Picking the right generator comes down to matching the output to your gear....

https://oliviamaids.com/how-do-i-estimate-total-wattage-for-lights-fridge-and-tools-together/

Picking the right generator comes down to matching the output to your gear. Total the wattage of your tools and add a buffer for startup spikes. Diesel is best for long days, but petrol works for light weekend jobs