VEVOR 8KW Diesel Air Heater Muffler Diesel Heater 12V 8000W Diesel Parking Heater Remote Control Remote Control with LCD Switch for Car Bus Trucks Motorhome and Boats
The battery whose rated voltage is 12V battery like vehicle's one could generate the heater. For 1 gallon it may run for 10-25 hours depends on the working condition and power setting.