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Dual Battery Setups! Let's see them! Multiple Batteries Thread!

Discussion in 'Technical Chat' started by MJonaGS32, Sep 20, 2013.

  1. Nov 13, 2018 at 12:50 PM
    #2121
    DaveInDenver

    DaveInDenver Not Actually in Denver

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    Assuming this Hilux has a 1KZ or 1KD and that's a left hand side snorkel.
     
  2. Nov 13, 2018 at 1:49 PM
    #2122
    crymes

    crymes Well-Known Member

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  3. Nov 13, 2018 at 6:10 PM
    #2123
    Toyotico

    Toyotico Well-Known Member

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    The steering wheel is on the wro.. right side of the truck :rimshot:
     
  4. Nov 13, 2018 at 7:20 PM
    #2124
    DaveInDenver

    DaveInDenver Not Actually in Denver

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    iur.jpg
     
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  5. Nov 13, 2018 at 10:19 PM
    #2125
    Thaitoy

    Thaitoy 2003 3.0 turbo diesel. 6in lift w 33's

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  6. Nov 14, 2018 at 4:51 AM
    #2126
    Toyotico

    Toyotico Well-Known Member

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    Probably drive on the other side of the road too! Ok back to batteries n stuff
     
  7. Nov 29, 2018 at 1:21 PM
    #2127
    HerT4R

    HerT4R Nomadic

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    '10 4RUNNER TE (SOLD)
    Alright guys, I have been reading and culling this thread for a good part of the day and I want to make sure that I have my switch wiring in order before I burn my truck down.
    1. The only wires I have to fish through the firewall are the ML-ACR Red, ML-ACR Yellow, and 1 wire from the House battery (via a 2amp fused line) to connect to post 8+ on the switch.
    2. When I wire up the fuse all I have to do is follow the blue sea diagram and ensure the house battery wire is connected to +8 and then 3.
    3. Can I avoid fishing the house wire across the engine bay and into the cab via the drivers side firewall nipple? This doesnt seem like much, but it is for me and I am trying to avoid it if possible. Thoughts? Can i connect an acc hot line via fuse tap from the driver footwell fuse panel INSTEAD of going from house battery?

    BlueSeaML-ACRSwitchControlWiring.jpg
     
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  8. Nov 29, 2018 at 4:13 PM
    #2128
    BEAR_KNIFE_FIGHT

    BEAR_KNIFE_FIGHT bearly famous

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    I put mine here:

    0328181204.jpg
     
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  9. Nov 30, 2018 at 4:12 AM
    #2129
    Toyotico

    Toyotico Well-Known Member

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    I installed the meso and don’t want to change it for the sdhq Mount now. So I’ll have to find another way. I like yours tho. That is clean looking. 2AAA840A-F89E-4684-9262-54D26DAF43DF.jpg

    Also this is happening. Might be spending some more overtime money. Anyone have experience with north star 35s? Looking into those. https://www.tacomaworld.com/threads/northstar-battery-group-buy-7-0.579865/
     
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  10. Nov 30, 2018 at 6:47 AM
    #2130
    BEAR_KNIFE_FIGHT

    BEAR_KNIFE_FIGHT bearly famous

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    It actually doesn't fit stock, I had to do some dremelling to get it to fit. If you have any 'tall toyota' switch openings, you can modify them to fit.
     
  11. Nov 30, 2018 at 7:08 AM
    #2131
    Toyotico

    Toyotico Well-Known Member

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    @BEAR_KNIFE_FIGHT i got ya. Yea we’ll have to figure something out. Preciate your help
     
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  12. Dec 11, 2018 at 7:59 AM
    #2132
    Gaunt596

    Gaunt596 Resident Otaku

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  13. Dec 11, 2018 at 1:10 PM
    #2133
    MJonaGS32

    MJonaGS32 [OP] MJ on a GS

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    Sorry for the late reply. Not sure if you've already tackled this.

    1. Correct. Although technically you don't have to have a separate wire for the House battery. You can simply tap into anything under your dash since they are all connected to your house battery. I recommend going into the fuse box under the steering wheel and use a tester to see which one is a constant hot, then use one of these to tap into it.

    2. See #1

    3. See #1

    Good luck with the install.
     
  14. Dec 31, 2018 at 11:43 AM
    #2134
    Atl-atl

    Atl-atl Well-Known Member

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    Ive been reading through this thread for a few days, thanks to everyone that has contributed more info than I'll ever understand hah! Im putting together a dual battery setup for my Taco with the intent being that the aux battery is basically the house battery for my Four Wheel Camper, but kept underhood instead of inside the camper, for weight distribution and easy of maintaining its charge. Im planning to use a Blue Sea SI-ACR so that the battery will always charge when I drive the truck. At this point in time the camper is the only thing the aux battery will be used for. I included a greyed out section for future use, using a Blue Sea 5511E switch and fuse block. I don't see myself needing to jump the truck off the aux battery and if I do, I can just unbolt the ACR and hook up jumper cables. I don't have a winch, lights or any other real accessories, save for a CB which is why I am not planning to run the switch and fuse block right now.

    My only real concerns at the moment are wire and fuse/breaker size for the positive wires connecting the batteries to the ACR. I plan to put the ACR on top of the fuse box next to the factory battery and the aux battery will go in the empty space behind the stock intake. Is #2AWG and 150amp fuse or breaker enough? Blue Sea recommends #1AWG for charging capacity of 120amps. Since my alternator is 130amp does that mean I need to run larger wire? Everyone on here seems to use 2/0 but that is SO much larger than the factory wiring. Is this just a "better safe than sorry" situation? running 2/0 and 200amp breakers gets really farking expensive.


    This is the power converter in my camper. The wires coming out of it that connect to the house battery are small, I think only 16awg. I hooked it directly to my deep cycle battery and everything works just fine but thats only a 3 or 4 foot run. Im not about to rewire the converter but I need to run the power wire all the way up to the engine bay and I imagine that will require a larger wire. Its my understanding its not ideal to run different diameter wires.
    [​IMG]

    This is my diagram right now.
    [​IMG]
     
    Last edited: Dec 31, 2018
  15. Dec 31, 2018 at 12:03 PM
    #2135
    tacoma16

    tacoma16 Well-Known Member

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    For a 6’ run I would beef up the wiring. Stock wire is 2awg but the run is less than a foot or so. With that long of a run the wire will heat up. I personally went 1/0 and 150 amp fuse (IRC) for the run from the engine area to the back of the truck (bed) where the second battery is. I am under the assumption that your second battery is 6’ away therefore could be under the 150amp load of starting. Therefore when they are connected similiar charges will be occurring so you want the appropriate wire.
     
    Last edited: Dec 31, 2018
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  16. Dec 31, 2018 at 12:05 PM
    #2136
    SR-71A

    SR-71A Define "Well-Known Member"

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  17. Dec 31, 2018 at 12:20 PM
    #2137
    Atl-atl

    Atl-atl Well-Known Member

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    Thanks, yes, the aux battery will be 6' away from the factory battery. Stepping up to 1/0 seems reasonable for connecting the batteries and ACR.


    Thanks, that does help, I think. On the left side of the chart it shows "Amps @ 13.8volts" is this referring to the output(charging) capacity of the alternator, or the output(cranking) capacity of the battery? Those numbers are significantly different and they don't specify what the chart represents. If its alternator output, the chart says I would only need to run 6awg or 4awg which is significantly smaller than what everyone on here recommends. If its battery output, the left side of the chart doesnt go nearly high enough in amperage.
     
  18. Dec 31, 2018 at 12:28 PM
    #2138
    Boomkanani

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  19. Dec 31, 2018 at 2:48 PM
    #2139
    Atl-atl

    Atl-atl Well-Known Member

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    Thanks for the clarification about the left column. The max amp draw from my camper is low, 15amps if I were using all the electronics at the same time. Thats not my concern though, the wiring connecting the two batteries is my concern. All the charts I see online show that 6awg or 4awg wire is sufficient for my alternator (130amp) and the length of run I need (6') but everyone on here says to use at minimum 1/0 and ideally 2/0. Why? Is this because the batteries are capable of much higher amps for shorter periods of time, cold cranking amps for example?
     
  20. Dec 31, 2018 at 3:04 PM
    #2140
    YamaDirtrider

    YamaDirtrider Custom bumpers @FORT-ifyRigs

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    What hasn't been modified?
    @Atl-atl i haven’t noticed any issues with mine, I’m running 2awg with no fuse.
    It’s thick enough to start the truck solely on the aux battery. I added grounds to the frame and engine block of the aux battery.
    Also not a bad ided to run a thicker cable to be back(camper) for accessories. For instance I bough 50’ of wire and used most of it.
     

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