Redwood Materials is to recycle scrap and end-of-life EV batteries from US auto firm Rivian as part of an expanded partnership agreement.

This new scope of the partnership builds on existing work, announced in April 2026, which includes deploying 10MWh of battery energy storage from repurposed Rivian battery packs at the automaker’s Illinois plant.

Redwood, which announced the move on October 16, said it already collects used Rivian EV battery packs through the automaker’s nationwide network of service centres.

Redwood evaluates the battery packs for potential re-use in ESS systems used at Rivian’s manufacturing facilities or other locations, or for recycling. Redwood will now also recycle battery scrap generated by Rivian’s operations.

JB Straubel, Redwood founder and CEO, said every returned Rivian battery pack was a potential source of domestic grid energy storage in addition to critical materials.

“Redwood’s ability to integrate and redeploy Rivian batteries with our technology is an opportunity to enable fast, flexible and more cost-efficient energy storage. As the demand and cost for energy keeps rising, working with companies like Rivian is how we help meet these challenges.”

In October 2025, Redwood closed a $350 million funding round to accelerate the firm’s creation of a new generation of US-made energy storage systems.

Redwood has also signed a non-binding memorandum of understanding with General Motors to speed up deployment of ESS using both new US-manufactured batteries from GM and second-life battery packs from GM’s electric vehicles.

Batteries International reported earlier this year that former Tesla chief financial officer, Deepak Ahuja, was joining Redwood as CFO.