My boat doesn't have any power at present, although
I'll probably want to add that somewhere down the line. Since the marina has
shore power, it would be good to have an idea of how things connect up.

With such a small boat I wouldn't bother with this. Simply run an extension
cord for what you need. Ghost (My pearson 30) had a heavy duty cord that ran
right through a vent and that worked fine.
Alien has a pretty complex power system for such a small boat, but the inverter
was never installed.

RB