We took a trip to Sioux Falls this last weekend. We stayed at a friend's house overnight so the Truck was parked outside without being plugged in. We arrived at 6 PM and we departed the next morning at 8 AM. Outside temperature was 0F and very little wind. During the night the truck used 32 miles of range due to the cold. Next cold test I plan to plug into a simple 120v outlet and see how my range is affected. I see now why the truck tells you to plug in when it is cold outside.