I have read many posts regarding using a battery tender/smart charger to maintain the 12V battery on the Model S but has anyone had any success doing this on a Model 3? I instrumented my Model 3 and tried to get my NOCO G7200 to keep the 12V AGM battery topped off. I tried several settings over a 14 day period and could never get the G7200 to top off or maintain the 12V battery. The phantom drain was still around 4 miles a day over this test period (ie.. no change). I monitored the G7200 charger power usage over the 14 day test period using a Kill-O-Watt meter (almost no power used). While sleeping, the Model 3 seems to draw around 0.5 to 0.6A from the 12V battery. Does anyone have statistics on what average power draw is while the Model 3 is sleeping? If accurate, that would be less than about 8W average but would need to supply approx 1KW of power from the wall to replace that 12V power draw (that is around 42W). If interested, I can supply more details about my experiment. There has to be something slightly different with the 12V AGM battery top off charging logic on the Model 3?
Regards, Ron
PS - The car was not driven and the Gen 2 UMC charger was not plugged in during the 14 day experiment.
Regards, Ron
PS - The car was not driven and the Gen 2 UMC charger was not plugged in during the 14 day experiment.
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