"We do see variation across different vehicles and models," continues Argue. There are other factors as well. "So far, we haven't seen a significant impact from high mileage on degradation rates, so you shouldn't be afraid to use your EV." This finding is in line with P3's research.
"But we have seen a correlation with the frequency of DC rapid charging," warns Argue. "Cars that frequently rapid-charged did have an observable increase in degradation rates." Hot weather is also a factor that affects durability.
"When the electric vehicle market started, there was a large concern around the factors that can lead to increased battery degradation," says Neil Cawse, CEO of Geotab. "But battery tech has gotten much better, particularly around management systems-for example, making sure that lithium-ion cells charge properly when cold."
"You still generally have warranties that promise 70 percent state of health at eight years, but the degradation that we're seeing on those batteries is much less," says Wallace.
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