Lots of factors to consider. Including having a cutout switch to chop ALL LOADS. Does your cabin see shade during summer or winter? How cold it gets. How to know FOR SURE the batteries are 101% charged BEFORE you leave the cabin. Theft resistance of the solar panels. Panels for 12-volts are EXPENSIVE. Unless you buy cheaper panels for an EXPENSIVE MPPT controller. Sizing the charger AMPERES correctly to fit your generator AND your battery bank size.
Those are some of the 1st questions to resolve. They have to be answered right off the bat.
