Inverter Size

Discussion in 'Tech/Mech General' started by kelv, May 5, 2015.

  1. kelv

    kelv Funster Life Member

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    Hi
    A question for the technical minded funsters
    Her who must be obeyed will not go away without the home comforts of her Ghd hair straighteners taking a genny is ok but not always practical ie noise etc.
    So my question is what size inverter will it take to operate the straighteners
    110-220v ac.60hz/50hz,150w this is on the plate.
    Thanks for any help.
     
  2. funflair

    funflair Funster Life Member

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    Hi kelv

    Based on your figures 300 watt should be fine, not sure if straighteners will run from modified sine wave inverter, somebody else will know for sure.
     
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  3. kelv

    kelv Funster Life Member

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    Thanks I think they have to be pure sin wave not sure but thanks for the help
     
  4. pappajohn

    pappajohn Funster Life Member

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    Straighteners are a simple resistive load....hot wire element....so will work fine on a mod wave invertor.

    As said above, a 300 watt is more than adequate but it depends how long she needs power for.

    150watt through an inverter is around 15amps/hour from your battery....and that 15amps/hour has to be replaced.
     
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  5. kelv

    kelv Funster Life Member

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    5 mins per day no more than 2/3 days of grid
    Thanks
     
  6. Reallyretired

    Reallyretired Funster

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    You can get a small inverter that will do the trick for around £20. Even though its a pretty small one you still need to keep the leads to the battery as short as possible. The mains wires can be as long as you like.

    You don't need a pure sine wave for most things, but as they are getting cheaper you might find it worthwhile for other things. 300w about £35.
     
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  7. JeanLuc

    JeanLuc Funster

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    I have no direct experience you understand, but have read reports of GHD straighteners being 'fried' by inverters. I would have thought a PSW model would
     
  8. Lenny HB

    Lenny HB Funster

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    Straighteners & electric tooth brush chargers are well known for frying on modified sine inverters, if you buy a pure sine wave inverter you can run anything without worrying about blowing it up.
    If it is just for straighteners why not get a Bablyiss gas hair styler.
     
  9. kelv

    kelv Funster Life Member

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    Do not be so silly that would be to easy the wife will not swap to a gas straightener she says they are not as good maybe I should swop her for an air operated doll
     
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  10. iceni

    iceni Read Only Funster

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    I had one of those but it went down on me
     
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  11. jdk62

    jdk62 Funster

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    and is that a problem.......? :rolleyes:
     
  12. friar tuck

    friar tuck Funster

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    isnt that the deluxe model?
     
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  13. tonka

    tonka Funster Life Member

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    Deleted... Was going to mention Gas straightners but see they have been done..
     
  14. stevec

    stevec Funster

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    You don't need a pure sine wave for most things, but as they are getting cheaper you might find it worthwhile for other things. 300w about £35.[/QUOTE]

    That sounds cheap. Where do you get those from?
     
  15. SteveandDenise

    SteveandDenise Funster

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    My wife uses GHD on a modified sine wave Stirling no problem for the last 2 years.
     
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  16. dabhand

    dabhand Funster Life Member

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    Did they charge you extra for that?
     
  17. scotjimland

    scotjimland Funster Life Member

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    As said... go for a PSW .. a 200 watt is adequate.. but not a lot more for the 300watt ..

    Just bought a 200watt Sterling PSW to charge Mac Books, Camera batteries, tooth brush etc

    .. good prices here http://www.sp-shop.co.uk/Power-Inverters/

    200watt PSW part number SIB12200

    300 watt PSW part number SIB12300

    if you order, made sure you don't order a 24v model..

    The Benefit of the 200watt it comes pre-wired with a ciggy plug, so no extra installation needed ..
     
    Last edited: May 7, 2015
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  18. JeanLuc

    JeanLuc Funster

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    I know they are convenient, but personally, I would not go for the cig lighter connection option. The cables from the cig plug to the inverter are fine, but the cabling from battery to cig lighter socket may not be up to the job of supplying the inverter without voltage-drop that will cause an alert condition on the inverter. This will be particularly true if trying to run the inverter from a 'habitation' socket rather than a dashboard base vehicle socket. Also, at 'full tilt' a 200W inverter will be pulling 17 amps and many motorhome sockets are not cabled to cope with that.
    I speak from personal experience having had the problem with a 150W Sterling PSW inverter which I subsequently wired directly to the leisure batteries. (I spoke to Sterling before cutting off the cig lighter plug to check it would not invalidate the warranty.)
     
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  19. scotjimland

    scotjimland Funster Life Member

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    @JeanLuc

    no argument with your logic Phillip .. I also prefer direct hard wiring..

    however, the dashboard ciggy sockets are usually rated at 15Amps.. and while at full tilt, a 200watt will pull just under 17Amps.. personally I wouldn't load any inverter to 100% .. I doubt mine will ever even reach 50% charging a Mac or Camera battery.. the Sterling has a power meter so you can monitor it ..

    The Hab sockets in the Hymer are rated at 10amps..

    It's a judgement call.. if you plan to use the inverter at near max then probably better 'hard wired'
     
  20. scotjimland

    scotjimland Funster Life Member

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    yes , but there are modified sine wave inverters, and modified sine wave inverters.. not all are the same quality of wave.. generally speaking, the more extensive are a higher quality .. ie . smoother wave forms. .. but unless you stick it onto a scope you don't know.

    Sterling are a good brand.. but there are some real cheap Quasi inverters that are not.

    Buy a pure sine wave and you can use it for anything (within the power rating) without fear of frying .. nowadays nearly every appliance and gadget has an electronic circuit .. yes, even hair straighteners.. why take a chance..
     
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