During the OTA the software that manages the DC to DC may be off for part of it so the 12v battery is on its own.i am new to teslas, so please correct me if i am wrong. if I understand correctly, the 12v is charged via a DC to DC off the high voltage pack. does this charge only happen when the car is "on" or does it happen whenever a set of parameters are met, eg, 12v below a certain voltage?
I created a whole thread on this. See the graphics where I use a tool to monitor the 12v directly on the battery post here:
The Tesla battery is an AGM deep cycle battery (ie. marine, etc usage). 12 Volt Battery Compendium – TeslaTap Look at graphics of the DC-DC converter charging voltage 1) before the install 2) during OTA install where the software for the DC-DC convert will be logically be "OFF" and the 12v is...