EV Battery Health Study: 2.3% Average Annual Degradation Rate Found in Analysis of 22,700+ Electric Vehicles
By
giuliomagnifico
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Summary
Geotab's 2025 analysis of over 22,700 electric vehicles reveals an average battery degradation rate of 2.3% per year, with high-power DC fast charging identified as the top risk factor for battery health. The study shows that most EV batteries retain significant capacity over time, with only 1.5% of vehicles experiencing severe degradation. The research provides data-driven insights into real-world EV battery performance and factors affecting longevity.
Key quotes
· 5 pulledOur 2025 analysis of over 22,700 electric vehicles, covering 21 different vehicle models, reveals an average battery degradation rate of 2.3% per year.
High-power DC fast charging is the top risk factor for battery health, with vehicles that frequently use DC fast charging showing higher degradation rates.
Only 1.5% of vehicles in our study experienced severe battery degradation, defined as capacity loss of 30% or more.
The data shows that most EV batteries retain significant capacity over time, with the average vehicle losing just 2.3% of its original capacity annually.
Proper battery management, including avoiding extreme temperatures and minimizing DC fast charging, can significantly extend battery life.
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