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  1. #1
    Rolling Along
    Join Date
    Sep 2020
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    My DIY lithium battery setup

    I have purchased all of the parts, though not everything has arrived.

    • Lishen 270Ah LiFePO4 batteries, Qty 4. $438
    • Battery Case. $94
    • Overkill 4S BMS 120A. $125
    • Compression Lugs, 2 AWG 5/16", Qty 10. $14
    • 2 AWG cable, 5 ft ea red/black. $28
    • 3/4" shrink tube, red & black, $11
    • 110A Class T Fuse w/block. $50


    All prices listed are all-in, including shipping.

    Not everything on this list is strictly necessary to build a successful battery. E.g. the cells come with bus bars, I could just use those, but I wanted flexible connections. There are cheaper BMS options that can be ordered along with the battery cells and they probably work just as well. The battery case is really expensive due to shipping cost, and there are cheaper ways to do it, but I wanted a finished product that I could drop into the same spot my FLA batteries are now.

    The only thing I do not have yet are the battery cells themselves, and I don't expect those to arrive for another six weeks or so.

    I will post pictures later of the items that I do have, as well as the batteries when they arrive, and then I will document the build process and final results.

    In addition to the DIY battery, the rest of my system, at least for this season, looks like this:

    • Victron SmartSolar 100/20 MPPT charge controller, to replace the Furrion 25A simply because I'm a nerd and I want to see the daily performance of the panels.
    • Victron Phoenix 12 250VA inverter, just to run the television when we boondock. The only other device we'd use AC for is the microwave, and we decided it wasn't worth the extra $1200 to get an inverter/charger.


    Future plans include most likely replacing the Furrion panel with 2 or 4 180W panels (not Furrion). First I want to see what the 165W panel is worth in practice. I may also upgrade the converter to a lithium-capable model, but I'm still on the fence about it. As long as it won't hurt the LFP batteries, just charge them to only ~70%, then I may be satisfied with letting the solar charger top them off to 100%.
    Last edited by rootusrootus; 03-23-2021 at 02:09 PM.
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