Here is a confirmed issue with the 2025 GV60 and has now happened to us twice in the last two months, with less than 2k on the odo, and a vehicle that came off the delivery truck only a couple days before we bought it. The "12V battery drain after charge".
1. Plug car into home L2 charger under scheduled charging, set to begin at an appointed time per vehicle and app settings to take advantage of off-peak electric rates
2. Vehicle charges to set charging state - for us, 90% for AC charging.
3. Next morning - vehicle is dead. 12V AGM battery is completely flat. Requires a jump.
4. No DTCs, no status in the app, nothing - everything is clean and green, no issues reported.
5. After jumping vehicle, vehicle indicates 92% SoC, rather than app-limited 90% SoC.
The dealer tried to blame it on us ("maybe you didn't shut it off," "you have to lock the doors when charging"). This is the second time this issue has occurred, and after trying to condition the battery, my battery conditioner tells me "bad bat" and it won't charge past 6V. Others have reported a similar issue.
Service appointment imminent.