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

https://www.alphabookmarks.win/picking-the-right-generator-is-all-about-the-job-at-hand-first-calculate-your

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