AC Plug Port - BlackAC Plug Port for easy thru-hull AC Connection The Powermania AC Plug Port is designed to work with only Powermania chargers' AC plug. It provides a thru-hull AC connection between the charger and an AC extension cord. The installation does not require any cutting or stripping of the AC cord. The AC Plug Port's cover seals the AC plug from water and corrosion when it is not in use.