A persistent concern among some EV drivers is the long-term health of the battery.
All batteries lose some storage capacity over time. But how might that degradation affect your driving range a few years down the line? To help answer that question, we can now look to Geotab, a leading telematics-fleet-management company with access to a lot of EVs. Lo and behold, the losses are minor.
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Here’s a quick rundown of what the data revealed:
- If current degradation rates are maintained, the vast majority of batteries will outlast the usable life of the vehicle.
- The average decline in energy storage is 2.3% per year. For a 150-mile EV, you’re likely to lose 17 miles of accessible range after five years.
- EV batteries decline in a non-linear fashion. There’s an early drop, but the rate of decline slows down in subsequent years.
- Liquid-cooled batteries decline slower than air-cooled packs. Geotab saw that a 2015 Tesla Model S with liquid cooling had an average annual degradation rate of 2.3%, compared to an air-cooled 2015 Nissan Leaf’s rate of 4.2%.
Read more: Electrek
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