Should I power my heater with the starter battery or the auxiliary power system?

If you plan to use the heater over longer periods of time (i.e. overnight), we suggest you connect it to an auxiliary power supply. This will prevent the heater from draining your battery completely. If you do not intend to keep the heater running for longer than a few hours, connecting to the starter battery could also be an option, but we suggest using the auxiliary power supply, anyway.