Repurposing EV batteries for grid storage

Redwood Materials’ CTO explains the innovations and improving economics behind second-life batteries.

An episode of the Catalyst with Shayle Kann podcast, hosted by Latitude Media, titled "Repurposing EV batteries for grid storage" was published on July 24, 2025 and runs 27 minutes.

July 24, 2025 ·27m · Catalyst with Shayle Kann

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Summary

The job of an EV battery is unforgiving. If its performance slips too far — say, lost acceleration or range — it's probably off to the recycling heap. That’s even though it may have plenty of usable life, if only for something less demanding than powering a vehicle. Grid storage is theoretically a gentler job, involving slower discharging and more careful management. Still, repurposing isn’t easy. It requires dealing with a mishmash of various makes, models, and levels of quality. And it means competing against the falling price of new, purpose-built storage systems. But a few companies have said they’ve figured it out, including Redwood Materials, which supplied a second-life data center microgrid this year. So how does second-life storage on the grid actually work? In this episode, Shayle talks to Colin Campbell, chief technology officer of battery recycler Redwood Materials. Colin explains how, in just the past year, the company has found cost-effective ways to repurpose batteries before recycling them. Shayle and Colin cover topics like: What has changed to make repurposing profitable, including better software management and high-volume, low-cost supply Why, for Redwood, second-life batteries only need a short lifespan to be worth it Why second-life systems are especially well-suited for long-duration storage What it takes to compete with the falling prices of new LFP systems Resources: Latitude Media: Crusoe and Redwood Materials are powering a data center with old EV batteries Latitude Media: Millions of EV batteries could retire on solar farms Latitude Media: The challenging economics of battery recycling Credits: Hosted by Shayle Kann. Produced and edited by Daniel Woldorff. Original music and engineering by Sean Marquand. Stephen Lacey is executive editor. Catalyst is brought to you by Anza, a solar and energy storage development and procurement platform helping clients make optimal decisions, saving significant time, money, and reducing risk. Subscribers instantly access pricing, product, and supplier data. Learn more at go.anzarenewables.com/latitude. Catalyst is supported by EnergyHub. EnergyHub helps utilities build next-generation virtual power plants that unlock reliable flexibility at every level of the grid. See how EnergyHub helps unlock the power of flexibility at scale, and deliver more value through cross-DER dispatch with their leading Edge DERMS platform by visiting energyhub.com. Catalyst is brought to you by Antenna Group, the public relations and strategic marketing agency of choice for climate and energy leaders. If you're a startup, investor, or global corporation that's looking to tell your climate story, demonstrate your impact, or accelerate your growth, Antenna Group's team of industry insiders is ready to help. Learn more at antennagroup.com.