https://insideevs.com/news/799342/tesla-model-y-lfp-degradation/
They tend to degrade more early on, then the rate of capacity loss starts to slow down.
This was confirmed to me when I spoke to Voltest’s Davide Giacobbe, who drew from experience testing hundreds of high-mileage EVs, but there are also individual cases that seem to prove it. One is this three-year-old Tesla Model Y Standard Range, which has an LFP battery with cells supplied by CATL, with a capacity of around 60 kilowatt-hours.
Its current owner, Tom Scheiter from Germany, bought the Model Y about a year ago with around 34,000 miles (55,000 km) and had its battery tested. The result showed that 92% of the original capacity remained. Losing 8% capacity in two years is on the higher side of the degradation scale for an EV of this age, and it hints at the kind of life it had.
He recently tested the battery again, with the car’s odometer now reading around 49,700 miles (80,000 km). The car has done roughly 15,500 miles (25,000 km) in a year, and the test revealed the state of health was 91%, so it only lost 1% more.
https://insideevs.com/news/799560/ex-rental-tesla-batter-degraded/
Buying a rental car can be a gamble, regardless of what powers it, because people aren’t gentle with their rentals and cars can see a lot of abuse. This 2022 Tesla Model 3 Long Range Dual Motor owner picked up the car when it was two years old, but its rough life as a Hertz rental left it with just 80% of its original battery capacity when they bought it in 2024, with the odometer reading 122,000 miles.
The owner, Fast Forward EV, then measured the degradation of its NMC battery pack once a year. After the first year, the remaining capacity had gone down another 4% to 76%. Now, when the test was performed again in May—14 months after the previous one—the battery had only lost an additional 1%, showing a state of health of 75%, with just shy of 156,000 miles.