Vance1965,
We also have our boat stored on trailer at our house. It’s great to have it so close and accessible.
In the cabin we run two Calframo air circulation fans, a True North heater set to automatically come on when temp drops below 38 degrees. Also have a Golden Rod heater in the engine compartment.
I’m typically on the boat several times each week off-season working in various upgrade projects and maintenance issues so I like to have the house battery on for interior lights, etc.
Our settings are:
o. For the big rotary switches we have engine, “emergency “ and thruster+windlass turned off and house rotary switch turned on.
o. For the DC panel I turn light switches on/off as needed.
o. On the AC panel we have the battery charger on and the appropriate AC outlets turned on to run the heaters and fans.
o. The solar controller is also turned on in the event of power failure or in the event a connection at pigtail comes loose. Obvious the solar won’t run the heaters and fans but it should keep the batteries full even in the winter.