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ford_truck_guy's avatar
ford_truck_guy
Nomad
May 01, 2016

Onan install... 5.5 or 6.5

I have been quoted to have an Onan 5.5 installed in my genny compartment... What are the pro's and con's of a 6.5 - vs - 5.5 ?
Is the extra KW's and rpm worth the $800.00 up charge?

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  • eHoefler's avatar
    eHoefler
    Explorer II
    May 01, 2016
    Both will run at the same RPM, this is how you get your cycles in A/C current. You will get a more powerful engine and 1K. Generally, it takes 2 HP for every 1000 watts. Better to go bigger and not need than to be running at max all the time.

    5500 watt gives you 25 amps/220 volts
    6500 watt gives you 29.5 amps/220 volts

    on each leg

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