onan genny 120v to 240v conversion?

Discussion in 'American RV's' started by doodle, May 4, 2010.

  1. doodle

    doodle Read Only Funster

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    Hi All,

    Anyone know how to reconfiguire the onan genny to supply 240v? My daybreak has an onan fitted. It states its 120v but runs 240v appliances.

    Not sure if there is some magic box or its been rewired internally.

    I bought a spare one to squeeze under my Mercedes. Prob is not sure how to or if its possible to get 240v from this unit. Someone suggested its just a matter of taking the tappings from the 'generator' and reconfiguring them to supply 240v (at slightly reduced KV output) instead of the original 120v as stated on the unit.

    Bit hesitant to start stripping my working one to find out so if someone knows what they're on about and can 'illuminate' or 'supply' me with any info I'd be grateful.

    I've got a pal who's a sparks but don't want to ask him first incase he demands beer tokens for info!!!

    Any ideas anyone?

    Cheers :Wink:
     
  2. dazzer

    dazzer Read Only Funster

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    Somewhere in the Rv will be a transformer that ups the 110v to 240v (a lot of the kit installed on the RV will be 110v anyway). There is also the problem of the hertz output as USA systems use 60htz while we use 50 htz. There is system out there that changes both the voltage and the htz to UK spec but its expensive.
     
  3. ginge61

    ginge61 Read Only Funster

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    ye beet me was looking into this the other day and a step up transformer norm does it but like has been said expensive id say
     
  4. johnsandywhite

    johnsandywhite Read Only Funster

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    :BigGrin: SOME Onan Gennys are set up to give 220/240 if they are fitted with equal amperage breakers. Most are fitted with a 30 amp and a 20 amp giving 50 amps. Each leg is 110/120 but across the 2 legs they can give 220/240:-

    http://www.bobhatch.com/electricStuff/genset_jbox.htm
     
  5. Snowbird

    Snowbird Funster Life Member

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    Cant realy answer your question but my Onan emerald which is now 21 years old kicks out 220-240 volts.I dont have any 110 in the RV and no step transformer.
    The RV was imported new into the UK so dont know if that makes any difference.
    Mine looks exactly the same as the 110 ones so it must be possible to convert them.
     
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