Recent insights from the UK are challenging long-held beliefs about electric vehicle (EV) battery longevity. Comprehensive data analysis suggests that EV batteries are proving more resilient than many had anticipated.
The London-based diagnostics firm, Generational, conducted an extensive evaluation of over 8,000 battery assessments from 36 car manufacturers. The findings reveal an average EV battery State of Health (SoH) at 95.15% of its initial capacity. These results span from brand-new cars to those over a decade old, with mileage varying from zero to above 160,000 miles.
Insights into EV Battery Condition
The data indicates that even as vehicles accumulate age and mileage, their battery health remains robust:
- Overall average State of Health: 95.15%
- 4-5-year-old EVs: median 93.53%
- 8-9-year-old EVs: median 85%
- High-mileage EVs (100,000+ miles): often between 88-95% SoH
Notably, even older models tend to surpass the typical manufacturer warranty, which often guarantees around 70% capacity after eight years or 100,000 miles. The dataset highlights a widening disparity in performance as cars age. In 4-5-year-old vehicles, the lowest performing quartile averaged 91.64% SoH, while the top quartile achieved 96.49%. For 8-12-year-old cars, the range was 82% to 90%.
The Role of Mileage in EV Battery Health
A significant observation from the study is that mileage isn’t the sole determinant of battery condition. Some newer, high-mileage vehicles outperform older, low-mileage ones. For instance, a 3-year-old EV with 90,000 miles might have a healthier battery compared to a 6-year-old vehicle with just 30,000 miles, emphasizing the impact of usage and charging habits over mileage alone.
Importance of Battery Transparency
Generational highlights the need for transparency in battery health as a critical factor affecting the used EV market. According to Philip Nothard, chair of the Vehicle Remarketing Association, “Transparency will prove crucial in building future consumer confidence and dispelling the many misconceptions that have gained currency around EV batteries.”
Implications for the EV Industry
The findings have far-reaching implications for various stakeholders. Automakers can leverage this data to emphasize battery durability and value retention. Insurers and warranty providers might adjust their offerings based on verified battery conditions, while fleet operators could optimize vehicle usage strategies. Policymakers could also benefit from standardized battery reporting to alleviate concerns about replacement costs, a significant barrier to EV adoption.
Electrek’s Perspective
The data supports the notion that many EV batteries will likely outlast the vehicles themselves. For example, Jamie Dow’s 2008 Tesla Roadster, still operating on its original battery after 18 years, retains about 80% of its original capacity. This example underscores the durability of modern EV batteries, as the report suggests.
The growing disparity between well-maintained and neglected batteries, however, highlights the importance of consistent battery health reporting. Standardized reporting could significantly reduce uncertainty in the secondhand EV market.
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Original Story at electrek.co