A factory installed 2000W inverter like what Pleasure-Way has would be a nice addition.
400 AH of AGM batteries also much better with the compressor fridge as noted especially for those that will camp in the shade.
I'm sure there are potential customers (like me) who don't want or see much need for a separate underhood generator/aux alternator or an Onan. I do like to run the microwave oven, toaster or a coffee maker etc. without needing to start any type of engine for power. I first had the ability to do that more than a decade ago now so it is surprising to me that it isn't a standard feature yet.
It's very unlikely I'd ever idle an engine for hours to cool an RV. My rig has had the capability to do that for the last 4 years but I have never done that on a trip. My preference is to find a campground and plug in if A/C cooling is a must. I did run an Onan for air conditioning once but that was because mosquitoes upon return to the no hookup campground near Crater Lake forced us inside the hot coach after being out all day.
I like to keep the AGM's in the RV fully charged so I have run the van engine to power the microwave oven if around lunch or dinner time. In the morning I don't bother starting the engine and instead just draw power from the batteries.
Other brands with inverters:
Hymer/Roadtrek and Advanced RV offer higher power inverters.
Pleasure-way offers a 2,000 watt PSW inverter.
Safari Condo lists a 1,500 watt PSW inverter.
New West offers a 1,500 watt inverter on their Ford Transit and a 2,000 watt inverter on their Sprinter model -
https://www.new-west.com/eng/
5-Mars lists a 2,000 watt inverter on their Promaster based Ispiration model -
INSPIRATION.
Gala RV Montecarlo listed a 2,000 watt PSW inverter on their Promaster model.
Avion Azur lists a 2,000 watt inverter.
Looks like Chinook lists a 3,000 watt inverter.