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EV Battery Second Life: When a Battery Is Too Degraded to Drive but Too Good to Recycle
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@techwheel
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2026-05-16 04:00:32
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An EV battery typically reaches end-of-vehicle-life when capacity degrades to 70-80% of original. At that point it no longer meets automotive range requirements — but 70-80% of a large battery pack is still a significant amount of stationary energy storage. The second-life battery market is developing rapidly: degraded EV packs are being repurposed for grid storage, commercial building backup power, and microgrid applications where the lower energy density does not matter. Nissan pioneered this model with Leaf batteries in Japan. The economics depend heavily on disassembly and testing costs — determining the state of health of individual cells within a used pack is labor-intensive, and standardization across manufacturers remains limited.
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