[camaraderie]

EDO...I am not understanding. What does the transformer "transform"? In the 220V countries I've been in...transformers are used to transform dockside 220V/50hz power into 110V/50hz power and are wired with a 30amp female marinco plug to allow you to run your 30A shorepower cord. Thus the Xantrex should see 110V power (50hz) and run just fine. Why would you be cutting power cords? Do you not have access to female marinco plugs?
I don't understand the wattage issue either as I've never heard of a 100 watt dockside transformer. All the dockside transformers in the Caribe are big heavy affairs capable of running air conditioning as well as other on board stuff, so maybe I am just thinking about this wrong!

Oh...and in any event...I'd get something at least 50% bigger than my continuous need to allow for losses and startup loads.