Even on the coldest night of the year I have never come close to the stated amount of time to re-charge the car. I’ve arrived home with 4 miles and by the next morning (less than 14 hours later) been back up to 80%. I had noticed that the first cold night or two it seemed to take longer but that was not true last night. The stated time to re-charge was 18 hours when I came home. 12 hours later I was back to 80% and ready to go. Maybe it’s having a dedicated 110 line that helps.