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Car battery and electric fence

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  • 26-01-2015 8:27pm
    #1
    eorna
    Registered Users Posts: 408 ✭✭


    Would a car battery work for an electric battery fencer??


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    #2
    Mad4simmental
    Closed Accounts Posts: 1,580 ✭✭✭Mad4simmental


    Use one all the time here. Just make sure to put the battery on a dry piece of timber to stop the ground drawing power out of the battery and throw an old meal bag over it.


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    #3
    Genghis Cant
    Moderators, Society & Culture Moderators Posts: 4,980 Mod ✭✭✭✭Genghis Cant


    eorna wrote: »
    Would a car battery work for an electric battery fencer??

    On a 12v wet battery fencer it'll work away the finest.


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    #4
    Ladeeen
    Registered Users Posts: 57 ✭✭Ladeeen


    We use an old plastic toolbox when using a car battery for fencer, keeps it dry and stops it losing power, as well as keeping nosy

    beasts away from it!


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    #5
    Mad4simmental
    Closed Accounts Posts: 1,580 ✭✭✭Mad4simmental


    Anyone have a link to the security box that sumeone made up here?

    I think it was blue5000 can't remember?


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    #6
    Zimmerframe
    Registered Users Posts: 1,661 ✭✭✭Zimmerframe


    The answer is depending on the battery voltage your fencer takes, obviously if it's 12V then its perfectly fine.

    A lot of battery fencers take rectangular batteries like this type

    electric-fence-battery-55-300.jpg

    These are 9v, so to use with a "car battery" get an inline converter like so:

    ViewImage.aspx?GlobalID=1004&MerchantID=11144&ImageID=3729&DisplaySize=-1&ListingID=90285

    They are only a couple of quid on Ebay or where ever.

    http://www.ebay.ie/itm/Pow er-Supply-12V-To-9V-3A-27W-Car-Volt-DC-DC-Converters-Module-Regulator-/151301791100?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item233a4a1d7c


    You simply snip the two wires from the old 9V battery, solder it to the 9v output on the convertor, that's your fencer side sorted.

    For the car battery side, extend the two remaining wires add an inline fuse to the (+) wire and use two crocodile clips for conveniently connecting to the car battery and you ready to go.
    Your 12V battery will now supply 9V to the fence like the original battery.
    Mad4simmental wrote: »
    Just make sure to put the battery on a dry piece of timber to stop the ground drawing power out of the battery

    That's an old wives tale, as the ground can't draw power.
    It is however a good idea to put the battery in a plastic box to keep the terminals / crocidile clips from shorting / corrosion.

    The best advice with a "car battery" is charge it as often as you you can and never leave it for a long period in a deeply discharged state. You could also buy a little 12v solar panel to replenish the car battery, when it's sunny.


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    #7
    onyerbikepat
    Closed Accounts Posts: 1,921 ✭✭✭onyerbikepat


    I have been running our Gallagher B45 fencer for the last 5 years or so, on old tractor batteries. If you buy their small battery it is rated 9V, but can also use ordinary 12V batteries (Tractor, car etc) no problem too. What make / model do you have? You will probably find users manuals on the internet to check this. Here's what the literature says.

    - Also keep the battery well charged up, especially when you are not using it, say over the winter. The tractor battery I am using now, I took from our tractor, as it got weak about 3 years ago.


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    #8
    lakill Farm
    Registered Users Posts: 4,735 ✭✭✭lakill Farm


    great thread


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    #9
    9935452
    Registered Users Posts: 2,750 ✭✭✭9935452


    lakill Farm wrote: »
    great thread

    The father has been using old car batterys for years. last year he started using solar panels to keep the batterys topped up. Never has to change batterys now


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    #10
    kingstown
    Registered Users Posts: 208 ✭✭kingstown


    Also have a Gallaher fencer its yellow in colour and i suppose must be a B45 and I do the exact same as you Onyourbikepat, we have a couple of old tractor batteries that i keep charged up and swap around as i strip graze when grass get strong.
    I never buy the 9volt anymore - just use the old 12v batteries

    Thing is to keep a good check with a 'fence tester' to make sure you have a good shock


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    #11
    MfMan
    Registered Users Posts: 3,380 ✭✭✭MfMan


    Zimmerframe wrote: »
    The answer is depending on the battery voltage your fencer takes, obviously if it's 12V then its perfectly fine.


    These are 9v, so to use with a "car battery" get an inline converter like so:

    ViewImage.aspx?GlobalID=1004&MerchantID=11144&ImageID=3729&DisplaySize=-1&ListingID=90285

    They are only a couple of quid on Ebay or where ever.

    http://www.ebay.ie/itm/Pow er-Supply-12V-To-9V-3A-27W-Car-Volt-DC-DC-Converters-Module-Regulator-/151301791100?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item233a4a1d7c


    You simply snip the two wires from the old 9V battery, solder it to the 9v output on the convertor, that's your fencer side sorted.

    For the car battery side, extend the two remaining wires add an inline fuse to the (+) wire and use two crocodile clips for conveniently connecting to the car battery and you ready to go.
    Your 12V battery will now supply 9V to the fence like the original battery.

    Bump.

    Rather than solder to the fencer side, will joining the Converter via an ordinary electrical connector suffice? In case you want to use the fencer with it's proper battery again...

    How easy is it to fit a fuse and crocodile clips? have little experience of this, not being electronic minded.


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