New analysis utilizing extensive driving and charging data suggests that the degradation rate of electric vehicle (EV) batteries is significantly better than consumer assumptions, and reveals that official EPA range ratings may not accurately reflect real-world performance, particularly for used car buyers.
Analysis of Battery Longevity
A company called Recurrent has aggregated data from over 50,000 electric vehicles, tracking performance over more than one billion miles. Based on this massive dataset, experts have observed that the battery health in EVs that are three to five years old shows minimal to no significant degradation.
The data suggests that while EV batteries do naturally age, the sophisticated internal systems—including thermal management, battery buffers, and control software—make this process fundamentally different from the rapid decline seen in devices like smartphone batteries. Scott Case, CEO of Recurrent, stated that batteries in this three-to-five-year age bracket are “holding up way better than anybody […] was expecting.” He further noted that most EVs in this age group are already utilizing their second or third generation of battery technology, making major issues quite rare.
Addressing EPA Range Inaccuracies
The data also challenges the reliability of standard EPA range ratings. Recurrent’s findings indicate that many EVs actually exceed their original predicted range years after they are purchased. Specifically, models from Hyundai and Kia have been identified as consistently delivering greater real-world range after three years compared to their initial estimates.
While Tesla vehicles are known to achieve approximately 90% of their EPA-rated range at the three-year mark, experts suggest this does not necessarily indicate battery wear. Instead, this gap is attributed to the original range estimates being more optimistic. The comparison advises used-EV shoppers to compare real-world performance data rather than merely comparing original EPA figures side-by-side, noting that a Tesla with a 320-mile EPA range might achieve around 280 miles three years later, whereas a Kia EV6 may start lower but maintain its range more consistently over time.
Improvements for Used EV Shoppers
To assist consumers, Recurrent is working with car dealers to embed real-world operational data directly into vehicle listings. This feature allows buyers to view the vehicle’s actual range, how that range fluctuates across different weather conditions, charging speed performance, and potential savings compared to gasoline vehicles.
Furthermore, the industry’s standard advertising of 20-to-80 percent charging times has been questioned as a useful metric. Instead, experts recommend focusing on the rate at which a vehicle can add 100 miles of range. While the average model in 2023 takes roughly 18 minutes to add 100 miles, many vehicles can achieve this in a significantly shorter time. Factors such as battery temperature, charging curves, efficiency, and charger output all influence how quickly useful range is recovered.
In summary, used EV buyers are advised that they should not anticipate battery degradation matching that of older personal electronics. The availability of Recurrent’s data on used EV listings will enable shoppers to evaluate a battery’s actual performance after prolonged use.
