2nd Leisure Battery fuses

Discussion in 'Solar Power' started by Revolvor, Aug 22, 2015.

  1. Revolvor

    Revolvor Funster

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    I have just fitted a 2nd Leisure battery to my Autotrail MH, in preparation for fitting Solar Panels.

    The 2nd battery is in a vented plastic battery box (approved for use by the US Coastguard!), close to the original which is set into the base of one of the under-seat lockers.

    I followed best practice – ie connecting +ve feed to one battery and –ve feed to the other, and included a 40 amp fuse at both ends of the 16mm² Connecting Cables.

    https://dl.dropboxusercontent.com/u/78803718/Fuse fitted.jpg

    For fuses I used these – bolted directly to the Battery Terminal clamp and the crimped cable terminal.

    https://dl.dropboxusercontent.com/u/78803718/Fuse.jpg

    I however have a couple of concerns now. Although I have supported the fuses, are they likey to “fatigue” due to vehicle vibration and fail physically?

    Also, yesterday I read that fuses should never be inside a battery box, because of the presence of oxygen & hydrogen during charging. The standard fit on my Autotrail has four inline fuses in the battery box!

    Am I worrying unnecessarily?

    John
     
  2. Lenny HB

    Lenny HB Funster

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    If it's a fully sealed battery shouldn't be a problem, if the batteries are next to each other with short connecting leads not really necessary to fit additional fuses.
     
  3. CandC

    CandC Funster Life Member

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    To give the fuses on my leisure battery install both mechanical and electrical protection, I used these fuse holders as so....
    IMG_5185.JPG
     
  4. pappajohn

    pappajohn Funster Life Member

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    Not good practise placing fuses inside a battery box.
    A blowing fuse can arc and the batteries may be releasing gas.....but you will know soon enough if both these happen at the same time.
    A maintenance free battery may still gas but any 'vapour' will be condensed within the venting system and returned to the cell.
     
  5. Techno

    Techno Funster Life Member

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    Nil nada
    [​IMG]

    Ditto
    [​IMG]
     
  6. Revolvor

    Revolvor Funster

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    Thanks for all your advice guys.

    I have removed the redundant 40 Amp fuses in the +ve link, and also managed to relocate all of the original build in-line fuses to outside the battery boxes.
    John
     
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