My boat has a single 230v/50amp shore power line. I would like to install an isolation transformer but it appears that the largest is 7,000 watts which is lower that the capacity of my shore power which would be 11,500. Am I thinking about this correctly?
I counted the watts on the units that I could be using at the same time and landed on a 3600W version (also on 230V AC). I made sure the capacity of the shore power was sufficient but don’t remember what it was, although I do not think mine can cope with 50 A.
Id say thats correct.
To increase power you could use two 7kVA transformers in parallel, but be aware that the same basic rules apply when paralleling transformers as they do when paralleling Multiplus/Quattros. The AC cabling should be the same between the two units or else the power distribution will not be adequately similar (it will never be perfectly 50/50 but shouldnt be 30/70 for example)