We have an electric car with stereo sitting in my garage right now
Their running voltage is tipically 120v to 150v
then running a huge stepdown module, that charges once the motor is turned on, so it still has a small 12v batt, but only for the basics, and really only to turn the selector switch on and "prime" the motor
Its a giant breaker that sucks a metal bar in connecting the motor to its 120v, so quite dangerous lol