Battery diagnostics firm Aviloo has published the largest long-term study of electric vehicle battery state of health (SOH), analyzing data from thousands of vehicles. The research shows that the best-performing models retain more than 92% of their original capacity after exceeding 100,000 kilometers, while others drop below 80% over the same distance.
Key factors driving these differences include sophisticated battery management system (BMS) strategies, efficient thermal management, and stable cell chemistry. Vehicles with active liquid cooling and adaptive charging algorithms consistently outperformed those with passive thermal designs. The study also highlights that frequent fast charging and deep discharges accelerate degradation, but robust BMS logic can mitigate much of this impact.
For commercial buyers, these findings are critical. Used EV valuation now has a data-driven foundation, reducing uncertainty in resale pricing and leasing residuals. Fleet operators can better forecast total cost of ownership, including battery replacement cycles and energy efficiency declines. Moreover, second-life battery applications—such as stationary storage—depend on accurate SOH data to assess remaining useful life.
This means that procurement decisions should prioritize vehicles with proven thermal management and advanced BMS, as these directly affect long-term operational costs and sustainability metrics. Suppliers and integrators can use this study to benchmark their own battery systems and communicate durability advantages to clients.
Source: Electrek, September 3, 2026.
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