Not trying to be critical I'd just never heard of a generator being put as making more output than you could from shore power.
Since I was a generator mechanic in the Army I used to compute the load that would be placed on each generator and how to properly distribute the load.
I really wish my generator was a diesel unit instead of propane. Good luck with it all.
No worries, I don't know enough about generators to say how it makes that much power aside from bigger = more, I only know what the spec sheet and instructions say — which are clear that it's not a peak rating.
I was deliberate in my gen choice because we don't plan on being at campgrounds much so we need to rely on our gen to power everything. I think the main benefit isn't necessarily powering
everything at once, but rather at elevation or higher temps that the generator won't be working beyond its limits or ever be overloaded. My hope is that this means it'll last a long time without wearing parts out. The maintenance schedule on these diesel generators are also very minimal, next major service is at 1,000 hours but the tech at Cummins told me that if I hit that before 5 years to just keep going.
It's certainly a big boy and weighs a lot. Smaller normal RV size units don't put out that much power.
It also sips fuel at 0.1 gal per hour at idle. Or 1 gal per hour fully loaded. The fuel tank is 40 gallons iirc so that should last us a long time before refueling.
The down side to diesel is that I can't share the fuel with the Jeeps.
You mentioned wishing yours was diesel powered. I don't have any experience with RVing to know if it's good, but they do make a smaller 3000 size diesel generator that they can stand pipe from a RV main fuel tank that could be an option for you.