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As far as I am aware after 8 years any degradation of the Model S battery pack from frequent Supercharging including any reduced capacity, throttling back when Supercharging has already happened. Why not just enjoy the Model S.
In general, for lithium batteries, it is better for the battery if you limit the maximum charging rate (also discharge rate) to 1C where C is the total capacity of the battery. Charging at much over 1C will stress the battery. This is a why an Urban Supercharger (72kW charging rate) although a bit slower than the V2 Supercharger (120 to 150kW) or V3 Supercharger (up to 250kW) is better for maximizing the life and health of the battery. That said, Tesla has very sophisticated battery management protocols in place when Supercharging a Tesla vehicle so you really can't do anything to hurt the battery by Supercharging. The worst that would happen is that Tesla will throttle back the maximum charging rate to probably where your Model S is at now.
Thanks, this is very helpful. Just to clarify, when you say total capacity, may I assume that is in miles? So in my case it would be 260 miles. But what does charging at 1C mean exactly? Does it equate to a speed of 260 miles per hour of charging?
Or is this not a function of miles, but rather of kWh or the like? I am a bit clueless in this respect, I am afraid.
In any event, when I supercharge, regardless of the total kW of the charging station, the car never charges faster than 75~80 kW or around 240 ~250 mph of charging. So I would think it is already taking care of the max 1C by itself, throttling back the max charge as you mentioned.
EDIT: OK, duh, I just realized that my battery capacity (in my P85+) would be 85kW, so I assume that would be C. Is that right? Since I have never seen my car charge actually charge at 85kW and is always less, I suppose I really have little if anything to worry about . . . . (Or have I not gotten the electrical units finally straight?)