General voltage notes

  • 12V can be taken from the overhead map light box, labeled VBat in wiring diagram.
  • When driving or charging, voltage will be >12V
  • When parked voltage will be about 10V

Power connection

  • For a clean connection an inline harness could be used
  • I just soldered a wire to the VBat pin, Ground, and then have that going to a JST XH inline socket.

Car connector types, schematic, pinouts, etc can be found on: https://service.tesla.com/docs/Model3/ElectricalReference/prog-20/interactive/html/index.html?page=8&

The box is "Overhead console front".