned itself as part of the broader clean transportation ecosystem, operating fully electric autonomous fleets in multiple U.S. cities. Repurposing batteries aligns with industry-wide efforts to reduce lifecycle emissions and improve sustainability metrics for electric mobility systems. Analysts say such initiatives may become standard practice for autonomous fleets as companies scale to tens of thousands of vehicles over the next decade.