Inverter Question (HAB AC)

Discussion in 'Motorhome Chat' started by RS_rob, Aug 5, 2014.

  1. RS_rob

    RS_rob Funster

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    So what power Inverter would I need to power up my Roof Top AC on the move ?

    2000/3000
    1000/2000

    I do not have any specs as I do not have a manual & I have tried to input the serial number in the Coleman website & it comes up with nowt.

    Thanks in Advance (y)
     
  2. haganap

    haganap Funster Life Member

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    Ok, here's my experience.

    I had a air con unit fitted on my last van with its own dedicated Waeco 3000w inverter.

    I had a battery bank of 4 batteries.

    It doesn't work.

    The reason is that the draw in Ahmps is more than what can be replaced by the on board charger. Hence after 30 mins or so the inverter will start screaming as it's battery source is drained.

    Using it via a A2B charger bypassing the onboard charger may work but I could not come up with any other solutions. My answer was to sell it in the end as the only sure way of it working was on EHU which basically as we rarely use the hook up and even more rarely go to hot countries we rendered it useless.
     
  3. RS_rob

    RS_rob Funster

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    :(
     
  4. olley

    olley Funster

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    They need a hefty start up feed so I guess the 3000 watt inverter would be the best, once running the power comes right down to maybe 1000 watts or less, that's around 100amps at 12v so it needs a direct feed from your alternator, and a relay to cut it off when you switch the engine off. Most alternators I think on motorhomes would be around 120amp so you would be running nearly flat out most of the time, not good for it.

    They can work, but I think are not really practical. You need an RV with a built in 5kva genny like mine. (y)

    Ian
     
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  5. RS_rob

    RS_rob Funster

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    Thanks olley mounting a generator is not feasable unless I upgrade the max vehicle weight as its taken up by having kayaks on the roof.

    (y)
     
  6. Snowbird

    Snowbird Funster Life Member

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    Mine works fine when on the move from its own dedicated inverter. The bus does have 2 alternators though, one for the engine and one for the habitation.
     
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