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Automatic Charging Relays for dual battery system

Discussion in '3rd Gen. Tacomas (2016+)' started by OnHartung'sRoad, Nov 29, 2018.

  1. Nov 29, 2018 at 7:36 PM
    #1
    OnHartung'sRoad

    OnHartung'sRoad [OP] -So glad I didn't take the other...

    Joined:
    Jul 24, 2017
    Member:
    #224878
    Messages:
    5,493
    Somewhere in the Mojave Desert...
    Vehicle:
    2017 Tacoma TRD 4x4 (formerly 2002 TRD 4x4, 1995 4x4 4Runner, 1985 4x4 Toy PU) ... and RIP’s (rust in pieces) to a Bronco II 4x4 & S10 Blazer 4x4
    Reading the dual battery posts like this
    https://www.tacomaworld.com/threads...ts-see-them-multiple-batteries-thread.295653/
    and am wondering what, besides a remote isolation controller switch (and price), is the difference between using one of these:

    https://www.amazon.com/Blue-Sea-Sys...e+seas+acr&dpPl=1&dpID=51uKM7X4wwL&ref=plSrch

    vs

    https://www.amazon.com/Blue-Sea-Aut...e+seas+acr&dpPl=1&dpID=51-5jdsezAL&ref=plSrch

    for using it to keep a double battery system charged with my truck? The price difference is a lot, so I’m wondering if the less expensive SI-ACR will work. I want to use the second battery for accessories such as a winch, diesel RTT heater, etc.
     
    Last edited: Nov 29, 2018
  2. Oct 11, 2019 at 3:53 AM
    #2
    IsotopeGear

    IsotopeGear Member

    Joined:
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    Jim
    Vehicle:
    2019 Tacoma Off Road (Cement)
    Since I am researching a similar thing I came across your post. Sadly no replies...

    Did you ever find out/install something similar? https://www.amazon.com/Blue-Sea-Sys...int=&hvlocphy=&hvtargid=pla-570648928063&th=1

    I was wanting to put in a second battery for HAM, lights, fridge, etc and this looked like a good solve (vs expensive commercial dual battery systems). Another question is can I have dissimilar batteries connected (ie, OEM start battery and add something like an Oddysey AGM and isolate/charge through an ACR). Reading elsewhere looks like it is OK, the ACR isolates and charges as needed.

    Am reading through the 127 page Dual Batteries post now ... :)
     
    Last edited: Oct 11, 2019
  3. Oct 11, 2019 at 7:59 AM
    #3
    sakibomb

    sakibomb Well-Known Member

    Joined:
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    #181529
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    Male
    First Name:
    Kevin
    DFW Texas
    Vehicle:
    2016 TRDOR DCSB 6MT
    Dual Batteries Blue Sea Fuse Panel
    I have the SI-ACR controlling a deep cycle battery with stock main battery. I'm using a marine battery switch to combine/isolate the batteries. Would be nice to have that switch inside the cab, but if I need to combine the batteries, I'll take the time to open the hood.
     
  4. Oct 11, 2019 at 8:07 AM
    #4
    Speedfreak

    Speedfreak Well-Known Member

    Joined:
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    Dave
    B.C. Canada
    Vehicle:
    2017 Tacoma TRD Sport DCSB 6MT, Blazing Blue Pearl
    URD Short Shifter, AVS Vent Visors and Bakflip MX4Tonneau Cover.

    There are lots of options that will work. My motorhome uses a simple starter style solenoid to isolate the house battery from the starting battery. It gets triggered by the charge output of the alternator. There are diode style insulators and newer smart insulators. They will all do the same thing. They just do it a bit differently. Budget will ultimately be the deciding factor but you can't go wrong with any option. The solenoid on my motorhome is 31 years old and still functions fine.

    https://m.littelfuse.com/industries...ttery-related-products/battery-isolators.aspx
     

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