Question about Powercom King Pro 3000VA (powkingpro3000va) UPS System

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When i connect 4 batteries in series for a total of 55 Volt, the ups tells me there is a problem with my battery. is the ups overcharging my battery or are the batteries overcharged. i bought them with 13,6 Volt each. i have a 3000VA powercom ups, light grey of colour

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  • cool159 Nov 17, 2009

    The ups uses a step up transformer . It uses 48Volt to get to 220Volt. So the batteries must be coupled in series.When they are fully charged, like in buying them from a dealer, they are together 54 Volt. Now when i install them in my ups, the machine says, " Check batteries, Faulty "

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I think UPS' are supposed to run on 12 volt batteries. You must connect them in parallel and not ie series as you are doing now. Connect all the Positives together and all the negatives together to give 12 volts and four times the amperage of each battery for longer backup. With series connection you may burn the system. Please check the manual that came with the UPS.

Posted on Nov 17, 2009

  • Vinay Tevatia
    Vinay Tevatia Nov 17, 2009

    OK. Are the batteries fine. I mean they may have the required voltage of 13.5 each, but do they have the required ampereage? You can get 54 volts from flash lite batteries, but they can not run anything more than a small bulb. Similarly, if one of the batteries is having 13.5 volts but is it also having the required ampereage to run the UPS. that should be checked with an amp meter on full load. Thus any battery not meeting the requirement should be replaced.

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