Question about APC Smart-UPS RT 8000VA (0731304239635) UPS System

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APC 800va inverter is not charging

My apc 800va inverter is not charging i have changed the battery also it is working on mains and in inverter mode after 15 min it is shutting down because of battery is not charging

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If you need pricing on a new or replacement unit I can help. You may also want to look into APC's Trade-Ups program where they give you a discount on new equipment as long as you provide a serial number for your existing:

If you need UPS, Surge, or Power Related help contact:
Inside Service Sales
Daniel Salazar 800.260.2259
Power & Systems Innovations, Inc.

Power & Systems Innovations, Inc. is an Elite Certified Service
Sales Partner for APC/MGE brands manufactured by Schneider Electric

Visit us at

Posted on Apr 22, 2014


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Posted on Jan 02, 2017

  • 91 Answers

SOURCE: charging apc 800va through home generators

The reason of this is the UPS cannot adopt on the frequency that is being generated by your home generator. you should use APC smart ups series coz smart-up series can work on a wider input frequency range.

Posted on Aug 14, 2009

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1 Answer

Apc inverter charging setting

what do you mean? you can not set the charging voltage of the battery, you may change the output voltage by using the software that comes along in the UPS packing box

May 26, 2014 | APC Back-UPS RS 800VA UPS System

2 Answers

Apc hi800sq

follow this steps and fix it. God bless you
Plug the battery backup into a working electrical outlet. If the battery backup turns on when the power button is pressed, then the problem may be that the previous electrical outlet is faulty. Proceed to step three. If the battery backup doesn't turn on, proceed to step two.
  • 2 Reset the circuit breaker on the battery backup. APC battery backups have a labeled circuit breaker button located on the unit near the phone line, fax line, USB, network and coaxial cable inputs. Press the button to reset the circuit breaker. Power on the battery backup by pressing the power button. If the battery backup powers on, proceed to step three. If the battery backup doesn't turn on, proceed to step six.

  • Read more:
  • 3 Determine if the battery backup is charged and providing battery power. With the battery backup on and plugged into a working electrical outlet, plug a computer monitor into one of the battery backup outlets labeled "battery backup plus surge protection" on the battery backup. (APC power supplies have some outlets that provide only surge protection while the other outlets provide surge protection plus battery backup.) Turn the monitor on. Unplug the battery backup power cord from the wall outlet. If the monitor remains on, the battery is holding a charge, supplying electrical power and the battery backup is working properly. If the monitor goes off, proceed to step four.
  • 4 Charge the battery. Plug the battery backup into an electrical outlet and allow the battery to charge for 16 hours. This will fully charge the battery.
  • 5 Test battery charge. Once the battery is fully charged, repeat step three. If the monitor stays on when power is interrupted to the battery backup, the issue is solved and the problem resulted from an incompletely charged battery. If the monitor turns off when power is interrupted, the battery within the battery backup is faulty and needs to be replaced.
  • 6 Replace the battery backup unit. The unit itself is faulty. If the battery backup is under warranty, contact APC to request a replacement.
  • Nov 28, 2013 | Computers & Internet

    1 Answer

    Problem with a APC Back-UPS BR800I with AVR The

    Hi Petkov,

    It seems that Schneider / APC has a remedy for this on their forum:

    Reply or call if you need more assistance with this -- 407.380.9200

    Oct 08, 2013 | Computers & Internet

    2 Answers

    APC Back-UPS ES500. Battery is new replacement UB1280, and battery has charge and runs fine if unit not plugged in. However, if unit is plugged in to power back-up side outlets in unit don't work.

    there are 2 parts of a UPS .
    the charge side
    and (battery is obvious)
    the inverter side.
    if the charger fails, all is lost. (are the batteries in backwards?)
    if the charger works (volt meter tells you that)
    then the inverter is bad. (this unit is not full time UPS , but part time, this means it switches over to inverter at power fail.
    (on full time sys. inverter runs full time, like the name states)
    the unit, you mean the load right.?
    the UPS side plugged into a load. and the load is now dead.

    the Backup plugs should work if the mains are hot.
    if you kill mains, the inverter will fire off, (hear the squeal?)
    and give you 500 watts for some minutes, sucking the batteries dry. (see load run time curves)
    I used to do service on HUGE UPS systems, some with 100s of batteries. 3 to 5kw too.
    on ours there is a port on the rear , we connect and can
    check everything "BEST brand" even charge voltage.
    did you look on APC site for special software and connections?

    the manual does cover trouble shooting, ever read that?
    RTM? start there, its online, for sure.

    Oct 03, 2013 | APC Back-UPSĀ® CS 500 UPS System

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    Intex 800va ups dead ,plz provide circuit


    Oct 10, 2012 | Computers & Internet

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    I just replace the battery in my APC RS 900 unit because the red indicating light was telling me to do so. I installed the new battery and the red indicating light is still telling me to replace the...

    Sorry to read about your problem, I hope this helps you out.

    let it charge 24 hours, and see if it works

    I tried to help you. Please help me and Rate/Vote on my response, thanks and good luck

    Dec 22, 2010 | APC Back-UPS RS 800VA UPS System

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    Our apc ups showing overlaod when power is switched on

    I am assuming that nothing is plugged in when powering up. This usually means that there is a short or damage to the unit. This forum discusses the issue:

    Dec 31, 2009 | APC Back-UPS RS 800VA UPS System

    1 Answer

    Charging apc 800va through home generators

    The reason of this is the UPS cannot adopt on the frequency that is being generated by your home generator. you should use APC smart ups series coz smart-up series can work on a wider input frequency range.

    Jul 27, 2009 | APC Smart-UPS RT 8000VA (0731304239635)...

    1 Answer

    UPS keeps beeping and resetting. I've swapped battery and getting same results ()

    You have a brand new set of batteries with a bad UPS. Sorry to tell you that. You might have waited too long to replace your battery. What I mean, if you battery can not fully charge up, the inverter will try and keep charging it until it burns out. Then you buy a battery and you are now stuck with it.

    You need a new UPS, may I suggest you get a bigger one....I have a 800VA with your name in it for only $80.00 plus shipping.

    That is cheaper then what you are going to find. Keep it in mind also that APC is no a realy quality product either. Great marketing but poor support. Trust me that BE 500 is disposable.

    Jun 25, 2009 | APC 500VA BE500U Back-UPS ES...

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    Less back up time

    I found the following on APC's web-site for the APC Back-UPS, this will hopefully fix the problem:
    You can also perform a manual runtime calibration. This could be done if you have changed your equipment load or battery. Stop the PowerChute software from running; disconnect the serial cable between the computer and UPS. Next unplug the UPS from the wall and let it run on battery until it reaches low battery. Once it reaches low battery plug it back into the wall outlet and let it recharge. Recharge time can take up to 4 hours.

    from link:**&p_li=&p_topview=1

    Mar 31, 2009 | APC Back-UPS RS 800VA UPS System

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