I have 27.5 hrs. on a Yamaha 3000iSEB (500 watt additional boost when needed) which powers my 13,500 BTU DuoTherm Penguin A/C just fine. It's only drawback is it's 151 lb. heft. I have to have help lifting it into and out of the bed of my 2500hd pickup. I can load/unload it at home with the use of several long 2X8 wood ramps with aluminum ends but once at the campsite I have to have someone help me get it out. I've been looking for aluminum ramps that will fold up and fit in the 6.5 ft. pickup bed. For this reason, I recommend buying the Honda 2000 now for charging batteries and general lighting use through your converter then buying a second 2000 when the pain strikes you along with the parallel kit. That will give you 4000 watts and the running of the 2 generators is still very quiet. This seems to be the ticket now according to a number of other RV forums. If only Honda or Yamaha would make a 4000 watt unit weighing around 65-75 lbs. then that would be just right for me. Wishful thinking I guess.
'01 2500hd ext. cab, 8.1 litre gas, 5 sp. Allison auto
3.73 rear end
Mag-Hytec rear diff cover
Amsoil Dual by-pass oil filtration system
Amsoil synthetics all around
265 watt AM Solar, Inc. system