Yeah, this heat up effect is massive for around-town use. We have had below freezing weather for two weeks, which is very unusual here in Annapolis. That’s had a huge impact on my wife’s use case, which involves a bunch of 5-10 mile trips to drop the kids off at school, go on a grocery run, pick the kids up, take the kids to math tutoring, etc. She ran out of charge the other day during drop-off b/c the “37 miles left” we had the night before was actually a lot less than that accounting for warming the battery up the next day.
10kW is about 40 miles of range, as you figured out the hard way.