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My LiFePO4 Battery setup

Discussion in '5th Gen 4Runners (2010+)' started by shelt, Jan 14, 2022 at 12:17 PM.

  1. Jan 14, 2022 at 12:17 PM
    #1
    shelt

    shelt [OP] New Member

    Joined:
    Jun 1, 2021
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    First Name:
    Rich
    NorCal
    Vehicle:
    2013 Trail
    I just finished this project and thought it might be useful to generate ideas for others. My parameters were:

    - I didn't want the LiFePO4 battery in the engine compartment
    - I needed to be able to convert back to a (mostly) stock 5-seat vehicle when needed
    - I sleep in the vehicle (comfortably too!)
    - I use the vehicle for Sheriff Search and Rescue, camping and fly fishing trips. I may be parked in one spot several days.
    - I run a Dometic CFX 35 fridge, and recharge various SAR tools, radios, computers, lighting, etc at times
    - I wanted "always on" power in the rear of the vehicle, but wanted to have that be Lithium or AGM starter as desired.
    - I wanted to be able to charge the LiFePO4 at ~20A from my alternator or from my 100W portable solar panels

    So...here's where I ended up:

    - I have an X2 AGM starter battery with battery boost diode. This can feed my "always on" power panel in the rear (when desired) and be charged by solar.
    - I have a Renogy 100Ah bluetooth LiFePO4 battery mounted/anchored in a cheap battery case behind the driver seat. This can feed the "always on" power panel when needed. It can also be charged by alternator or portable solar. I can monitor battery charge state with their bluetooth app.
    - Fridge and LiFePO4 can be removed from the vehicle and run at a campsite if desired.

    I made a representation of the wiring diagram below. Essentially, I ran fused 6awg welding cable from the AGM starter battery along the driver side back to the "breakaway" rear tray. I mounted a Blue Sea busbar to the underside of the tray. From there I ran a 10awg cable that pops out with an Anderson powerpole connector at the rear of the driver-side passenger door. From there, another short Anderson cable allows me to connect it to the input of the LiFePO4 Victron 12-12 18A DC-DC smart charger. This gives ~20A of DC alternator charging for the LiFePO4 battery.

    Next, I ran 10awg cable from the busbar to the rear "jack compartment". That is terminated with another Anderson connector. I installed a Blue Sea 6-circuit fuse panel in there. Note - the vehicle jack can still be removed without issue. The input to the fuse panel is an Anderson connector. So, there are three Anderson-terminated cables here - one is on the fuse panel, one is an AGM starter battery cable, and the third is the LiFePO4 battery cable. I will normally leave the LiFePO4 connected to the fuse panel. In "stock" mode, I can connect the AGM cable to the fuse panel and remove all the LiFePO4 battery gear.

    The fuse panel feeds the rear "always on" power panel. This is also Blue Sea. It contains a power switch with an integrated 15A breaker. Next are 2x30A Anderson powerpole outlets, which can also be used as inputs from an MPPT portable solar charger. They are wired directly to the fuse panel and are not switched. Almost all of my 12V devices have Anderson connectors so this works great. The next outlets are a USB-A and USB-C PD charger with an integrated voltmeter (Powerwerx). The final outlet is an Engel/ARB/Dometic 2-pin 12V power connector. Both of those panel-mounted devices are controlled by the panel switch. I skipped the unreliable 12V cigarette lighter outlet.

    I could have saved one wire run by using a fancy all-in-one MPPT/DC-DC device that might fail over from LiFePO4 to AGM when needed, but most of those had issues including very low open circuit solar panel input voltage limits. I use a Victron MPPT charger for my 100w Rockpals panel, and that puts out a solid 95W or so in full sun.




    IMG_5130.jpg
    4runner layout.jpg
     
    Last edited: Jan 15, 2022 at 9:06 AM
  2. Jan 14, 2022 at 12:25 PM
    #2
    nonuniform

    nonuniform New Member

    Joined:
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    Vehicle:
    2021 TRD OR
    Great write-up, and nice installation. Thanks also for telling me what those plug-in connectors are called!
     
    shelt [OP] likes this.
  3. Jan 14, 2022 at 2:00 PM
    #3
    JaSC

    JaSC New Member

    Joined:
    May 30, 2021
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    Anderson, SC
    Vehicle:
    Black 2018 4Runner TRD Off Road Premium, crawl control and MTS
    ToyTec Lift, Dual Batt Redarc. Rear safe drawer, console safe, Aux 2004 JGC fuse box
    Bread rack shelf is a great idea.
     
  4. Jan 14, 2022 at 2:25 PM
    #4
    peter2772000

    peter2772000 New Member

    Joined:
    Feb 26, 2020
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    First Name:
    Peter
    Montreal/Cape Coral
    Vehicle:
    2012 X6/2013 ML350BT/2019 TRD PRO/2019 Ram Rebel
    GTR high and low beams, Victory rear carrier, remote oil filter, Dimple magnetic oil pan plug, interior LED lights, T9 radio, driver side grab handle, 305/50R20 Grabber A/TX on Helo 20 x 9's
    Nice write-up. Thanks for posting
     
    shelt [OP] likes this.
  5. Jan 15, 2022 at 9:01 AM
    #5
    shelt

    shelt [OP] New Member

    Joined:
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    Rich
    NorCal
    Vehicle:
    2013 Trail
    It's pretty handy, and a lot cheaper than a drawer... You can order custom sizes at www.TheShelvingStore.com . I have the OEM sliding tray (with some added tie-downs), so the fridge & shelf slide out as needed.
     
  6. Jan 15, 2022 at 9:08 AM
    #6
    BionicRandy

    BionicRandy New Member

    Joined:
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    Randy
    Vehicle:
    2012 Black SR5 aka the Batmobile
    3” Lift, 285 Toyo ATs, dual batteries, racks and ladders, molle panels and tools and other cool fun stuff.
    That’s awesome! Very well planned set up. I wouldn’t mind seeing your solar panel set up too if you don’t mind.
     
  7. Jan 15, 2022 at 10:27 AM
    #7
    shelt

    shelt [OP] New Member

    Joined:
    Jun 1, 2021
    Member:
    #21741
    Messages:
    9
    Gender:
    Male
    First Name:
    Rich
    NorCal
    Vehicle:
    2013 Trail
    My solar is just a Rockpals portable folding panel. I connect it to a Victron MPPT charger with Anderson connectors, then plug it into the Anderson outlets in the power panel. I have a long extension cable so I can park in the shade while the panel is in the sun...
     
    Last edited: Jan 15, 2022 at 10:32 AM

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