this company has had some good reviews ( was mentioned on SUrvivalblog.com )...I never bought anything from them...they are in Maine:
Central Maine Diesel
here is link to a small tri-fuel generator there:
http://01856bc.netsolhost.com/order/03352.asp?page=3352
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As an update, for my own home preparedness, I just bought a " used for 5 hours " gasoline 5.5kw generator, via Craigs list. I bought it from a guy who lives 1 mile from me, and he's retired and buys, fixes, resells small moter equipment on Craigs list. This generator I purchased looks new, he was selling it for a friend who just updated to a whole house system. The price was right ( IMHO) at $350, and it got me a backup solution just in case the power goes out.
I do currently have a backup for the Pellet stove, consisting of a deep cycle battery and a inverter/charger unit...but in a multi-day power outage, this would not last ( I have yet to test it out to see the extended battery life run time when powering the pellet stove). The addition of this 5.5kw generator will allow me a power source to recharge that backup battery, and provide power for the refridgerator, etc. .
Now the next steps are to get a manual transfer switch ( preferably a 6 to 10 circuit) and either find a trustworthy ELectrician to wire up the transfer panel ( seeing as how the main circuit breaker box is in my gun room ) or do the transfer box wiring myself. This way I can use the generator as a 240v souce to the transfer panel, and use 2 circuit for the 240v well pump, and 4 circuits for selected rooms in the house.
Long term goal would be to get a Diesel Lister type generator setup and/or a solar panel and deep cycle battery setup.
But I feel a bit better just having the generator now sitting there in the garage, even if I would have to use extension cords into the house when it would be running outside....