It looks like brakes, water pump, furnace and refrigerator all use 12 volts.
If you are plugged in they will all run off AC converted to 12 volts.
The brakes have an emergency switch connected to a wire rope that you connect to the car. If the hitch ball and chains fail the wire rope connected to the car pulls the switch and the brakes lock in place to stop a runaway trailer.
You may also have an LP and Carbon Monoxide detector that runs on 12 volts.
If you are camping somewhere without power your battery will last maybe one night if you run the furnace a lot.
__________________
2017 SLX 195RB
2021 Jeep Grand Cherokee Summit L 5.7L V8
Andersen WDH hitch, Renogy 100 AH Lithium &
200 Watts solar panels from Renogy
Prev. '14 Jeep Grand Cherokee Overland, gas 3.6 V6
|