Leisure Battery "Earth"

Discussion in 'Motorhome Chat' started by horshamjack, Oct 20, 2014.

  1. horshamjack

    horshamjack Funster

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    I recently installed 2 110Ah leisure batteries in place of the 85Ah that was originally installed
    The only wires that were connected to the battery were thin prob 4 gauge 2 red 2 black? Which I assume come from charger and the alternator B2B ?
    I used 25mm cable to parallel them up
    My question is do I need to fit an earth strap from neutral to chassis ?
    The original 85Ah battery did not have one fitted
    Your thoughts and answers appreciated
     
  2. scotjimland

    scotjimland Funster Life Member

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    If it is working ok without the negative strap to the chassis, adding a second battery doesn't fundamentally change anything.. the load on the cables doesn't increase, but it would do no harm to fit one.

    Personally I wouldn't bother.. others may say differently..
     
  3. eddievanbitz

    eddievanbitz Trader - Funster

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    When you say B2B do you have an aftermarket B2B? Or are you referring to the "Split charging system" fitted by the manufacturer?

    If the latter I agree with Jim, if the former, it sounds all wrong

    Eddie
     
  4. horshamjack

    horshamjack Funster

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    Yes it is the split charge fitted by the manufacture ,
     
  5. eddievanbitz

    eddievanbitz Trader - Funster

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    Jim is spot on, if it's not broke, don't fix it. You see no appreciable improvement by tinkering, you'd have to change a lot to see any real difference
     
  6. horshamjack

    horshamjack Funster

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    Thanks for your replies
    So am I right to think this is called a floating earth ?
    It just made me wonder why the engine battery is grounded and not the leisure ?
    But as Jim pointed out everything works and since the installation of the 2 new batteries and fitting of 2 x 100w solar panels my batteries are holding their own fine
     
  7. scotjimland

    scotjimland Funster Life Member

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    I wouldn't think it's 'floating' .. just not grounded at the battery.. but if you are interested to find out, easy to check with a multimeter..
     
  8. jenny and mitch

    jenny and mitch Funster

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    Yes, as said put a multimeter on it and check continuity to earth from the neg terminal..
     
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