@DrChaos This is the basics about calendar aging:
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Calendar aging ”eat” about 5% the first year for most people. It is quite temperature dependant but most people either can affect the ambient temperature or know about this part so to be tactical with the SOc is the only remaining option.
Calendar aging is worst in the begining but lessens with (about) the square root of time. If first year causes 5% you will not reach 10% until four years( square root of four = 2 —> doubled the first years aging after four years).
Worst case scenario for cyclic aging is that the battery holds upp for about 500-1000 cycles before the degradstion reaches 20%( thats the industry standard, so research tests use 20% degradation) if its used 100 to 0% each time.
Lets call that 750 cycles @ 350km =262.500 km, for a cyclic loss of 20%.
Most people do not use those full cycles so the battery wear is much less / cycle pr km driven.
The average car in sweden is driven about 12000km a year, so we are looking at about 1% (or much less) each year for a average driven car.
In average we probably have some 5% calendar aging the first year but less than 1% cyclic aging.