Solar panel

Discussion in 'Motorhome Chat' started by Theresa100, Jun 25, 2014.

  1. Theresa100

    Theresa100 Read Only Funster

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    Please can some one advise ,if you have a solar panel and two leisure batteries which battery should you connect pannel too the one that's was already fitted with van or the one you had added many thanks theresa
     
  2. hilldweller

    hilldweller Funster Life Member

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    Both leisure batteries should be linked together so it does not matter.
     
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  3. Baycott

    Baycott Funster

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    As they are probably wired in Parallel I don't think it matters.
    Others with more knowledge will be along shortly to confirm :thumb:eek:r not:Doh:
     
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  4. Bobby22

    Bobby22 Funster

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    Useful video may help?


    [ame="http://www.youtube.com/watch?v=bfvLcTxgvzo"]Charging Two 12V Batteries in Parallel | NOCO Genius® - YouTube[/ame]
     
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  5. Theresa100

    Theresa100 Read Only Funster

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    Thanks everybody for your help :Smile:
     
  6. hilldweller

    hilldweller Funster Life Member

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    Not bad apart from the graphics with the squeakie voice person being incorrect at 1min in. In both cases the two batteries remained connected together so the batteries could not be charged separately, not that you would if using a pair.
     
  7. tonyidle

    tonyidle Funster

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    As he ^^ says :BigGrin:
     
  8. johnp10

    johnp10 Funster

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    So:
    Would a 95ah and a 110ah connected in parallel be seen by a charger / solar etc. as a single 205ah battery, or will it charge to the 95ah level?
     
  9. hilldweller

    hilldweller Funster Life Member

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    If they are the same construction, like both wet, I think so.

    If you were to make a 205Ah battery all you would do is put the same area of lead as those two in a single container.

    You won't do damage wiring them together, fused. Charge them up and see what the result it.

    So, charge up the 110Ah, load it up and see how long it runs. Charge the 110Ah and 90Ah separately, wire them together, charge again together ( obviously this will be a short burst ) then apply the same load. If you get nearly double you know it's worked.

    Charge again together ( long time now ) and repeat the load test to be sure.

    Naturally keep you eye on them while testing, just in case.
     
  10. tonyidle

    tonyidle Funster

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    The more simple answer is that they will definitely be seen as the sum of the two Ah capacities. The batteries need to of the same construction because the charger will need to be the correct type (unless it can be switched) for either lead acid or gel. A fuse in the +ve link wire between the batteries is often advised in case one battery fails catastrophically and effectively short-circuits its partner (not a common occurrence :Smile:). If fitted the fuse should be slightly higher rated than the main supply fuse to the MH electrics.
     
  11. pappajohn

    pappajohn Funster Life Member

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    in addition, if there is the slightest possibily of the link wire being damaged then fit a fuse at BOTH ends of the live/pos wire.
    If one fuse is fitted and the link wire becomes earthed the fuse will blow BUT the other battery without a fuse is still shorted to earth....result, a fire or an exploding battery.
     
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  12. ukbill

    ukbill Funster

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    i have now got 2 batteries both 110ah i have fitted the solar panel to 1 taking the live and the other taking the neutral ?
     
  13. outkast

    outkast Read Only Funster

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    you can get solar panel controllers with outputs for two batteries.
     
  14. ukbill

    ukbill Funster

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    thats ok i dont need it i have all mine fitted now and its working a treat thanks to peter (Peter and Elaine )
    for the control box and thankless to techno for the relay info and anyone else who's knowledge i used
     
  15. mitzimad

    mitzimad Funster

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    all lead acid batteries are made up of 2v cells so however many you link up the charger will see that ampage
     
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