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A question about 10amp Solar charge controller

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  • A question about 10amp Solar charge controller

    I have a cheap 10 amp pwm Solar charge controller specs here (https://www.solorder.se/image/data/uploads/KLD1210.pdf)

    My load is around 5 amp and I have 12v 7ah battery

    And I want to attach a 5amp power supply to this charge controller (to simulate solar cell and accommodate my load)

    My question is this small battery only needs 2amp maximum for charging but when I attach a 5amp power supply is it going to cook my battery? or the charge controller will adjust itself or If I have to attach 2 amp power supply ?

    Thanks,
    Last edited by bobby78; 04-17-2017, 07:00 AM.

  • #2
    A solar charge controller is just that. Using any other type of DC power source will probably hurt the charge controller as well as the battery.

    IMO it would be simpler to just use a DC battery charger that works with your battery.

    A solar panel is a current source not a voltage source that 5 amp power supply is.
    Last edited by SunEagle; 04-17-2017, 08:56 AM. Reason: added last sentence

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    • #3
      Originally posted by SunEagle View Post
      A solar charge controller is just that. Using any other type of DC power source will probably hurt the charge controller as well as the battery.

      IMO it would be simpler to just use a DC battery charger that works with your battery.

      A solar panel is a current source not a voltage source that 5 amp power supply is.

      Many thanks for the reply

      Actually I was trying to make an easy DIY 12V DC ups system and solar charge controller has everything inside except I need some alternate to Solar cell , Can you suggest which type of off the shelf power supply will not make any harm to it?






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      • #4
        Originally posted by bobby78 View Post
        My load is around 5 amp and I have 12v 7ah battery
        That ought to tell you something is wrong. Your 7 AH battery can only supply up to 0.7 Amps and you are forcing it to supply 5 amps. That is only going to work for a couple of minutes.

        If you have a 5 amp load running 24 hours per day, you need a 120 AH battery.

        MSEE, PE

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        • #5
          Originally posted by bobby78 View Post


          Many thanks for the reply

          Actually I was trying to make an easy DIY 12V DC ups system and solar charge controller has everything inside except I need some alternate to Solar cell , Can you suggest which type of off the shelf power supply will not make any harm to it?





          Unfortunately the charger in a UPS system is designed for a specific battery type, Ah rating and charging characteristics. Most cheap battery chargers do not have that type of control system and may overcharge or cook a battery because it is stupid.

          I am sure you can build a DIY UPS from parts but if it is important to provide power to something, then I would just invest in a small UPS system since they are relatively cheap.
          Last edited by SunEagle; 04-17-2017, 11:22 AM. Reason: spelling

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