I just got back from the third visit to the local Tesla service center regarding phantom drain. They told me yet again that a mile an hour of loss of range is within limits. They said that engineering will refuse to look at the logs until I've reached at least a 5000 miles and performed a few drains of the battery down to 10% before charging back up to 90%. They said it all down to the battery needing to calibrated itself.
In between the second and third service center visit, I spoke with a mobile ranger [took 12 days to get a return call] who said that he can't help but the loss of range is not normal and that I needed to go to a service center.
It's pretty frustrating. I just returned from an eight-day trip where the car was garaged here in Southern California and I lost 110 miles of range while parked in a SoCal garage. I've got a 21-day trip coming up and I have no confidence that the battery will not be flat when I return. I've seen a loss as high as 1 mile per hour in the past so there was a slight improvement during the last trip where it was about 13 miles of loss a day.
One last thing, the mobile Ranger said that opening the app does not impact the battery in any measurable way. The consensus though it seems that it does. I'd love to have the official word from Tesla.
M3P+
In Southern California, this level of drain is not normal. This may be a case where your car is not going to sleep for some reason. Might be worth getting an app temporarily that can tell you what is going on in this case, on a trial basis, since the service center is not helpful.
Normal is 2-4 miles per day if battery does not need to be thermally managed. With our temperatures this is likely not a problem.
For watts - around 12W give or take is normal for sleep mode. (About mile per day.)
For idle it can be 150W or more (that is about 0.6 mi/hr) . The duration and frequency of idle periods has not been determined - I have seen data showing them to be as long as 5 hours in some cases. But that would result in a lot of vampire drain loss (at least 3 miles for a single such event).
So on average vehicles tend to get about 3-4 miles of drain per day, depending on how much they are in idle mode.
You should definitely work out a 1 mph drain problem if it is consistently occurring. As mentioned above, it appears that when idle mode engages for a long time, it is possible to see this level of drain for a short period. But not 24 miles per day! 13 miles per day is also not normal.
So if you really are seeing 24 miles per day loss, diagnose it yourself (probably Tesla won’t be able to) and then have them fix it.
If they tell you again it is normal at the service center, it is reasonable to be insistent that they are incorrect. Escalate to a manager. Maybe have them do a hard reset (I am not sure what that entails, but apparently some people have had it done for battery state of charge issues and it fixed things).
