I have to leave my car unplugged in an unconditioned underground garage for 13 days. The car only seems to lose a couple miles at night and will have a 90% charge when I leave it. The car will not have 3G or Wifi access during this time. Asking someone to check on it/take it out and charge it/etc is not an option. My car makes the loud double click sound when you open the doors - I was told that means it is engaging the high voltage battery. I was told that this is a new feature so maybe the video Bjørn has on his YT of leaving the car unplugged for 25+ days at the airport wouldn't apply here? Does that mean while the car is sitting it will be draining the regular 12v battery? Will it take too much energy from that battery and make it so I can't start the car? Any suggestions? I will have to do this for 30 days this winter, so this will be a good test I guess. When I have done that with my old vehicle, I would unhook the battery so it wouldn't get drained (learned by not doing that one winter and came back to a dead battery. Disconnected the same battery the next winter and came back to no issues).