Model YL and UMC
I got my car about 3 weeks ago and primarily use the UMC to charge (15A tail)
The issue I am experiencing is that UMC will error out from scheduled charging. I took the car in with the UMC yesterday and Tesla confirmed both works fine individually but not together.
The SA indicated this is a “known bug” and hand waved it to either a firmware update or UMC gen3 ks going to fix this.
This is quite frustrating obviously because I schedule to charge at 11pm, and sometimes to find out in the morning that the car hasn’t charged at all is extremely frustrating.
I can’t reliably replicate the issue either. Some nights it would start completely fine no drama and sometimes it would just error out.
The only thing I can confirm is that once it’s in this state, UMC would not auto recover until I unplug from the wall side.
Are all YL owners experiencing this with UMC? I found one post from 2 months back that talked about a similar issue but I would think this is more prevalent if the SA is telling me this is a known issue. Thanks