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IIUC, Ultium is 400V in operation and only switches to 800V while charging on 800V units. This sounds a little different. It operates at 800V and switches to 4
by _ea1k 3y ago
IIUC, Ultium is 400V in operation and only switches to 800V while charging on 800V units.
This sounds a little different. It operates at 800V and switches to 400V for charging.
I think that will simplify things and hopefully avoid Ultium's weird glitches during charging.
- stetrain 3y agoPresumably it can charge either at 400V or 800V depending on the charger it's plugged into. But I think you're right, Ultium is still a 400V drive architecture versus this being an 800V drive architecture.
- _ea1k 3y agoTrue, I left out that part. :) TBH, I'm really looking forward to seeing the Tesla tested on 800V CCS chargers via the adapter. It seems like it is at least possible that it might charge faster on those than on the current 400V superchargers. Of course, that would change if Tesla starts enabling 800V support on V3/V4.
- stetrain 3y agoIn the Top Gear interview they confirmed the truck can do 350kW charging on a V4 charger, 15-85% in 18-20 minutes. https://www.youtube.com/watch?v=uefydJUbRhc https://www.youtube.com/watch?v=uefydJUbRhc @ 34min
- _ea1k 3y agoYeah, I saw that, but tbh, I'm taking it with a grain of salt at this point. We've already seen one screenshot of the charge rate at ~70% and it wasn't great. It was showing ~10 minutes remaining to get to 80% too. That was on a slower charger, but the charge rate was less than 80 KW. Considering how bad the 4680 Model Y was, I'm not optimistic.