This is not a RV application but there seems to be a lot of solar knowledge on here so I thought I would ask. I run a 12V system in my remote cabin for LED lights and RV size water pump and CD play...
The OP didn't mention the security aspect. If you have a solar panel on the cabin will it be there when you get back in a couple weeks?
If we allow (dubious) that 230w and MPPT will be enough for a trickle charge in the deep woods, then a typical cost for that "up here" is about $260 for the panel plus tax and $110 for the Eco-Worthy 20amp MPPT.
So that is about $400 for this job, if it works and nobody steals the panel, instead of just taking the batts home between visits.
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