Still need help with this??
It will come down to the amperage,
If the moving lights are bulbed or LED
How big is the PA system?
And all of the auxiliary power needed, sound desks, lighting desk, laptops etc.
Add up all the PEAK wattage then divide that by 3800 that will give you how many 16amp at 240 circuits you will need.
A calculator for amount of power needed for things!
Solar batterys are great but for PA and Lighting they will need a capacitor buffer if you don’t and you play something loud and move the lights all of a sudden you will blow fuses! If you go this route make sure your peak spike loads are really kept to minimum, and use LED lighting and low powered subs.
Bio gas is another eco friendly generator type. Expensive though compared to diesel.
Hitachi are very good for small quiet ones