On 5/22/23 23:30, Josh Landess via EV wrote:
Thanks, I guess it is somewhat useful to be reminded of this. In the
meantime:
- I spoke to a fellow Model S 70 driver at a supercharger this past
weekend who said that the 70s were well-known for particularly slow
charging, but that he was happy (I'm understating his wording) in that
his very slow-charging battery had gone bad and Tesla had replaced it
under warranty with a 90 (they don't make 70 any more) that they had
locked to 70. The net impact was that his supercharging rate was
dramatically improved (about 2x as fast he said). He was of the view
that he is being forced to just charge in the sweet spot of the 90,
and this is why it is so fast. I think he said the minimum he has
seen is 80 kW. This leaves open a question of: if I pay for a battery
upgrade to 90, would it also be that fast. But, in any event, I think
this one conversation seems valuable to assure me that it can be done
(to get the faster speeds) even if Tesla for some bizarre reason will
not ensure it, and I'm not certain of it. I also think it reduces my
concern that Tesla might be making the 70s slow in order to incent
trading in a vehicle equipped with the valuable free supercharging.
- The speeds themselves that I am seeing are simply unacceptable. When
I combine them with the small capacity, the vehicle I have is nearly
un-usable for long road trips. It was really refreshing to be able to
discuss this with a fellow driver.
You may not be aware of the history of the smaller batteries. Phil will
be the authority on the subject. 40kwh, 60kwh, and 70kwh were offered
at various times. "Large" batteries were 85kwh, 90 kwh, and 100 kwh.
In some, perhaps all, cases, the smaller batteries were the same as the
larger but with software limits on use of the capacities. I don't
believe 40wkh were ever delivered; I think they substituted software
limited "60 kwh". There is a benefit to the "smaller" batteries: the
charge rate does not much taper as full capacity is approached and you
can charge to full (limited) capacity without fear of damage or life
reduction. After the sales, "small" batteries could be unlocked, for a
fee, and made to behave as the large batteries.
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