Definition of "Rated Charge Power" of a charge controller

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  • Tedx
    Junior Member
    • Aug 2018
    • 13

    Definition of "Rated Charge Power" of a charge controller

    My charge controller manual records the Rated Charge Power of my controller at 1040w at 24v. It records my Max PV Array at 3120w at 24v. So, what is meant by Rated Charge Power? Is that the max amount of current my controller can process and any more requires an additional charge controller to benefit from? Is it the optimum current for my controller? Or is it something else I'm supposed use my clairvoyant abilities to gleen? I have no clairvoyant abilities.
  • Sunking
    Solar Fanatic
    • Feb 2010
    • 23301

    #2
    I seriously doubt your charge controller can handle 3120 watts @ 24 volt battery as that would require a 130 amp controller or 2 x 65 amp controllers. Just to handle 1040 watts would require a 40 amp controller. No magic or clairvoyant abilities, just simple 5th grade math.
    MSEE, PE

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    • littleharbor
      Solar Fanatic
      • Jan 2016
      • 1998

      #3
      EP max panel power chart.jpg Your controller can tolerate over paneling without damage. It will never output over 40 amps. Many people will overpanel in marginal solar areas to ensure charging on a more reliable basis. Overpaneling will also give you a longer charging day by giving you full power earlier and more available power later into the day. Opportunity loads like laundry, waterpumping and such can make use of this available power while your batteries are finishing off and don't need much current.
      2.2kw Suntech mono, Classic 200, NEW Trace SW4024

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