So, after getting the software update with the new Energy screen back in late October, whenever I get odd results, I try to take a screenshot.
Oct 29th:
Okay, 6.4%! Yikes, I had accidentally turned on Sentry mode at home, but interestingly, no other energy use.
Two days later, Oct 31, everything's optimal, but Standby is 3.9%!! My car is always plugged in.
Eventually, I decide that Standby are phantom losses that the car is topping up. The car loses 2%, the car tops up, then it loses 2% more, it tops up again, that sort of thing, so I stop stressing about it, though, usually the standby loss is 1.3% or less, except for 2 other times when I get 4.0% and 3.2%?!?
Nov 21, 4.2% due to app usage! Okay, so I log out of all my 3rd-party apps, Stats and Watch for Tesla, even though both state that they only access the car when the car's mobile app accesses the car, as iOS bundles requests together. Note, the Tip states Mobile App, that's Tesla's own app that could be doing this.
Dec 10, 5.1%, mostly Mobile app, which now is all Tesla's Mobile App. I'm thinking when I swipe to the right, to access widgets, my Tesla Mobile app widget must update, so I'm thinking I'll remove the Tesla widget.
Dec 15, a week ago. 10.4%!!! What? Okay, I was going skiing, so I accessed the car to pre-condition, 0.9%; but an additional 5.3% for Mobile App?
I'll keep testing. I think Vehicle Standby losses are just normal phantom drain losses due to cold ambient temps, and the car has to charge up to keep the car at the pre-set SOC. The Mobile App access, I need to keep testing by not using the Tesla app, until I figure this out. Maybe, I should log out, and re-install the app.