Wind generator for 12v battery

Discussion in 'Tech/Mech General' started by motorhome42, Mar 24, 2015.

  1. motorhome42

    motorhome42 Funster

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    Hi

    I have no idea what the set up would be but what would I need to set up a wind generator in order to charge my 12v battery. I already have a solar panel to help charging.

    Many thanks for any future replies.
     
  2. John Laidler

    John Laidler Funster

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    I wouldn't bother unless you are just looking to have something to keep the batteries from going flat when the MH is parked up unused.

    It's a simple matter of cross-sectional area and how much power you can extract from the wind. Would be pretty noisy too inside the MH.

    In a Force 5 this will generate just 72W, and it will be going like the clappers while it does. OK if you only go to windy places. I'm certainly not anti-renewables, quite the opposite, but micro-turbines are really only useful in limited applications, of which yachts are one as they can travel faster through the air than the prevailing wind - and a bit of rattle and flap goes unnoticed on a yacht. http://www.force4.co.uk/rutland-rutland-913-wind-charger.html?gclid=CjwKEAjwlsSoBRDoid2ihqnjjlISJABZoG9-IkcbcCBSmpi2zxQOuUqusEkyU-_ftAdAZK8EdQt6hhoCLeDw_wcB#.VRHMAZBFBJo8

    But don't let me talk you out of experimenting, give it a go and let us know how it goes!
     
    Last edited: Mar 24, 2015
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  3. hilldweller

    hilldweller Funster Life Member

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    Just one FUNster owns one but I don't think I've ever seen him use it.
     
  4. Tootles

    Tootles Funster

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    Tried one on our narrowboat. Jeez, it was like a Hercules going over.........Sold it to a deaf couple, and bought solar panels. (y)
     
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  5. Jim

    Jim Ringleader

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    Dingray uses one. Most showgrounds are windy old airfields and I've seen it spinning away merrily all weekend, how much it generates though, I've no idea
     
  6. GJH

    GJH Funster Life Member

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    Dingray praises his (Forgen 500). We've been camped next to him and suffered no noise problems. I would have one myself if they weren't so expensive.
     
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  7. Snowbird

    Snowbird Funster Life Member

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    I have a vertical axis wind generator and when in use find it a sterling bit of kit. It will not keep on top of battery charging on its own, but coupled with a solar array it works fine. It trickle charges when dark or if no sun 24/7. What I do find is during inclement weather when there is no sun there is often wind.
     
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  8. John Laidler

    John Laidler Funster

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    The Forgen 500 is 12W in a bit more than a Force 4, and the design is such it should be fairly quiet, compared to a fast spinning horizontal axis turbine. But even the manufacturer states they are only a trickle charger. Every watt helps of course but don't expect it to recharge flat batteries.
     
  9. Yorick

    Yorick Funster

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    It'll charge well while you are driving along :)
     
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  10. Lenny HB

    Lenny HB Funster

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    I looked at them a few years ago and decided Solar was the way to go. Unless you have a force 8 gale blowing you will get very little output. OK in theory, you will get output in the dark which solar can't do but in reality apart from extreme weather condition the wind normally drops at night. Very expensive for the obtainable output compared to solar.
     
  11. GJH

    GJH Funster Life Member

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    No, it won't recharge flat batteries but neither will a solar panel. Ray's description of his experience is very similar to Dave's:
    It's interesting to read Dave's description because the early reactions to that model (which used to be sold by Maplins at a far lower cost than the Forgen or the VAWT they sell now) were nowhere near as positive. I'm left wondering whether bad reviews were left deliberately.
     
  12. Snowbird

    Snowbird Funster Life Member

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    The problem being was that people were buying the Maplin wind generator as an alternative to solar panels as at that time solar panels were almost twice the price they are now. Since then solar has dropped dramatically in price. There is no substitute for solar when the sun is shining, BUT, as a back up the vertical axis wind generator will help on a cloudy day as long as there is some wind. It must also be remembered that not everyone has room on the roof for another solar panel. The other problem with the vertical axis charger is that it requires a good solid fixing, not just loosely thrown on the roof. You will also require some form of getting onto the roof to connect and disconnect the turbine for travel. In my opinion, if used correctly the wind charger is a good bit of kit, but that's only my opinion as it did take some time to sort out the correct fixing.
     
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  13. GJH

    GJH Funster Life Member

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    Agreed Dave. VAWT would only ever be an adjunct to solar, not a replacement.

    The roof access/fixing problem was the reason why I didn't buy one from Maplins at the time they were on sale as I would have had difficulty with the Autoquest we had at the time. Neither would be a problem with the Burstner we have now. Pity Maplins packed in selling them.
     
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  14. Yorick

    Yorick Funster

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    Don't wanna be argumentative, but my solar panels have charged my totally flat batteries many times :)
     
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  15. GJH

    GJH Funster Life Member

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    Yes, but the sun's brighter on Mars :LOL:

    I suppose it depends how much oomph the panel arrangement has :)
     
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  16. magicsurfbus

    magicsurfbus Funster

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    If it was a good option you'd see loads of them on aires - I don't recall ever seeing more than one.
     
  17. Wildman

    Wildman Read Only Funster

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    I happen to have an unused/unfitted maplin model vertical axis wind genny sitting in my workshop. Any reasonable offers considered I think they originally cost £150.
     
  18. Snowbird

    Snowbird Funster Life Member

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    May I ask why you never got round to fitting it Roger.
     
  19. Wildman

    Wildman Read Only Funster

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    I have 320W of solar, never needed it
     
  20. Abacist

    Abacist Funster

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    I thought he said not to rely on a wind turbine to charge a flat battery?
     
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