Yes, EV batteries can be repurposed for energy storage systems, with major projects launching in 2026. Used batteries that retain 70-80% of their original capacity are ideal for second-life applications in grid storage, where performance demands are less stringent than in vehicles.

Nissan and Renault are already repurposing Leaf and Zoe batteries at facilities in Japan and France, demonstrating commercial viability. These batteries typically cost 30-50% less than new grid storage units while delivering 8-12 years of additional service life.

How Are EV Batteries Repurposed for Energy Storage?

The repurposing process involves testing individual cells, removing degraded modules, and reconfiguring battery packs for stationary use. Companies like Connected Energy in the UK disassemble EV battery packs, test each module’s capacity, and rebuild them into containerized storage units. BMW’s plant in Leipzig operates a 700 kWh storage system using repurposed i3 batteries, proving the technology works at scale.

What Makes Used EV Batteries Suitable for Grid Storage?

Grid storage doesn’t require the power density or rapid charging capabilities needed in vehicles. A battery with 75% capacity remaining is inadequate for a 300-mile EV range but perfectly functional for smoothing renewable energy fluctuations. General Motors plans to deploy repurposed Ultium batteries in 2026 at multiple sites across Michigan, targeting 50 MW of storage capacity. The economics are compelling: repurposed batteries reduce storage costs from $350/kWh to approximately $150/kWh, according to MIT Energy Initiative research.