What are the power requirements?
What is total amp draw of all systems and what are the motor starting amps?
This
If you can afford it have a Back up to the Back up Generator
I have a limited Solar system with (8) 200 amp hr Batteries with a 30 amp 120/240 Inverter that can be added on.
A 8750 watts Gas generator
A 12,000 watts Duel Fuel generator
And a Lincoln Vantage 400 Diesel welding machine that puts out 17,000 watts 220 3 phase and 11,500 watts 220/120 1 phase
My girl wanted me to get another one.
I told her we have enough for the time being.
Never run a generator at max out put. It will not last very long if you do so.