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105Ah Custom Dual Battery -With Pics..

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  • 105Ah Custom Dual Battery -With Pics..

    Hi Everyone,

    As you all know, this forum is awesome and is full of fantastic idea's. In the interest of keeping the idea's rolling, here is my recent Dual Battery installation.
    My basic reason's for doing it this way was because I wanted a 100Ah + battery (Heavy beasts) and because I still worry about the weight of a 2nd battery on the Prado's Guard. I know that this issue has been pretty much resolved these days, which brings me to my last reason... I probably just like making life difficult :roll:

    Battery Specs:
    Remco RM12-105FT AGM battery

    Isolator: Sidewinder

    Here's the Isolator - Mounted on a custom Alloy bracket (Made it myself :lol: ). Bracket utilizes existing bolts in this location and has a Full sized rubber pad between firewall and bracket - don't want it vibrating on the corrugates and eating my firewall. Isolator is bolted to bracket with 2 small bolts and was also glued on with Sikoflex. (Hope I never have to open it up :lol: )


    Battery location:
    I chose to modify my rear draws. Due to luck, the battery - see model above - fits just nice across the width of my draws. So this being the case I shortened one of my draws by about 110mm so that the battery could be located hard up against the end of my draws. The pic below shows the battery installed with the draw out. Anything the battery touches is carpeted and there is a metal "L" piece across the floor section which holds and positions the battery very nicely. The screwed and glued roof block ensures that the battery has no way of moving up. Overall, the battery did not move in the slightest, even after rigorous testing.


    Battery Maintenance:
    As you need to always be able to get to / get out the battery, I modified the side of my draw system and created "the battery slot" :wink:
    I also made up a handle which you can see covering the terminals. The battery sits in there quite firmly so in order to slide it out - the handle is a must. No handle = Stuck Battery!


    Connections:
    The main cable (Both Active and Negative) was run from the engine bay in conduit through into the back cargo area - exiting into the interior from under the plastics near the wheel arch. The cables are run through the cabling hole in the draw unit and connect to the rear connections as shown below. The big Anderson's plug is a 120Amp rated unit and connects the main battery to Aux Batt. The Smaller 60Amp Anderson connects a 600watt inverter. The visible 60Amp circuit breaker acts both as a safety device as well as turning on the inverter when needed. Fridge cable is fused with 7.5Amp inline fuse. Battery tester is just for Geek Factor.. :lol: The red tape covering all the terminal points is that rubberized self amalgamating Tommy Tape. I found it excellent for the job of insulation as it melts and molds into itself, yet is not sticky !.



    Completed unit ready for installation.


    Finally, The main cable was fused with 100Amp fuses. One between main battery and isolator and one just before the connection plug to the Aux Battery. The Fridge / Inverter have a separate earth wire run directly back to the Aux Battery.

    Anyway this setup works well for my needs and still allows the draw system to be easily and quickly removed when needed. Granted I won't have a 2nd battery if I take the draws out - but for me, the draws pretty much never need come out. Additionally I can aways leave just 1 draw in if needed as they are separate units.

    Comments / new or better idea's are welcome.... Just don't ask how long it all took.. :roll:

    Thanks for looking.

  • #2
    Re: 105Ah Custom Dual Battery -With Pics..

    Nice job, fits together well.

    I am about a third of the way through building my set of drawers and have built a removable 100Ah aux battery box behind the drawer too. Battery box has all the sockets, fuses, voltage meter and charger connections built into it, and there will be a RanOx charger that it will connect to when in the car.
    From past experience I found I was leaving the battery and fridge, lights, etc at camp most of the time, so portable power was the way to go.
    [size=0][i][b]2009 Charcoal V6 GXL Prado:[/b] [/size][size=0]OEM Tow bar + rear recovery point - PP Front recovery points - Just Straps Recovery Gear - 40L Engel on Waeco slide - RanOx 100Ah AGM portable dual battery system - Rhino 1512 Roof Rack on factory rails - PP spare tyre spacer - DIY Rear drawers - Staun tyre deflators - Hilux washer jets[/i][/size]

    Comment


    • #3
      Re: 105Ah Custom Dual Battery -With Pics..

      That looks like a neat instal and puts the weight just where you want it.

      However, you run the risk of a defect notice under current regs, even here in westoz. The battery must be in a sealed compartment and vented to the outside atmosphere. You cannot even mount a totally sealed battery inside the cabin. Just been all though this with our DPI (Licensing) with a boot-mounted battery in a 460BB 75 XB Coupe.
      Dave
      Views expressed are mine alone and are not intended to compromise the integrity of my employer nor offend those who may read such views.
      Bugger Bali, get out and see Australia before we sell it all to China.

      Comment


      • #4
        I wonder how this works out with a BMW M5 who has it battery mounted in the boot as stock standard.I don't see any vents.



        Cheers Russ
        2003 GXL Turbo Diesel,

        Comment


        • #5
          Probably a non venting type of battery such as AGM. But IMO I would never use an AGM as a starter battery, although they are capable.
          SSSHHHH be very very quiet were huntin wabbits.

          Comment


          • #6
            nice install, out of interest how thick are the cables that run all the way to the back (voltage drop on distances)? Must have cost an absolute fortune

            Comment

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