Yes in my "big picture" post #2, I failed to explicitly specify,
no inverters do any pass-through.
Of course, the fact **there is no** AC distribution on the boat
, that they would have access to on their input side, does imply that.
And it should perhaps also be mentioned that,
expensive / complex devices like combi charger/inverters have no more place in that KISS design, than do frequency converters.