Heated Rollers on 12 volt supply

Discussion in 'Motorhome Chat' started by bernardfeay, Sep 19, 2015.

  1. bernardfeay

    bernardfeay Read Only Funster

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    Is it possible to buy 12 volt heated rollers for use in the campervan?
     
  2. Don Quixote

    Don Quixote Funster

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    I stand to be correct, but I doubt it as the amps drawn would drain your batteries in no time.
     
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  3. Ralph-n-Bev

    Ralph-n-Bev Funster

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    I know we have an inverter , good battery , solar, etc so I don't know if that makes a difference and Ralph isn't here to ask. But I use my regular Heated rollers , hairdryer and ghd's from home. The last time I used the rollers, Ralph looked at his battery monitor to see what they were pulling off it. And said they weren't that bad ?
    That's without hook up.
     
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  4. Jaws

    Jaws Funster Life Member

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    Actually......
    Heated grips on bikes usually draw about 1 to 1.5 amps.. Now the old ones get red hot ( new legislation demands a much lower cut off temperature and actually draw eve less current )

    Now.... A few 10 ohm 50 watt ceramic type wire wound resistors mounted in ally tubes could be used to slip inside rollers..
    Each heater would draw a little over an amp.
    Lets say you make up ten of them.. they would take maybe 10 minutes tops to heat up
    Yesssssss.. they would take their toll on battery longevity to some extent but only to the tune of just a few amps.

    Some math for you.

    12 v / 10 ohm = 1.2 amps
    times 10 for ten rollers = 12 amps.

    12 amps used for 10 minutes = 1.2 amp hours.. Surprisingly little in fact

    Even halving the the resistance ( and doubling the current and the heat available ) would not impinge too badly on battery reserves

    I should say I know sod all about how they are used but am guessing they should stay in place for 10 minutes or so ?
    That would give a total power expenditure of less than 5 amps !
     
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