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  1. #1
    Join Date
    Apr 2005
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    Looking out of the window
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    13,932

    Default Battery box for more than one battery

    Iíve obviously seen the boxes for single batteries, but what if like me you have 6 in a row?
    Do you put each in its own box? If so how do you connect them up without breaking the seal and defeating the point?

  2. #2
    Join Date
    Jan 2012
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    Reading
    Posts
    560

    Default Re: Battery box for more than one battery


  3. #3
    Join Date
    Apr 2005
    Location
    Looking out of the window
    Posts
    13,932

    Default Re: Battery box for more than one battery

    J
    Quote Originally Posted by Ian h View Post
    Perfect.

    I shall give them a call

    Lovely idea but £744+vat each. Might need a rethink
    Last edited by Whitelighter; 13-08-19 at 08:28.

  4. #4
    Join Date
    Apr 2013
    Location
    Guernsey
    Posts
    451

    Default Re: Battery box for more than one battery

    Battery Boxes are really easy to knock up using offcuts of ply 12 mm ply
    Make them bigger than the batteries by about 25 mm to allow you to wedge them tight in..
    It also allows for the contents of a battery should one split.
    Nail them together and then rough them up inside and out.
    Give the box a coat of resin then fiberglass inside and out.
    Paint the outside with Grey Damboline bilge paint or similar.
    If you want you could paint the inside with epoxy resin, but I probably wouldn’t bother.
    Just an extra coat of resin would do as...
    If you do split a battery you tend to notice and the acid... if indeed it is would take time to eat its way through GRP.

    If you make the box higher than the batteries by 50 mm I probably wouldn’t bother with a lid.
    But a lid can be made up in the same way, but remember to allow for cables to exit the box.

    Also take into account the position of the box... You need clearance to lift the batteries out.
    Also fixings need to be sealed , and secure... Batteries are really heavy... And boats move about quite a bit.
    ,

  5. #5
    Join Date
    Jan 2009
    Location
    Stratford on Avon
    Posts
    11,180

    Default Re: Battery box for more than one battery

    Jez, my Azi has 2 batt boxes, port side for domestic, stbd for engines and bowthruster. Both vented through hull glands.

  6. #6
    Join Date
    Jan 2012
    Location
    Reading
    Posts
    560

    Default Re: Battery box for more than one battery

    Quote Originally Posted by Whitelighter View Post
    J

    Perfect.

    I shall give them a call

    Lovely idea but £744+vat each. Might need a rethink
    Ouch I only came across them via google . know they have a good reputation for tanks but we all have limits to how much we prepared to pay

  7. #7
    Join Date
    Feb 2008
    Location
    Farndon
    Posts
    3,011

    Default Re: Battery box for more than one battery

    how do you connect them up without breaking the seal and defeating the point?[/QUOTE]
    Battery boxes aren't usually sealed... are they?

  8. #8
    Join Date
    Jan 2009
    Location
    Stratford on Avon
    Posts
    11,180

    Default Re: Battery box for more than one battery

    Quote Originally Posted by MartynG View Post
    how do you connect them up without breaking the seal and defeating the point?
    Battery boxes aren't usually sealed... are they?[/QUOTE]
    Mine are and vent out through a hull gland.

  9. #9
    Join Date
    Feb 2008
    Location
    Farndon
    Posts
    3,011

    Default Re: Battery box for more than one battery

    Quote Originally Posted by rafiki_ View Post
    Battery boxes aren't usually sealed... are they?
    Mine are and vent out through a hull gland.[/QUOTE]
    Useful learning experience this forum.

  10. #10
    Join Date
    Jun 2010
    Posts
    960

    Default Re: Battery box for more than one battery

    Quote Originally Posted by MartynG View Post
    how do you connect them up without breaking the seal and defeating the point?
    Battery boxes aren't usually sealed... are they?[/QUOTE]

    No, they aren't because of the gases they emit during charging and discharging, but while they can be sealed to prevent the ingress of water they also need to be vented to atmosphere as the gases are explosive, usually it would be a 2 way valved system with very low pressure and as this pressure is reached they open to expel gasses and prevent the ingress of water through the vent pipe.
    I am old and wise because i was young and stupid.

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