So I travel a lot, so I have a very consistent charging routine which gives me a good ability to track vampire drain.
Effectively, my airport parking lot has ChargePoint units installed. Unfortunately, there are four cars parked for every ChargePoint station, meaning 4 cars share 2 plugs. Since Teslas don’t lock the J1772, the staff routinely monitors the usage and unplugs my car after charging is complete (to 90%).
I don’t use Sentry mode when I park there because the stalls are huge and protected by poles and generally other EV drivers are courteous. Also, the drain with Sentry mode on is fairly significant. Given I typically charge when I arrive, I get unplugged within 12-24 hours and then my car sits.
For the last year, on V9, I’d routinely charge to 90% and even after two days unplugged, I’d arrive to a car that’s at 89%. However, since V10, my last two trips, I’ve been seeing huge losses. I was unplugged about 14 hours ago at 90%, and right now, I’m at 87% (first time I checked). I’ll update this post with more milestones, and I will only check the app every 6-8 hours:
Sentry off, cabin overheat off:
10/22/2019 - 808pm - Plugout = 90%
10/23/2019 - 955am = 87%
I did some monitoring at home last weekend with lower battery levels, and I didn’t see as drastic of changes, but I didn’t do very scientific testing, so it’s possible this is amplified at higher levels. I’ll do more testing and update this weekend. Other differences are my chareport is still open, not sure if maybe it’s keeping batteries warm because of that where as at home it wouldn’t be open. My home has Sentry blocked entirely, but the airport does not, I manually disable it shortly after parking via the app. Regardless, I didn’t have this problem before V10 (2019.32.12.2), and I park for multiple days at least 2-3 times per month.
Anyone else seeing similar things?
.. I've not worked out a way to automate the on/off process yet.
