snoobler
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  • Question:

    Can I safely use an MMPT solar charge controller to charge LiFePO4 batteries using a non-PV input to the charge controller?

    For instance, can I connect a simple 36V 10A DC power supply to the PV input on the MMPT solar charge controller to charge my 24V LiFePO4 battery when PV input is not available?
    Tom
    snoobler
    snoobler
    As long as the PS is within the input parameters of the MPPT, it should be fine.
    T
    TomM
    Great, Thanks. I did not think the MMPT could tell the difference between 36V and 10A from a power supply vs 36V and 15A from solar panels.
    snoobler
    snoobler
    It will be frustrated in its efforts to find peak power as it will always come back to whatever your input settings are. :)
    quick Q for U, is it better to have two 20A MTTP controllers feeding a battery bank or one 40A controller?
    D
    doppler
    I would rather have one, just less to set up and keep an eye on but 40 and especially 60 and up they can get pricey
    RCinFLA
    RCinFLA
    Depends on PV panel matching any any variation in their direction and independent partial shading. If mismatch panels or pointed in different directions having separate MPPT controller is much preferable to even a necessity.
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