The main thing to know is that you want the car “on” when using the inverter, so that it will continue to charge the 12V battery. If you simply “start” the car, it will stay on for 2 hours. If you want it to stay on for longer, get in and don’t close the drivers door. Press start, then put the car in neutral. Set the parking brake. Get out and close the door. It will stay on indefinitely. Remove the fuse for the pedestrian alert if the sound bothers you.