Leaving town for 3 months in Dec-Feb. Car will be outside during this time. Any advice that what should be done during this time period to reduce battery drain? How can I handle complete battery drain during this time and what needs to be done upon return to car. Thanks
You really should try to find a way to have it plugged in, but sounds like that's not an option. Failing that, there are recommendations here, which may or may not work.
So one thing you should do is TEST whatever you are going to do before you leave on your trip, for a couple days, to see what the rate is. This will make sure you don't have any surprises! If you lose 7 miles over 2 days you're likely going to have problems and your setup is not going to work. Ideally do a 4-day test and make sure you lose less than 8 miles (hopefully closer to 5-6). I realize this could be difficult to find the time to do...but at least try to do a check over a couple days.
Charge just to 90-95%, not 100%. If that extra 5% made a difference you're probably hosed anyway.
This is the list I have seen - I don't guarantee that they all matter, but it doesn't really hurt to do them, since you appear to be desperate. Mostly repeating what
@Perscitus said above.
1) Disable Sentry
2) Disable Summon Standby Mode (Shouldn't matter since you're at home, but be sure to turn it off)
3) Disable Cabin Overheat Protection (doesn't really matter but may as well)
4) Turn off the TeslaCam and remove the flash drive. Remove ALL USB devices.
5) Turn off Data Sharing (should disable Live Traffic - note you'll need to toggle it on again later)
6) Turn off WiFi - careful - it has a tendency to turn on again, so make sure it is off when you leave the car.
7) Pause music playback or select a non-existent source.
One key thing to add:
Note if you use an Apple device (maybe Android too - no idea),
you do NOT need to open the app to check on your vehicle range - use the widget for the Tesla App! It will show you 1) the miles, and 2) when the miles was last updated, and it
will not wake up the vehicle. I believe it updates whenever the car wakes up on its own, so it's kind of like using those as "free" checks.
Regarding the "deep sleep" below 20% - I haven't seen evidence of that - there was a recent case here where someone lost about 5% in 5 days, going from 20-15% (because they left Summon Standby on at the airport for a 12-day trip - so they lost a total of at least 45% over that time period - 7 days to get to 20%, followed by 5 days of drain from 20% to 15%). So that's not a deep sleep below 20%.