Been driving mine for nearly a month now, and no 12V issues at all! At home, I’ve got my EV9 connected to a Level 1 charger while waiting to get my 240V setup installed. Yeah, it’s not speedy, but it gets the job done for now!
I’m not sure, but it might depend on your trim level or region. You should check with your dealer to see if there’s a trial or if it’s part of a package.