QUOTE (Weinel, Alan [at] Sep 3 2009, 11:32 AM) Lloyd - how timely... I am looking at the exact issue - Air Conditioner and CPAP.
I use a 'Respironics Remstar+' model 122335. It has two sections that are separable. The air pump runs on 12VDC, and the humidifier on 115VAC. When camping (most of which is dry) I take only the pump section, and power it with a home-made cigar lighter power cord. These are available pre-made, for about $50, but mine cost about $10. As for recharging, I have equipped our trailer with a Xantrex XDC40 40 amp 3-stage converter/charger, instead of the crappy old 5amp single stage charger it came with (www.bestconverter.com
As for powering an A/C with the Honda EU2000, or the Yamaha EF2400iSC, the biggest single factor seems to be the size of start capacitor in the A/C (if it even has one, mine didn't). Go to www.modmyrv.com
and look at mod #82. As you can see from my comments there (Lloyd BC), I had severe problems with my A/C, even using a Yamaha EF2800i, but now with a makeshift mod done, the 2400 barely hickups. Now I'm just waiting for the proper part to arrive.
BTW, the 2400 runs my neice's A/C or Micro, no problem, but we're only at 2000', and don't usually camp above 4500'.