One should not expect supercharging speeds approaching 200 kW, unless:
- the SoC is below 20-25%
- the battery has preconditioned to ideal temps prior to arrival using the navigate to supercharger function
- outdoor air temps are warm enough (above 50-60F is my guess)
Even when you do reach speeds approaching 200 kW, it will only last for a minute or two and will quickly begin to throttle. I can also confirm that cool outdoor air temperatures can prevent full 250 kW charging, even if you navigate to the supercharger. It doesn’t matter how hard you try to arrive with ideal cell temperatures and SoC, the battery won’t be warm enough for the fastest charge speeds when outdoor air temps are not warm enough.