Connecting 2 leisure batteries......

Discussion in 'Tech/Mech General' started by camcondor, Sep 24, 2013.

  1. camcondor

    camcondor Read Only Funster

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    Quick question to those in the know......I have space in battery locker to fit two leisure batteries alongside one another, so want to put two 110aH batteries next to each other, connected in parallel, neg to neg and plus to plus, but my question is how on earth do I make the connections as the battery poles are not that long and will definitely not easily accommodate two sets of battery clamps........?

    What is recommended and what diameter cable should be used? Also should I put an inline fuse between the pos terminals of the two batteries ? It is such a short run as they are next to each other.

    Assuming best practice is to use the double battery supply by using the pos pole of the one and the neg pole of the other.

    Assuming that one of the neg poles is earthed with a strap to chassis, yet another thing to fit on the battery pole!! :Eeek::Eeek::Eeek:
     
    Last edited: Sep 24, 2013
  2. knokinonabit

    knokinonabit Funster

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  3. camcondor

    camcondor Read Only Funster

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    Thanks, I have Clive Mott's link, it does set it all out quite clearly, but what nobody seems to do is give practical advice on what connectors would be best, etc - all the practicalities of what specific connector /strap/clamp /cable is recommended. How do people get two lots of clamps onto relatively short battery posts? Or would a set of traditional clamps and a set of quick release clamps work? I guess thats probably the way forward........and clamping a neg to the body with an earth strap.
     
  4. knokinonabit

    knokinonabit Funster

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    You can buy battery terminals that allow you to connect two wires into them. Look on Halfords site and search for battery connections.
    If your batteries are next to each other you will only need the existing earth lead that is there.
    Cable, connectors and fuses can also be bought at Halfords, also at most car accessory shops.
    Looking on the Halfords site should give you some ideas, but I am sure someone will be along to give professional advice soon.
     
  5. MikeD

    MikeD Funster

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    Not sure about Adria but Autotrail.

    Have a kit of wire,fuses and connectors with the associated plugs already installed in the van.

    Don't buy the kit from makers but alas I can't tell you where I did as we are not home at the moment.

    Wiring kit was about £15 and only took about 10 minutes to fit :thumb:
     
  6. vwalan

    vwalan Funster

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  7. haganap

    haganap Funster Life Member

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    New connectors were required on mine. Similar to the one's Alan Highlights above. Allowing for the use of two round terminal connectors.
     
  8. camcondor

    camcondor Read Only Funster

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    Thanks for that, have bought a pair of those and about to order cable now - should I go for a thicker cable to connect the two batteries given they will be 2x 110aH ?
     
  9. haganap

    haganap Funster Life Member

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    Yes I would and did. The cable on mine was totally inadequate. :thumb:
     
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  10. pappajohn

    pappajohn Funster Life Member

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    as the batteries are next to each other you will only need one fuse, providing there is NO POSSIBILITY of the interlink cable being damaged.

    the fuse will protect the batteries if one develops an internal earth fault.
    if not already fitted in the vans supply wire, place another as close as possible to the battery in the positive wire

    a 30 amp fuse will be adequate.
     
    Last edited: Sep 26, 2013
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  11. camcondor

    camcondor Read Only Funster

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    Thanks for all above, will order better cable, any opinions on the best thickness to use for the 110 batteries?

    Also, should there be an inline fuse between positives of battery 1 and battery 2 as well as a fuse in the connection from the vehicle battery positive to battery - just checking pappajohn!
     
  12. Heyupluv

    Heyupluv Read Only Funster

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    try these types
    [​IMG]
    [​IMG]

    [​IMG]#
     
    Last edited: Sep 26, 2013
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