Isolation Transformer for both 240V/50A and 120V/30A?

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pjtemplin

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Aug 9, 2020
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How do you use an isolation transformer in these two different situations, one where there are two hots (120V-0-120V split phase) and one where there's only one hot (120V-0)? I keep looking for a breakdown of how this works, and can't seem to figure out the right solution.


I'm dreaming of a boat with twin Victron Quattro inverter/chargers (in a 240V two-phase configuration 120V-0-120V), shore power on input 1 and generator on input 2. Set the shore power current limit to 45A on each when we're on 240V/50A, or 25A on the one when we're on 120V/30A. When we're on 120V/30A, the inverter can charge the batteries (and/or feed the other inverter) when its side of the loads draw <25A, and boost the power when those loads >25A. Do I just leverage two transformers "side-by-side" to handle the two phases?
 
I would install two transformers for 120V, 50 amps each, then you can do whatever you want. I'd bet any 240V 50 amp transformer is really just two 120V transformers in the same case anyway.
 
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