I've been advised to keep a 12V battery tender connected to the 12V battery while I'm gone

[Rayburn]

I’ll be away for a few months during the winter and will leave my new EV6 in the garage. I plan to charge it to 80% using my Level 2 charger before I leave, but I’ll disconnect the charger once it's done. I’ve also been advised to keep a 12V battery tender connected to the 12V battery while I'm gone. Does this sound like the right approach? Any tips would be appreciated!

 

[Shannon_Sparks]

I've been using a battery tender for years already when I'm gonna sit my car for a bit. And I always disconnect the HV to 12V switch first. No problems ever since.

 

[InLoveWithEVs]

I charge it to 60% before disconnecting the L2. I don't know if that's better, but this is how I do it.