EV Battery Health: Key Findings from 22,700 Vehicle Data Analysis | Geotab

Geotab's 2025 analysis of over 22,700 electric vehicles reveals an average battery degradation rate of 2.3% per year. The study highlights that high-power DC fast charging is the top risk factor for battery degradation, with frequent use of such chargers leading to faster capacity loss. The analysis also found that operating in hot climates and frequent exposure to extreme states of charge (below 20% or above 80%) can accelerate degradation. However, moderate exposure to extreme SOC levels does not significantly affect battery health. The study emphasizes the importance of strategic charging practices to maximize battery lifespan and fleet ROI.