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Single Quattro for one side of split phase

Would it be feasible to add a single Quattro or Multiplus (not the 2x120v) to provide one half of a 240V split phase (North America 120/240V residential power) while taking the other phase directly from my main panel and passing it through along side?

I’d like backup/UPS for the equipment but would move lighting to the non-inverter phase. I’d also like to add a 30A 240V that wouldn’t be powered during utility outages (for car charger or brewing setup, I guess this is the trickiest part, and I could skip it).

Is there a reason it would be inadvisable to use an inverter on only one phase? If it’s okay, what extra considerations should I make?

Phoenix Invertersplit phase
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