How are you running Powersoft on Genrators?

Hi! We aquired a Powersoft T604 for our new tops. The subs and kicks are powered by XA-1400s. Alltogether roughly 7kW sustained power. We are having issues when we are using a petrol generator on an outdoor rave. The powersoft shits down occasionally and displays „protection mode“. I guess the generator couldnt handle powerspikes properly. Now i am looking for a suitable generator but its its hard to find information regarding usage with the sensible powersoft. Questions that arise are: Inverter? Diesel? Petrol with 10kW? What brand?

Anyone here has experience with a simelar setup who can help us out?