GM and Redwood Launch Second-Life EV Battery Energy Storage Project in Michigan

Why It Matters

The installation turns de‑commissioned EV packs into a cost‑saving, grid‑support asset, boosting manufacturing competitiveness while advancing a domestic circular‑economy model for batteries.

Key Takeaways

• 100 repurposed GM EV battery packs installed at Michigan plant.
• System provides 1.5 MW power and 7.2 MWh storage capacity.
• Expected to save over $3 million in electricity costs.
• Project completes GM‑Redwood full‑cycle partnership from scrap to recycling.
• Demonstrates domestic circular battery economy reducing reliance on new minerals.

Pulse Analysis

Second‑life battery projects are moving from pilot schemes to mainstream industrial solutions as the global EV fleet ages. Companies like Redwood Materials specialize in extracting value from retired packs, either by refurbishing them for stationary storage or by recycling critical minerals. The GM‑Redwood collaboration leverages this expertise, turning roughly 100 used Ultium modules into a grid‑scale asset at a Michigan assembly plant. This approach aligns with automakers’ sustainability targets and responds to growing demand from manufacturers and data centers for reliable, on‑site power.

The Michigan installation delivers 1.5 MW of dispatchable power and 7.2 MWh of stored energy, enough to offset peak‑demand charges and provide backup during outages. Redwood estimates the system will shave more than $3 million off the plant’s electricity expenses over its operational life, a tangible financial incentive for other manufacturers. By locating storage directly at the production line, GM reduces reliance on external grid capacity, smoothing load curves and easing stress on regional utilities. Such on‑site assets also improve resilience against price volatility in wholesale electricity markets.

Beyond the immediate cost savings, the project illustrates a viable pathway toward a fully domestic circular battery economy. By keeping used packs in the United States for repurposing before eventual material recovery, GM and Redwood minimize the need for imported raw minerals and reduce the carbon footprint of battery production. Policymakers are watching these deployments as potential models for incentivizing second‑life storage, especially as the Energy Transition Act encourages on‑site renewable integration. As more EVs retire, similar installations could become a standard component of industrial energy strategies.