I live in Wisconsin where it gets COLD. I currently drive about 120 miles round trip daily. My garage at home stays fairly warm, so this question is directed more at the 10-12 hours that the car is cold-soaking while I'm at the office. I have the option to plug in (at 110v / 15a) at my office to “charge.” I don’t need to do this for range, but it certainly keeps me from getting to a lower SOC on the battery in this cold. As an added benefit the battery stays warmer so I have regen immediately instead of 20-30 miles into my commute home. Is there a temperature at which I definitely should be plugging in to protect the battery? Is it better to keep the battery warm and the SOC at a higher level (55%-95% standard mode, vs. dropping down to around 15% by the end of the commute if I don’t charge at the office)? Anything else I should know to keep the Roadster happy in this climate?