Problem getting battery's fully charged

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  • Mariaan
    Junior Member
    • Sep 2013
    • 2
    #1

    Problem getting battery's fully charged

    I'm having a problem getting my battery's fully charged. I have a 24 V system, 4x230 Amp hour lead Acid 12 V battery's; 6x240 Watts solar panels with a MPPT ss-80c model controller. I use between 1,5 - 1,8 kilowatts / day. My current settings on my controller is Absorption V = 29,2; Absorption Time = 2:00; Float V = 27,6; Equalize V = 31,2; Max Equ Time = 2:00; Equ days = 1.
    Can I change some of these settings on my controller in order to let the battery's charge better? My panels are not charging to their full capacity for more than 3/4 of a day.

    Thank you
    Mariaan
    Tags: None
  • thastinger
    Solar Fanatic
    • Oct 2012
    • 804
    #2
    Your CC tries to eq your battery bank everyday? You should set that to manual and only do an Eq when the SG tells you to. What is the SG of a cell when in float?

    I called my battery manufacturer to get the recommended times for my CC to sit in absorb before it goes to float. You might try to do the same if your 12V batteries are intended for PV use.
    1150W, Midnite Classic 200, Cotek PSW, 8 T-605s

    Comment

    • Sunking
      Solar Fanatic
      • Feb 2010
      • 23301
      #3
      Agree first disable the EQ. With EQ set to on the charger never tries to use Bulk, Absorb, or Float. You are cooking your batteries. EQ should never be used unless specifically needed as it is a OVER CHARGE condition that does permanent damage. Bet you use a lot of water?

      Next set Bulk = Adsorb.

      With that said what make and model number are your batteries? The voltages appear to be way to high, especially Float. Typical Voltages for a Flooded Lead Acid battery are:

      Bulk/Absorb = 28.9
      Float = 26.6
      EQ = 31
      MSEE, PE

      Comment

      • Mariaan
        Junior Member
        • Sep 2013
        • 2
        #4
        Problem getting battery's fully charged.

        Thastinger asked about the SG when it goes in float, the answer is the SG reads 1.20 when the CC goes in float.

        Sunking asked about the battery model and make, it's Exade battery's, the model is 695CZ. No my battery's does not use alot of water.

        I've bought them in May 2013. My inverter are a MLT 300 Aoisis.
        What can I do to solve my problem??

        Comment

        • Sunking
          Solar Fanatic
          • Feb 2010
          • 23301
          #5
          Originally posted by Mariaan
          Sunking asked about the battery model and make, it's Exade battery's, the model is 695CZ.
          What can I do to solve my problem??
          I think you mean Exide 695CZ which there is no such thing that I can find and I know Exide products very well and have a full catalog of current products. .

          Since you said they do not use much water, I can only assume they are flooded lead acid. If correct all your voltages are way too high. Read the owners manual or post a link with the correct owners manual.

          Generically for FLA batteries

          Bulk/Absorb = 28.9
          Float = 26.6
          EQ = 31 DISABLE EQ
          MSEE, PE

          Comment

          • Wy_White_Wolf
            Solar Fanatic
            • Oct 2011
            • 1179
            #6
            Are you sure you're not using more power daily than the panels can replace?

            WWW

            Comment

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