According to the Bellevue SC they looked at the logs and traced this to a known issue with 5.8. They said the issue is that with shore-power battery pack warming (a new feature?) at times the contacts remain open and can drain the 12V battery. A fix is supposedly going to be pushed soon.
Additional Details
- They asked me to see if the car would go into drive.
- When I hit the brake pedal both consoles re-booted and then charging started. Not certain whether the re-boot was them or me.
- After charging completed the 12V alert went away.
- They told me that with the cold weather I should disable scheduled charging until the fix comes out. They told me the fix might be “silent” and not result in an alarm clock update notice.
- Plug in every day when I get home but use scheduled charging at 3am.
- I am currently on the 1.49.24 release.
- Drive 30 - 60 miles/day. Total miles ~1300.
- They told me the 12V didn't fully discharge and so is still healthy.
They told me the car was fine to drive. No issues on the commute.