The loss of capacity on our 2014 is a straight downward line that shows no sign of slowing down.
Over the last two years, it has been declining 0.15 kWh per 1,000 miles going from 15.8 kWh at 52,000 miles, down to 13.7 kWh at 66,000 miles.
If I assume a nominal usable capacity of 19 kWh that means the battery lost 27.7 %
If I assume a nominal usable capacity of 20 kWh that means the battery lost 31.5 %
Given I do about 7,000 miles a year with that car, I loose about 1.05 kWh per year.
If the nominal usable capacity is 19 kWh I should cross the 65% line at the end of the year at 71k miles
If the nominal usable capacity is 20 kWh I should cross the 65% line August next year at 75k miles
It will be interesting to see how that goes with GM
Has anyone ever been at a dealer for a battery degradation official estimate, and if so how much were you charge for it?