thanks again for all your answers and suggestions, but my question wasn't "how to do it?", my question was only about a "good spot to place the shore power inlet" in my boat, after that, I know everything I have to do, I don't want to pace the inlet in a place which I regret tomorrow.
definitely the solar panels could be a good consideration because I'm in Florida, my boat is usually out of the water but not at home, I will check on it, the only thing is, if I install a very simple AC power system, not only could be useful for battery charger.