I own one also (model 3) and regularly make ~400 mile (646 kms) trips at highway speeds and only have to charge for a total of 30 minutes. I usually stop twice

I own one also (model 3) and regularly make ~400 mile (646 kms) trips at highway speeds and only have to charge for a total of 30 minutes. I usually stop twice to charge the lower end my battery but even if I need to stop once it is 35 minutes.