I'm in NZ and we don't have the smartphone link. The 12v battery is 50ah and 420cca, so it is quite small and I was concerned about leaving the car unattended long term. On my previous 2016 PHEV the traction battery would charge the 12v at 2pm daily. I could not find anything on this with my new Gen4 model so I hooked up a battery monitor. I discharged the 12v battery to 11.8v (25% capacity), made sure I had a good amount in the traction battery (60% unplugged) then locked the car and did not use it for a couple of days. On the 2nd day at 0945hr the 12v got charged for 5 min @ 14.4v (50% capacity). At 1000hr on the 3rd day the 12v battery got charged again for about 5 minutes and again to 50% capacity.
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