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  • Dual Battery Information Overload

    OK, I've just had approval from SWMBO to get myself a dual battery system, my Xmas present
    I've read loads of threads on this, but I have some specific questions.
    Situation, 2008 D4D Prado GXL.
    I would like to run fridge and a second 12v socket in the rear, plus an anderson plug to charge a third battery and or run power to a camper (next on my list).
    My first question is, do I run ONE cable from the engine bay to the back and then run wiring from a central location, or do I need to run one cable for each connect, 2 x 12v sockets and the Anderson plug?

    Next, I'd like personal experiences with battery trays. I am looking at the Offroad down under tray, anyone had any issues with this?

    Soledoid will either be an SC80 or Redarc SBi12... I also plan on getting the voltage booster 'fuse'...

    Thanks in advance..

    Mark
    D4D Prado GXL - 2014. 2" OME lift, ARB Deluxe Winch bar, ARB under body protection plates, ARB EZ Deflator, Weaco fridge, Matsen fridge on slide, BFG A/T's, ARB CKMA12 compressor, Oztrail side awning with LED lights PLUS canvas extension, Lightforce XGT's.. Oricom UHF380, GME AE4017

  • #2
    Re: Dual Battery Information Overload

    Yep,

    I installed one of those trays in our V6. Tray is sturdy and all the holes lined up. No issues so far.

    Wil

    Comment


    • #3
      Re: Dual Battery Information Overload

      Originally posted by MDSimpson
      I would like to run fridge and a second 12v socket in the rear, plus an anderson plug to charge a third battery and or run power to a camper (next on my list).
      My first question is, do I run ONE cable from the engine bay to the back and then run wiring from a central location, or do I need to run one cable for each connect, 2 x 12v sockets and the Anderson plug?
      You could do either mate, so long as each part of the circuit has adequately sized cable (allowing for voltage drop) and the correct protection - whether the protection used be a fuse of manual/auto restable circuit breaker is your choice.
      Unfortunately, at my computer (work) I am unable to upload the electrical drawing i just made with two alternatives...

      Assuming 1 cable:
      Say you want 50A anderson plug and 6-way distrution fuseblock (rated at 100A). at the aux battery connect a circuit breaker rated for 150A, run one cable to rear (must be rated at greater than 150A) connect this to one 50A circuit breaker and to one 100A circuit breaker. From the 50A run cable to anderson plug (this cable rated for greater than 50A, and from the 100A cb run cable to distribution block (must be rated for 100A). From the distribution block you can run to the fridge, extra sockets, an inverter, etc etc, all on separate circuits with suitable cables and fuses for each.

      Assuming 2 cables:
      Againt with the 50A anderson example and 6-way distribution fuse block, at the aux battery connect 2 circuit breakers - one at 50 amp, and the other at 100A, run two cables - must be rated each at greater that the circuit breaker they are connected to. the 50A goes dierectly to the anderson plug and the 100A goes direct to the 6-way in the rear of the vehicle. again, then from the distribution you can connect whatever you like with suitable cables and fuses to maintain ratings.

      If the fuseblock has a earth terminal on it then this must be connected to body earth with (minimum) same sized cable as used for the supply, and same for anderson plug! However, a return earth direct to the battery is also an option if a good earth cannot be achieved elsewhere. Will try to add a diagram to this post later on - will make it a little clearer... The protection sizes I have used are for example only, and cable sizes are determined by the rated protection and potential voltage drop...

      There are many ways to do this, many people will have different ideas - this is just one of them. For the purposes of your question it is more personal choice than can or can't! Best off searching the threads on dual battery installations and power in the rear until you find one that suits your needs and doing something similar.

      Matt
      2014 D4D 150 GXL Automatic - CHARCOAL

      Comment


      • #4
        Re: Dual Battery Information Overload

        Hi MD, lucky you, better than a 6 pack of undies.

        As Matty and loz says, there are many different ways and you'll get many different opinions. My way is to look at several different options, see what I think makes logical sense, and pick the best bits out and then do up a plan.

        My experience is :-
        I gather you are stating from scratch. So first is what battery tray. I have down under tray and it is rock solid, I think better than most.

        What battery: I went for a no mtce calcium "Allrounder" brand from TJM. Good price and low weight for a 100ah but has never run the 40l Waeco for more than 60 hrs without needing to then be charged. I have used a Full River AGM battery and it can run the fridge all week, but it weighs 36 kg and if you have insurance cover for the hernia operation go right ahead. Also could cause issues with inner guard at mounting point.

        Dual Battery Relay. Many go for the Redarc so must be good. I went to local 12 V specialist shop and they use a NZ built Voltage Sensitive relay. They maintained that they had used it a 1000 times with no problems. Must be good also. Works OK for me (touch wood).

        Fitting. I fitted up the battery tray, bought and installed the battery, and the took the truck to the abovementioned 12v shop, and got them to wire up. Did a real pro job a lot better than I could, proper shrink fit everywhere, all covered in split loom. They have heavy duty cable crimpers etc etc. Costs a bit, but hey you've got permission. Just make sure that they explain to you what they have done and you understand where the fuses and circuit breakers are and why.

        Remainder is as per Matty and Loz comments. Have fun and enjoy the coldies from the fridge. Also remind wifey each time she has a cold wine out camping what a good investment that the dual battery was. :lol: :lol:
        D4D, toothbrush, soap, shampoo, thongs, stubbie cooler, fishing rods and rod holder, tide chart, bundy, snatch strap.

        Comment


        • #5
          Re: Dual Battery Information Overload

          Matt, Will. Thanks for the input, every bit helps.

          Ginger, starting from scratch.
          I have also thrown in some more confusion, do I pay, through the nose, to get it installed or buy the bits and DIY?
          DIY, I was looking at the OffRoad Down Under tray, Redarc or Traxide SC80, but this could be where I draw the line between being capable at DIY and not a sparky.

          Out of interest, what have others paid for their Dual Battery installs?
          One quote included dual sockets in back, and an Anderson plug as well.
          D4D Prado GXL - 2014. 2" OME lift, ARB Deluxe Winch bar, ARB under body protection plates, ARB EZ Deflator, Weaco fridge, Matsen fridge on slide, BFG A/T's, ARB CKMA12 compressor, Oztrail side awning with LED lights PLUS canvas extension, Lightforce XGT's.. Oricom UHF380, GME AE4017

          Comment


          • #6
            Re: Dual Battery Information Overload

            Hi MDSimpson, what do you think your skills are up to.

            As far as fitting a dual battery kit goes, if the instructions are up to scratch, installing a dual battery system is actually more like carrying out some plumbing.

            You should not need to have any electrical skills other than be able to read a digital multi meter and thats only if you want to see how everything works after it’s fitted.

            Even if you have no experience with either running cable through your specific vehicle or how to use a multi meter, there’s plenty of people on this site who would only too happy to talk you through an installation.

            Comment


            • #7
              Re: Dual Battery Information Overload

              Originally posted by drivesafe
              Hi MDSimpson, what do you think your skills are up to.

              As far as fitting a dual battery kit goes, if the instructions are up to scratch, installing a dual battery system is actually more like carrying out some plumbing.

              You should not need to have any electrical skills other than be able to read a digital multi meter and thats only if you want to see how everything works after it’s fitted.

              Even if you have no experience with either running cable through your specific vehicle or how to use a multi meter, there’s plenty of people on this site who would only too happy to talk you through an installation.
              If you put the question out there mate for some help, you might find that there would be a volunteer or two to give you an actual hand with the installation also (assuming there are people nearby)...

              Sure beats doing it by yourself, and a good oppertunity to enjoy a few beers and make new friends...
              2014 D4D 150 GXL Automatic - CHARCOAL

              Comment


              • #8
                Re: Dual Battery Information Overload

                Drivesafe, I have a print out of your diagrams, so hopefully, it is that easy to follow, I have a multimeter and know how to use it....

                Matt, it would be great if there were a tech day close by, NSW Central Coast, I have skills in other areas I am looking to trade

                Got another quote today, over $1100.00.... Over the top, says my gut...
                D4D Prado GXL - 2014. 2" OME lift, ARB Deluxe Winch bar, ARB under body protection plates, ARB EZ Deflator, Weaco fridge, Matsen fridge on slide, BFG A/T's, ARB CKMA12 compressor, Oztrail side awning with LED lights PLUS canvas extension, Lightforce XGT's.. Oricom UHF380, GME AE4017

                Comment


                • #9
                  Re: Dual Battery Information Overload

                  $1100!, that sounds hefty. It is a relatively simple job. After I fitted tray and battery, cost by sparky was $290, which included all wiring, fuses, ancilliaries and labour. I fitted all wiring to the back myself. There are some great photos and info in Pradopoint on getting the wiring under the trim and no point paying $60 - $90 per hr for that kind of work.
                  D4D, toothbrush, soap, shampoo, thongs, stubbie cooler, fishing rods and rod holder, tide chart, bundy, snatch strap.

                  Comment


                  • #10
                    Re: Dual Battery Information Overload

                    Originally posted by Gingerbeer
                    $1100!, that sounds hefty. It is a relatively simple job. After I fitted tray and battery, cost by sparky was $290, which included all wiring, fuses, ancilliaries and labour. I fitted all wiring to the back myself. There are some great photos and info in Pradopoint on getting the wiring under the trim and no point paying $60 - $90 per hr for that kind of work.
                    I would have to agree, $1100 for the install would seem over the top! But i don't know the details of the quote, if they are supplying the battery, isolating solenoid, redarc BCDC1220 charger along with the other consumables required for the job - then it's probably not too bad price wise. If you have to supply everything and then they was $1100 just for the install - tell them they're dreaming!!! Price will be heavily dependant on how and what you want to include for your dual battery system and what you want, in regards to power, available in the rear.

                    Like drivesafe says, you'll not be short on advise around here, more than enough people willing to help!

                    Originally posted by MDSimpson
                    Matt, it would be great if there were a tech day close by, NSW Central Coast, I have skills in other areas I am looking to trade :wink:
                    Unfortunately, I'm a little too far away for a tech day mate. But put the word out when your ready...

                    Matt
                    2014 D4D 150 GXL Automatic - CHARCOAL

                    Comment


                    • #11
                      Re: Dual Battery Information Overload

                      Hi Mark,

                      I had the same "Dual Battery Information Overload" thoughts as you, but after reading through this site and others I decided to have a go myself. I haven't finished yet mainly due to being too busy, but only have to get the 2nd battery and connect it. Also have not got the fridge yet, which was the main reason for doing it, (hopefully for Christmas).
                      But I have to say it was not hard, lots of fun and you can take the time to do it exactly the way you want it!! The hardest part was getting all the parts together. That's one of the advantages of paying to have it done, I suppose.

                      Good Luck.
                      2014 Kakadu V6, HR Towbar, MSA seat covers, Scan Guage II.

                      Comment


                      • #12
                        Re: Dual Battery Information Overload

                        Thanks everyone. It's good to know it's not just me suffering the overload of info.
                        I will give it a go myself, here is my plan.

                        Offroad downunder tray.
                        Deep Cycle battery (from BCF, on sale)
                        Either Projecta solenoid (as it comes with wiring kit) or Traxide SC80.
                        I will also be adding the Voltage Regulator, Anderson Plug and an Alzone power distribution box, rear dual outlet, fridge and inverter.

                        Can of Tektyl is also on the cards..

                        Xmas will be busy for me and the Prado, I am also adding a rear table and bash plate. Who knows, may even get a chance to get it dirty...
                        D4D Prado GXL - 2014. 2" OME lift, ARB Deluxe Winch bar, ARB under body protection plates, ARB EZ Deflator, Weaco fridge, Matsen fridge on slide, BFG A/T's, ARB CKMA12 compressor, Oztrail side awning with LED lights PLUS canvas extension, Lightforce XGT's.. Oricom UHF380, GME AE4017

                        Comment


                        • #13
                          Re: Dual Battery Information Overload

                          When you run the wires to the back of the truck, an overkill on wire size will allow you to 'ADD' more stuff to it down the track, it will save you having to re-do it in the future.
                          Nick

                          2004 TD GXL ARB bar, warne winch, safari snorkle, front+rear diff locks, under bonnet shower, diff breathers, lightforce HID's, supernova HID's, roof top tent, awning, custom drawers, DVD headrests, TP09X1, list goes on

                          Comment


                          • #14
                            Re: Dual Battery Information Overload

                            Nick, thanks for that, I may need to 'add more stuff' later.. Planning ahead..

                            Here is another question, does anyone have any photos on the tray from FNB 4WD? Their site advertises as it as Drivers Side Rear of engine bay...

                            Anyone??
                            D4D Prado GXL - 2014. 2" OME lift, ARB Deluxe Winch bar, ARB under body protection plates, ARB EZ Deflator, Weaco fridge, Matsen fridge on slide, BFG A/T's, ARB CKMA12 compressor, Oztrail side awning with LED lights PLUS canvas extension, Lightforce XGT's.. Oricom UHF380, GME AE4017

                            Comment


                            • #15
                              Re: Dual Battery Information Overload

                              Originally posted by MDSimpson
                              Here is another question, does anyone have any photos on the tray from FNB 4WD? Their site advertises as it as Drivers Side Rear of engine bay...

                              Anyone??
                              Heres a link to the product on the FNB-4WD website: AUXILLARY BATTERY TRAY - TOYOTA PRADO 120 SERIES

                              I sent FNB-4WD an email on sunday, and received a reply just a few minutes ago. I was informed by Mike, that the "DS Rear" location stated in in the product webpage was a typo - it is infact mounted in the toyota provided aux battery location, "DS Front". This has since been corrected.

                              The battery tray in these images suit a Diesel Toyota Prado 120 Series, and fit a N70 style battery.


                              Thanks goes to Mike, from FNB-4WD in Mount Barker, SA, for taking some of his time to provide us with these images!

                              Matt
                              2014 D4D 150 GXL Automatic - CHARCOAL

                              Comment

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