Great subject!
I would like to see an option to not heat the battery during short trips. I'd rather have an option to accept a reduced power limit.
i've recently averaged ~700 wH/mile for a 4.5 mile trip in 14F weather. And, this was just a 60kWh vehicle. That's equivalent to achieving 41 mpg. I estimated at least 1.8 kWh to heat the car for this short low speed trip (700wH/mile-300wH/mile)*4.5 miles = 1.8 kW. If you averaged four such thermal cycles per day, this would be equivalent to driving an extra 24 miles per day at the normal 300 wH/mile. I would expected that the 85 kWh folks might experience 42% greater energy to heat their batteries just scaling on battery cell weight (Equivalent to driving an extra 34 miles per day) ! Sure some of that goes to climate control, however heating a 900 lb battery likely takes far more energy than heating the air and upholstery of the interior. I love my Tesla, but this inefficiency must be fixed before widespread adoption in northern climates.
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I'm taking some time off and doing lots of short school dropoff/pickup runs in this cold weather, and my lifetime wH/mile is steadily climbing as a result. Not the kind of mileage I want to see. There is no point in heating the battery much for a 2-4 mile drive at 35mph max.