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Charge Controller Setting for battery

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  • #46
    Originally posted by monogram View Post
    Hi Matrix,
    Thank you for your advise.[LIST][*]If I set the Boost voltage to 30.2V, will it be too high for 24V batteries bank?[*]If I have enough sun time, does increase Boost Time is a better option for the batteries?[*]How to know if I have enough sun time?
    Battery Hydrometer.


    Originally posted by monogram View Post
    • The batteries are about 2ft below the controller. I don't remember the wire size but I think it's small wire. What is the correct gauge size for controller to 215A batteries?
    What size is the Controller?

    20 to 30 amps = 10 AWG
    40 to 80 amps = 6 AWG

    MSEE, PE

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    • #47
      Doubt you have this option on your controller.

      Vent your batteries to the outdoors if not already.

      As I said, use the largest wire you can fit in the controller.

      2.2kw Suntech mono, Classic 200, NEW Trace SW4024

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      • #48
        Originally posted by littleharbor View Post
        Doubt you have this option on your controller.
        Yes, my controller does have option to set battery AH. I currently set it to 215AH as battery listed. Do you mean I need to increase that AH number up?

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        • #49
          Setting the ah. of your battery doesn't necessarily set ending amps of absorb, er, Boost stage. You already mentioned it's set at 120 minutes. If you can set ending amps it should be 2 % of your ah. rating ie; 4 amps. If you cant do this you might see if changing your battery ah size changes the 120 minutes.
          2.2kw Suntech mono, Classic 200, NEW Trace SW4024

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          • #50
            Originally posted by littleharbor View Post
            Setting the ah. of your battery doesn't necessarily set ending amps of absorb, er, Boost stage. You already mentioned it's set at 120 minutes. If you can set ending amps it should be 2 % of your ah. rating ie; 4 amps. If you cant do this you might see if changing your battery ah size changes the 120 minutes.
            I'm lost on this, would you please explain it again for me?

            Since the batteries are inside the house which produced the gas when charging, is it OK for me to have battery 10ft away from controller using solar wire 10AWG ?

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            • #51
              Litleharbor give up.
              MSEE, PE

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              • #52
                If you can set ending amps it should be 2 % of your ah. rating ie; 4 amps. If you cant do this you might see if changing your battery ah size changes the 120 minutes
                Hi Littleharbor,
                I'm lost, would you please explain it in more detail. An example is great.

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                • #53
                  I've tried, as Sunking has told you and tried to explain, himself. All I can say is go back and reread what has already been said. Also go and read the stickies at the beginning of the Off-Grid section. Do your best to understand what you've been told. You have been lucky in keeping your loads reasonable. If your controller has info on load control limits, follow it.
                  Good night.
                  2.2kw Suntech mono, Classic 200, NEW Trace SW4024

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