Cottonwood
Roadster#433, Model S#S37
Yesterday, we got the first good winter temps of the season in Boulder. I was at a concert for about 3 hours and the MS had a chance to cold soak outside in temperatures dropping from 20˚F to 17˚F over those 3 hours. I had plenty of charge, a short drive home, and luckily remembered to turn on the climate control with the App. 45 min before I got to the car, I set the interior temp to 79˚F, and then recycled it at 20 minutes before getting to the car. (the climate control times out at 30 min) As I walked down the street to my MS, it stood out dramatically with water drop covered windows while all the other cars had their 3/4" of fluffy snow dust covering them. I got into a nicely warmed car, but to my surprise the regen was limited to 30 kW.
In this example of ~18˚, 3 hour cold soak with a 45 min warm up, the battery was not up to full operating temps. It may have warmed up some or just did not get that cold, because there was no motive power limit that I saw on cold, overnight soaks last year. Given the slippery roads and in town driving, the 30kW regen limit was barely noticeable.
In this example of ~18˚, 3 hour cold soak with a 45 min warm up, the battery was not up to full operating temps. It may have warmed up some or just did not get that cold, because there was no motive power limit that I saw on cold, overnight soaks last year. Given the slippery roads and in town driving, the 30kW regen limit was barely noticeable.