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  • Aftermarket alternator or DCDC charger?

    Hi,

    I recently purchased a 2012 Prado 150 GXL Diesel with nearly 90,000km on the clock. I'm looking at fitting a dual battery system (Kickass battery box in the rear with 120A/H AGM). As the Prado has a smart alternator I need to add a DCDC charger to the kit which adds about $400 to the cost.

    My question is, am I better off taking that $400 and fitting an aftermarket alternator so that I won't need a DCDC charger or stick with the one I have and get the DCDC charger? I've read that the alternators in the Prados tend to fail after a while so with 90k on the clock I may need to fit a new alternator soon anyway. I'm doing a central Australia trip this year so reliability is critical.

    Any advice greatly appreciated. Thanks for your time.

  • #2
    Hi Rimsy, there is a much cheaper and better alternative. Just get one of LeighW's Alternator Voltage Booster fuses.

    This will instantly raise your voltage by around 0.6v and costs about $50.

    LeighW is on this forum, contact him through a PM, and he can give you all the info you need.
    drivesafe
    Senior Member
    Last edited by drivesafe; 11-02-2018, 02:10 PM. Reason: Typo

    Comment


    • #3
      A DCDC charger won't increase the capacity of your alternator. Agree about just using a diode.
      [B]Steve[/B]

      2010 Silver GXL Prado 150, D4D Auto, with a few non standard bits

      Comment


      • #4
        Hi, I have a dual battery set up in my 2011 GX Diesel using one of these https://www.projecta.com.au/dual-battery-charger-idc25/.

        I've got a solid kit dual battery monitor installed and its showing around 12.3-12.4v for the cranking battery when it hasn't been driven for a few days to a week or so. I'm not having any problems with voltage levels in the auxiliary battery.

        As the problem is likely due to the car being driven infrequently (and on short trips), would I be better off getting one of the alternator voltage boosters (https://www.hkbelect.com/) or a small solar panel to ensure the cranking battery remains at a good charge level when the cars not being used often?

        Comment


        • #5
          Originally posted by Frazzy_goreng View Post
          Hi, I have a dual battery set up in my 2011 GX Diesel using one of these https://www.projecta.com.au/dual-battery-charger-idc25/.

          I've got a solid kit dual battery monitor installed and its showing around 12.3-12.4v for the cranking battery when it hasn't been driven for a few days to a week or so. I'm not having any problems with voltage levels in the auxiliary battery.

          As the problem is likely due to the car being driven infrequently (and on short trips), would I be better off getting one of the alternator voltage boosters (https://www.hkbelect.com/) or a small solar panel to ensure the cranking battery remains at a good charge level when the cars not being used often?
          ************************************************** ************************************************** ************************************************** ************************************************** ******

          The voltage boosting diode is such a simple, easy and effective modification I would definitely try that first...just check first your model is compatible, but I'd be almost certain that it is... I had a 2010 GXL and the voltage booster diode upped the alternator voltage to around 14.4 volts. That would be a good starting point anyway
          SE Qld: GX 150GD Auto, (Feb'16 build): TJM T15 steel b bar, 9,500lb TORQ winch, TJM s steps, Rhino Pioneer Platform (42102B 1928X1236mm), front recovery points, Wynnum towbar, P3 brake controller, TNN Underbody guards, UHF, TREKtable & LED striplight, Custom Fridge & Drawers, Waeco CFX50, 9inch illuminator 160W LED spots, 40mm lifted Dobinson Suspension (Zordo's), ScanguageII, 30 Sec Wing Awning

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          • #6
            So is a resting voltage of 12.4 too low or is this standard for the 150 series? It skips slightly some times when starting, presumably due to this low voltage.

            Comment

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