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Supercharging Speeds: Who, what, where, why, and when

apacheguy

S Sig #255
Oct 21, 2012
5,083
1,243
So Cal
Supercharging speeds have improved dramatically over the past decade. The graph below provides some perspective. In order of descending charge rate: 2018 Model 3 LR (Blue), 2015 Model S 85 kWh (Black), 2012 Model S 85 kWh (Red)

1620351482306.png
 
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Tomilett

Member
Jun 21, 2018
36
57
UK
just for interest, this is my supercharging speed since mid-2018 when I started using TeslaFi. the bluer the dot, the longer ago it happened:
supercharge speeds.png

You can see pretty clearly that it used to hit 120kW and stay there to about 20%, then fell away pretty gradually all the way to 85%, before dropping steeply to 100%, now it still starts at 120kW (sometimes even 125, but it rockets down to 90kW by about 15% and then falls away gradually to 90%. I've removed all the datapoints where I was sharing, or the battery was cold etc. to get rid of the noise.
 

Tomilett

Member
Jun 21, 2018
36
57
UK
Also - working out supercharger speed versus software version gives me this (across the full charge range)
SoftwareAverage charging time increase against best
2018.26 3bbd9fd
1%​
2018.32.4 040c866
2%​
2018.34.1 3dd3072
4%​
2018.42.3 eb373a0
12%​
2018.46.2 8f8dc1b
10%​
2018.48.12.1 d6999f5
4%​
2019.4.2 6ed8818
2%​
2019.4.3 c63775a
5%​
2019.12.1.1 4b1dd29
4%​
2019.16.1.1 697c2ff
0%​
2019.20.1 9973c22
20%​
2019.20.4.2 66625e9
16%​
2019.28.2 320fba0
33%​
2019.32.2.1 9b8d6cd
36%​
2019.32.12.2 58f3b76
27%​
2019.32.12.3 1b89dd1
28%​
2019.40.2.3 40ef2d4d
38%​
2020.4.1 4a4ad401858
36%​
2020.24.6.11 3f98504
32%​
2020.48.12.1 3095698
37%​
2020.48.37.1 332984f
26%​
i.e. 2019.16.1 was the fastest charging I ever had, and although it looks like 2020.48.37 might be an improvement against where we have been for the last year, I'm not holding my breath as it might just be based on 2 relatively good charges. My supercharging has been relatively limited in the last year so not that much data to go on.
 

jpvdheijn

Member
Oct 30, 2018
559
441
Baarle-Nassau, NL
Very interesting the table you have created. The percentage increase are they based upon the best results of 2019.16.1? Is there also the factor environmental temperature here based upon your increases? That might give you a better comparison on charge times and environmental temperatures.
Helpfull chart!
 

Tomilett

Member
Jun 21, 2018
36
57
UK
Very interesting the table you have created. The percentage increase are they based upon the best results of 2019.16.1? Is there also the factor environmental temperature here based upon your increases? That might give you a better comparison on charge times and environmental temperatures.
Helpfull chart!
I don't think I have enough data to start using temperature as another variable for comparison, I don't do huge amounts of supercharging (only long trips) though pre-pandemic I was doing quite a lot of business miles. Supercharging is always mid-long journey though so battery is always running a good temperature.
 
Oct 10, 2019
319
158
So-Cal
Here is my SC chart for the last 2 years, 2014 P85D. it really annoys me the rate in which it drops off speed. It was before I started logging it 50%=72kW. now 50%=51kW it sucks ass.

Capture.JPG
 
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kavyboy

Active Member
Jan 13, 2016
1,236
2,081
Spring, TX
Here is my SC chart for the last 2 years, 2014 P85D. it really annoys me the rate in which it drops off speed. It was before I started logging it 50%=72kW. now 50%=51kW it sucks ass.

View attachment 666460
That's roughly what my speeds were like and how they changed. I haven't taken a road trip in quite a while, though, so I don't know how the real-world experience has changed. How much time is this adding to actual travel? Like, is the extra time more like "I guess I had time for an ice cream" or is it more like "I'm going to be a day late"?
 
Oct 10, 2019
319
158
So-Cal
That's roughly what my speeds were like and how they changed. I haven't taken a road trip in quite a while, though, so I don't know how the real-world experience has changed. How much time is this adding to actual travel? Like, is the extra time more like "I guess I had time for an ice cream" or is it more like "I'm going to be a day late"?
i have to add about 50% time. so if it says 20 min to leave i add an extra 10 min and its about right. I take a lot of road trips, I've drawn 18,000kW of SC and 21,000kW of home charging. I love that free for life SC :p
What i do now, if the option is available is stop more often for shorter times. I can take my dog for a walk in 15 min but taking the dog for a 45 min walk is a PITA especially now that its getting warmer and the 115f days are coming soon. With the shorter stops i am still taking the normal 8 hours to complete my trip. I did it once using the tesla nav SC method and it took me about 9.25 hours for the same trip.
Yes, when battery is warm SuC speed is roughly the opposite of the SoC so 10% = 90kW, 50% = 50kW, 90% = 10kW...
ALL the data points i have on that chart are with a warm battery and not on shared stalls and if it was on a urban charger i didn't collect the data point till the charge speed dropped to 70kW to maintain an accurate collection method. If i was driving in the cold or the extreme heat i would always check the data point to compare it with fair weather point to ensure the weather didn't play a role in the speed. and since the car does the on route warmup/cooldown for optimal SC speeds it seems to work quite well as charging in 20f was the same as charging in 110f and the same at 70f.
 

SmartElectric

Active Member
Jul 9, 2014
2,476
2,109
Toronto,Canada
Here is my SC chart for the last 2 years, 2014 P85D

FYI, your chart is similar to the formula:
kW (supercharging power) = 110-SOC%
rate that I have seen in most 2012-2014 cars and is the same curve as my 2013 Model S had from factory in 2013 and continues to operate at today.
Might be interesting to chart in that way, it will look more like a straight line, sometimes straight lines look nicer than slopes (I'm kidding).
 

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