Battery choice?

usaousao Registered Users Posts: 11 ✭✭
What type of battery is a good choice for off-grid system?
I hear some noise about using Lithium 18650 cells.
This appears to be a home-made option for creating multiple series/parallel loops using small replaceable 18650 cells which can be had for very cheap.
How does this stack up cost-wise and replacement wise against deep cycle lead/acid from Trojan or Surrette?


  • EstragonEstragon Registered Users Posts: 4,495 ✭✭✭✭✭
    If you want to rig up a large homemade array of lithium cells, please keep a respectible distance from neighbours.

    Lithium based batteries are getting closer to lead acid in some applications, but they aren't suitable for an on-the-cheap diy solution yet IMHO.
    Main daytime system ~4kw panels into 2xMNClassic150 370ah 48v bank 2xOutback 3548 inverter 120v + 240v autotransformer
    Night system ~1kw panels into 1xMNClassic150 700ah 12v bank morningstar 300w inverter
  • Marc KurthMarc Kurth Solar Expert Posts: 866 ✭✭✭✭
    edited June 2017 #3
    When questions like these are asked:
    "Is this a good choice?" Or "How does is stack up.....?

    The answers are always in the details. Things like system size, intended use and your experience are the beginning :)

    I always have more questions than answers. That's the nature of life.
  • usaousao Registered Users Posts: 11 ✭✭
    It's a smallish system, dedicated to run bitcoin miners. Im looking at less than 10A @ 12V.
    I had a grid tie system about 10 years ago, but it was a real bear to maintain the batteries. I was hoping the lithium batteries would be cheaper/easier as there is no monitoring/maintenance of the acid levels, just swapping out single cells as needed.
    Ive seen youtube videos showing how to build them and they make holders to allow easy swapping.

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