Rivian’s factory will soon be powered partly by old batteries from its own EVs

The new energy storage system will utilize batteries previously used in Rivian trucks and SUVs.

At its factory in Illinois, Rivian will soon use more than 100 retired EV batteries in an on-site power system that will help it save money on electric bills.

The electric automaker is one of the first customers of Redwood Materials’s new energy storage business, which takes old or discarded EV batteries—in this case, from Rivian’s own vehicles—and deploys them in a second life on the grid.

By making it possible to charge when........

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