I only use a genny for battery charging in the boonies. Don't have, or need, a microwave, TV, or coffee maker in either the camper van or the RV.
I had a 1200w/1500w Champion till I wore it out at 1200 hours. $200 and bigger than needed. Went through two of the 800w/900w Harbor Freight two-strokes. $100 and still bigger than needed. This year got a 1500w/1800w Champion. According to Champion, same engine as the 1200w/1500w I had before, but with a beefier alternator. $200, but only sold at Tractor Supply.
Though they were all bigger than needed, more than 12-14 hours run-time while battery charging would have been nice, but never needed for the 100ah aux battery in the camper.
The difference these days is that the camper now has a 300w solar panel and 400ah battery bank, which will eventually get swapped over to the RV.
So I don't really need a genny at all anymore, except that I like shade in summer - in the mountains...at the beach or in the desert, not an option unless I deploy the parachute to have an awning that covers the entire vehicle and provides shade on all four sides.
Which I haven't done since I got the solar, but I might. In which case the solar would be covered and I'd need a gen for battery charging. The camper has a 5g horizontal propane tank, the RV 15g. I swapped out the 3-way propane fridge in the camper for a 12v compressor fridge and will probably do the same in the RV eventually.
So having a 900w gen that could run from propane, that would be big enough for battery charging and also have a longer run-time for the bigger battery bank - AND throttle down over time as the batteries absorb - would be perfect...for the rare occasions when it would actually be needed. And no worries about gummy carbs, carbon build-up, or altitude compensation.
Like I said...I want that. Wanted it for years.
Of course the published run-time numbers are a bit misleading as they are at 25% load. No worries though...Honda does the same thing with their run-time numbers.