There's no mechanism for this specifically because shipboard MWe is so measly. If the ship did have significant MWe capability you would have no way to get it

There's no mechanism for this specifically because shipboard MWe is so measly. If the ship did have significant MWe capability you would have no way to get it shoreside, the shore power cables would burn. In availabilities where significant shore power is required (>800 Amps), sets of cables have to be welded directly to busbars because the sockets can't handle it. So you've got 360kW (800A * 450V) that the average plant can deliver. The typical estimation is 10kW per home, so 36 homes from one naval plant.