rrolsbe
Member
The Scan My Tesla android app shows the 12V battery voltage but only while the car is awake. When the car is awake, the DC-to-DC converter that charges the 12V battery is always active; likewise, when asleep, it is not active. The SMT app receives no data over the CAN bus when the car is asleep. Tesla must have a way to monitor the 12V AGM battery voltage while the car is sleeping otherwise how would they know when to wake up and top off the 12V battery? Since my car often stays awake for hours, it might simply wake up after X hours have transpired and not be monitoring the 12V voltage?