Question about Powercom (BNT-1500AP) UPS System

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Powercom BNT 1500AP quit working after power outage

After a short power outage (20--30 sec.) the UPS was out and would not restart. Additionally, the circuit breaker on a power strip plugged into the UPS output was tripped. I suspect there was a surge. Is there a replaceable surge module in this unit? If so, how do you get at it?

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  • copernicusdr Dec 31, 2008

    You were right, wwright. The battery voltage tested low, and after removing the cells, I saw that the cases of both batteries were ruptured (no serious leakage). The 40 Amp fuses (slow-blow, from the looks of them) on the circuit board were fine. $50 for two new cells with more Amp-hours, some screwdriver work, and the problem was solved. This is the second time I have replaced ruptured SLA batteries in a UPS unit.
    Anybody out there g

  • copernicusdr Dec 31, 2008

    Anybody out there got a hack for using standard automotive batteries with a UPS unit? Much more Amp-hours and probably more reliability at the cost of venting the batteries and keeping them upright.


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From your description it appears one or more batteries are bad..The circuit breaker on the Power Strip..which more then likely is a 15 Amp..tripped due to over current conditions..check the batteries and reset the circuit breaker..That should take care of it

Posted on Dec 31, 2008

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Mar 15, 2010 | Powercom (BNT-1500AP) UPS System

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My ups shuts down after ac power goes off

1. Open the UPS housing using a screwdriver.
2. Check the fuse. If is busted, have it replaced.
3. If the fuse is alright, check the battery terminal
for the stored voltage. It must be at least + or -
10% of the rated voltage of the battery. The rated
voltage is located at the battery. (12 volts). If the
voltage is below, 8 volts or only 30% of the rated
voltage. It must be replaced.
4. If the battery

Sep 25, 2009 | Powercom (BNT-1500AP) UPS System

2 Answers

UPS shuts down when the mains is off.


After 3 years, i would by a new UPS...

The battery will have to be changed if you want to keep the old one.

What i've seen mostly here in south africa. When the battery life has ended they customer opens the ups and takes out the battery and then connects a car battery to the terminals. The then close the ups and let the car battery stand outside the ups.

Hope this info helps...

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