Tesla Motors Club

I started building EV charging models a number of years ago and with the recent V3 Supercharger announcement finally felt compelled to update my Model 3 models. The results are included below. These are PRELIMINARY ESTIMATES based on the charging data seen at the V3 Beta demonstration on March 6th. I made a number of significant assumptions:

• The baseline V3 charge profile is based solely on this data from reddit user privaterbok.
• The usable battery capacities are 75, 62, 55, 50 kWh (LR, MR, SR+, SR respectively).
• The SR battery is a 92% software-locked version of the SR+ battery. The 8% buffer is all at the top of the battery. There is uncertainty about the SR battery configuration due to ambiguous comments made during the Model 3 announcement. It may actually have fewer cells than the SR+ and not be software-locked, in which case the SR results included here would be invalid.
• The V2 Superchargers are upgraded to allow 145 kW charging, increased from 120 kW today.
• The 145 kW V2 charging profiles assume they are power limited at 145 kW, not current limited at low SOC. It's possible that the power output will ramp up to a peak of 145 kW instead of the steady 145 kW output I modeled. If that is the case, the V2 results included here would overstate the actual capability.
• The charge profiles assume optimal charging conditions. This is more likely now if On-Route Battery Warmup is enabled to alleviate cold battery constraints. This also assumes the V2 Supercharger is used without sharing power.

Due to the four battery configurations and three types of Superchargers, the results have many permutations. So I made a lot of charts and grouped them in the following images:

Charging profiles based on battery configuration (Power vs Battery Level)


Charging duration based on battery configuration (Battery Level over Time)


Range gained over time based on Supercharger type (Rated Range over Time)


Charging profiles based on Supercharger type (Power vs Rated Range)


Finally, here's a bar graph that shows how many rated miles are gained when a 20 minute session is initiated at 15% battery level.



Initial thoughts:

• Much of the increased power from V3 is only accessible if the battery level is below 18%. This is where the 250kW and 1000 mphc specs are reported. During typical driving, most people don't plan to go that low; hence the actual benefits of the 250 kW V3 Supercharger are minor when compared to a V2 Supercharger upgraded to 145kW that is not being shared.
• Getting 75 rated miles in 5 minutes is only possible when starting the charge at a very low battery level (less than about 6%). This is also only possible in the LR RWD.
• There's very little to be gained by MR, SR+ and SR cars using V3, and then it's only possible when the battery level is below 20-30%. (Again, this ignores competing for V2 power sharing.)
• I believe the performance claims in the Tesla blog post. Those claims rely on fleet performance that, in addition to the V3 hardware, include the benefits from 1) On-Route Battery Warmup, 2) the software update to the V2 infrastructure and 3) the revision of Model 3 charging profiles to be more aggressive.

Comments and feedback welcome. Look for updated results down-thread as we get more information about the new Supercharger capability and the SR/SR+ batteries.

P.S. Please don't republish these results without my permission. They are preliminary and need to be validated by more real-world charging experience.