My Tesla Model S used to lose about 25-30% in winter.Hello,
Have an 21 etron here in the Midwest. Over the summer, I was getting average efficiency if 3.5-3.8 miles/kw with AC on, now with colder weather(temps in the 20-40F range), efficiency has dropped to 2.0-2.5 miles/kw. That's almost a 40% drop! Is this typical? I'm trying to run the heat as little as possible since my garage keeps the car at 45F overnight. I heard preheating the cabin may help but doesn't this just use more electricity from the wall anyway? Not sure if overall it would be more efficient vs. no preheating.
I can’t speak for your eSUV, but from what I understand of my GT, preheating initially draws from the battery, at some point, the battery is replenished IF it is plugged in.