Is a 10% battery range reduction normal for a 2 yearl old m3 + with 27k?.
it seems awful fast considering it has only 27k..
The most part of the degradation comes from time alone.
The miles doesnt cause much degradation for most cars. You need to drive very much with very larege cycles to get that to be noticable.
Time alone= Calendar aging. It is affected by the time (of course) but also the temperature and the SOC, state of charge.
The lover temperature, the better.
The lower SOC the better.
Calendar aging reduces with the square root of time, so the degradation you have after 2 years will take about 8 years in total to double.
If you are at 10% today, you might hit 20% when the car is eight years and looses the warranty.
Long range cars in US use the NCA chemistry.
If you charge to 70-90% you can expect about 5.5-6% degradation in the first year in a normal, not cold environment.
Vancouver isnt that hot, is it? What SOC do you charge to in general, and at what time on the day do you charge?
If you have 5.5-6% the first year it would take you about 3 years to reach 10% calendar aging.
As your car hasnt very many miles on it, I’d say the cyclic aging is very low, like 1 % or so in total or less.
