What cable?

Discussion in 'Solar Power' started by Patcherelli, Jan 24, 2015.

  1. Patcherelli

    Patcherelli Funster

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    Planning my installation and I know the cable from panel to controller has to be the UV stuff but what cable should I use from controller to batteries?
    Is it the same?

    Thanks in advance
     
  2. Wildman

    Wildman Read Only Funster

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    as large as will fit your regulator 4sqmm preferably
     
  3. simbadog

    simbadog Funster

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    4mm Tri rated is what I use (y)
     
  4. scotjimland

    scotjimland Funster Life Member

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    that depends on the cable length, voltage and max. current .. and also what % losses you are prepared to accept..

    for example..

    a 2mt run @ 14volts with a max load of 20amps with 3% loss would require .. 4mm2 ..

    increase the cable run to 4mt and you need 10mm2 cable

    use this calculator to size for yourself..
    http://www.solar-wind.co.uk/cable-sizing-DC-cables.html
     
  5. Patcherelli

    Patcherelli Funster

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    Thanks thats great.
     
  6. Gizmouk

    Gizmouk Funster

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    What size panel(s)?
    What's the approx distance from the controller to the batteries ?
     
  7. Patcherelli

    Patcherelli Funster

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    I'm planning to add a second 110ah leisure battery and fitting a 100w panel. Distance from panel to controller around 3m controller to batteries 1.5m

    Still very much at planning stage so all advice welcome.
     
  8. Peter A Forbes

    Peter A Forbes Funster

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    We used 6mm Tri-rated on all of our solar panel runs.

    Peter
     
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  9. AT Fun

    AT Fun Funster

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    The cable from the panel to the regulator is cheaper if you get a long MC4 and cut it in half then the cut ends pass through the roof gland and the other ends give you a male and female to plug into the panel. Its cheaper than buying two cables and cutting the ends off.
     
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