I don't recall who provided this information, but someone said the 85kWh packs' 
charge rate can be roughly estimated by 100kW-SOC(%) (under ideal conditions: 
temperature, phase of the moon, you ate a proper breakfast, etc.).  So, if the 
battery is at 30%, you will charge at ~70kW.  I tested that equation in my 2013 
Model S, and I'm getting ~110kW-SOC(%), so I guess that's better than average.

Also interesting for those that are curious: 
https://insideevs.com/news/441801/old-85-kwh-tesla-reduced-charging/

Does anyone know of similar data for the other pack sizes?

Gary

-----Original Message-----
From: EV <ev-boun...@lists.evdl.org> On Behalf Of Willie via EV
Sent: Tuesday, May 23, 2023 10:16 AM
To: ev@lists.evdl.org
Cc: Willie <wmckem...@gmail.com>
Subject: Re: [EVDL] EVLN: Tesla wants to buy out your free supercharging


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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