The world of electric vehicles (EVs) is a competitive arena, with brands constantly vying for dominance. While Tesla, Audi, and BMW are household names, a recent study by a Swedish used EV marketplace, Carla, reveals some surprising findings about battery degradation. The study analyzed data from 9,954 battery health tests conducted between 2022 and 2026, focusing on models that retained the highest capacity after 62,000 miles. The results may challenge common perceptions about EV battery life.
The top three performers were all from South Korea: the Kia e-Niro, Hyundai Kona, and Kia EV6. These models maintained an impressive 97% or higher battery capacity after 62,000 miles. This is a significant finding, as it suggests that these South Korean brands have mastered the art of battery longevity. While Tesla made appearances on the list, with four of its models featured, the results indicate that other brands may be better suited for those concerned about battery degradation.
The study also highlights the importance of battery chemistry. The Kia e-Niro and Hyundai Kona, both equipped with 64kWh batteries, achieved the highest capacity retention. This suggests that battery chemistry plays a crucial role in determining longevity. Additionally, the study found that models with CATL batteries tended to perform better, with the Volvo XC40 Recharger and Polestar 2 achieving high capacity retention. This further emphasizes the significance of battery chemistry in EV performance.
One of the most intriguing findings was the relatively high capacity retention in the lower-ranked models. Even the last-place car, with 91.7% battery capacity, still performed reasonably well. This challenges the notion that EV batteries are inherently prone to rapid degradation. The study's results suggest that, while some EVs may experience more significant degradation, others can maintain a high level of capacity over extended mileage.
This study adds to a growing body of research that contradicts the common belief that EV batteries degrade rapidly. Another Swedish study found that eight out of 10 used electric cars would retain more than 90% of their battery capacity. These findings are a welcome development for EV buyers, as they alleviate concerns about battery health and longevity. As the EV market continues to evolve, it is essential to consider these studies when making purchasing decisions.
In conclusion, this study highlights the importance of battery chemistry and brand in determining EV battery longevity. While some brands may excel in this area, others may fall short. The results also challenge the notion that EV batteries are inherently prone to rapid degradation, offering a more optimistic outlook for those considering an EV purchase. As the market expands, it is crucial to consider these findings when evaluating different EV models.
