For the past several days it's been extremely cold here in Maryland, with temps overnight in the teens and in the 20s during the day. My car sat outside for several days with only short drives of less five miles or so. Having not encountered this before I wan't aware of cold weather charging issues. If only I had looked them up on TMC. For the past two evenings the car wouldn't accept a charge. I worked with Tesla service to determine a fix and nothing seemed to work (resetting the UMC, powering the car off, leaving the climate control running, etc.) I thought the car would need to go into service for a fix. Today the car was inside all day as the new higher res front and rear cameras were being installed, so the battery pack warmed up. When I got home and plugged in the car it started charging immediately at normal rates. Lesson learned? When the battery gets too cold it will not charge. If it gets cold enough turning on the climate control is not sufficient to heat it up to charging levels. And one cannot keep the climate controls on long enough to heat the battery to sufficient levels. A conundrum for sure. What do owners in much colder climes that Maryland do to keep the battery sufficiently warm to charge?