Originally Posted by gbrown
Actually, this does not matter. As long as the thermostat has batteries to run the circuit, you are only switching the 12 or 24 volt circuits. And a circuit that can switch a 24v load can certainly switch a 12 volt load (amperage being equal).
my understanding of the wiring diagram is the battery's you talk about
only run the thermostat memory. the house battery's run the the circuit. my diagram shows it is a 12v circuit, no transformer. you are right that a 12v thermostat should work . my last motorhome was a 110 transformer reduced to 12v circuit just like a house . that's why I always look twice at voltage ratting