I did not understand the question, but get a transfer panel, if one runs
everything now you are probably fine. Testing what you run with an amp
meter will let you know your loads, pumps and friges are all different
in load needs depending on size , surge load and run load info you need.

For 50$ I had a different muffler put on my Generac 7500EXL, now it is
not noisy, but I would rather have an inverter unit, as they are
superior in all respects except initial price.