My EV (a leaf) has a built in DC-DC converter to power the 12 volt system and charge the 12 volt battery - it will supply a kilowatt when the car is turned on.

My EV (a leaf) has a built in DC-DC converter to power the 12 volt system and charge the 12 volt battery - it will supply a kilowatt when the car is turned on. In previous blackouts I have connected a kilowatt inverter to the car and used it to power stuff. It worked great and it was very useful.