Tom,
Also take a look at the Yamaha Generators. We have the Yamaha EF2400is. We have two of them. We use one when we don't need the A/C and use two (with a parallel plug) in the summer. We chose the Yamaha over the Honda becuse we can power more with one unit, it has a longer run time, and has a fuel guage.
I've constructed the parallel kit myself. You can see phots on my website or directly via the Yahoo link -
http://new.photos.yahoo.com/cptxguys...60762310621090
In addition, I constructed an extended run fuel tank. I can run approximately 30 hours (under load) without refueling.
http://new.photos.yahoo.com/cptxguys...60762310621090
My first attempt with only one fuel barb in the cap was not successful, I needed a method for the tank to vent so the air would escape and the fuel would siphon into the tank.
Last I checked, Duration Power offers tanks for Honda, and was working on tanks for Yamaha generators.
http://durationpower.com/store//index.html
FWIW, I purchased both units from wise sales. They are also great for parts and accessories. -
www.wisesales.com We also purchased hour meters, generator covers, and the additional fuel caps for the extended run tanks.
Info on the EF2044is -
http://www.wisesales.com/YamahaEF2400iS.html
Both units fit easily in the bed of the truck. I have a roll top cover to protect them from rain during transport.
I have 'field tested' a single unit. It was capable of running the 15K BTU A/C (or heat pump), along with the refrigerator, power converter (I don't know what 'stage', and TV. However, If I'm going to be using a power 'hog' like the A/C, I prefer to use both generators in parallel.
I hope this helps. Let me know if you have any questions.