The degradation that is calendar aging dependant, will follow this with the square root of time. The main part of degradation will come from this for the first 5-8 year of the batterys life.
View attachment 927483
At the same temperature (thinking, we can not easy lower the temperature) having the battery below ”the step” will cut the calendar aging in half.
10 months at 80-90% causes about 5% degradation.
10 months at 30-55% causes 2.5%
(Below 30%, even less)
In the long run, after ten years 80-90% degrades 17%
30-55% degrades 8.5%.
To this comes the self regenerating effect at low SOC that heals a part of the degrsdstion from cycling. How much, I can not say but the researchers do find the effect, specialky after fast charging etc.
So there is a small (?) extra win by using low SOC, resulting in even smaller degradation in total.
The cyclic degradation is also lower at low SOC, so this also refuce by half or so.
I live in a cold climate which is good (for this purpose), and my cars degradation is about 1/3 of the average for the same car.
This will most probably continue like this, snd after 10 yesrs I have 1/3 of the range loss compared to the average.
View attachment 927485