I bought the 5000 watt inverter so it is about double the capacity of what I would ever load it. (I use it on a 20 amp breaker on the output = 2,400 watts).
When I built my trailer I had a lot of ideas in my head among these was the near total elimination of the redundant 12 volt
system. All lights etc in my trailer are 120 volt with the exception of a few auxiliary LEDs, the water pump, and the outdoor porch lights.
I run two 100 amp hour batteries, and I have installed a home built 4,500 watt propane fired DC generator to power/charge the batteries.
Will it work?
Well the inverter has worked well on two trips, working for hours when parked supplying my lights, TV and refrigerator.
In this configuration the tow vehicle will charge the batteries while I tow, and I can charge the batteries when plugged into shore power.
I just added the generator to be able to run the air conditioner whenever I want. It works in my trials in the shop, it is yet to be tried on a practical manner.
The DC generator used in conjunction with the inverter is I think very much like an inverter generator with battery backup.
Once it has been proven, I intend on doing a write up on my new approach, or if it is proven a failure I will chalk the waste of time to experience....