The bigger the battery, the less hot it gets when you load it. In other words if you have a battery that goes 30 miles and you put a 100 amp on it to accelerate, that's alot harder than a battery that goes 10 times further or is 11 times bigger (300 miles or 85KW) with the same 100 amp load.
That's #1, #2 is that Tesla in general tells you not to charge up to 100% to prolong battery life unless you need it for a trip. You can set their cars to charge to 80%, Ford will go to 100 if you plug it in and forget it. True 100% Ford is not 100% on the battery, probably neither is Tesla's, but any charge level lower than another is better for the battery. You want to store you car with the battery not full, the lower the better as sitting time is concerned.
#3, it may be possible, but I'm not sure, that Tesla can manipulate the charge settings as the battery gets older. For example, when brand new maybe they only charge the pack to 4v per cell, but as time goes on and battery age goes up, they can slowly increase the charge level to 4.01, 4.02, 4.05, 4.10 and make it seem like the battery still has the same capacity as initially you never used the full potential of the pack. Don't quote me on this, its an idea I have that may or may not be true.
Edited by rbort, 17 April 2018 - 07:20 AM.