Put a battery disconnect on it and leave it disconnected. Been working for me now for two seasons.
I visit the camper about once a week or so (yeah I miss it if I don't--it can go longer like a month or so), connect the batteries (yeah I have disconnects on all the batteries) and fire everything up. Let everything run long enough to get to operating temperature (which can take some time in frigid February), shut it all down, disconnect all the batteries and button everything back up again.
|