Planning for the future: 12V battery dies

[brkaus]

If the 12V goes dead and you can gain access to vehicle using external 12V battery, is the vehicle drivable after disconnecting the external battery?

The vehicle is typically drive able once it is “started” with a battery booster and the DC2DC converter starts operating.

 

[jcanoe]

If the 12V goes dead and you can gain access to vehicle using external 12V battery, is the vehicle drivable after disconnecting the external battery?

Good question. It would depend on what was wrong with the 12V battery. If the 12V just stopped holding a charge then once you were able to boot up the Tesla it should be driveable. (There was a post I read that that stated that not all of the Tesla's 12V systems were able to function after getting a Tesla with a bad 12V running by using a jump starter battery pack.) If the 12V battery has a dead short in one of the battery cells this might prevent the 12V system from functioning. An open cell in the 12V battery would just drop the voltage of the 12V battery from12.6V down to below 10 volts. Once you park the Tesla you would probably have to use the jump starter to get the Tesla running again. Leaving the hood unlatched would be a good idea until the 12V could be replaced.