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  • APC 900VA 120V Backup-UPS XS900 (BX900)
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APC 900VA 120V Backup-UPS XS900 (BX900)

by APC

Available from these sellers.
  • VA rating - 800VA
  • Watt rating - 540W
  • Battery / Surge outlets - 4
  • Surge only outlets - 3
  • Block safe outlets - 2
1 new from $199.99 5 used from $69.00

Technical Details

  • Model: BX900

Product Details

  • Shipping Weight: 23 pounds
  • Shipping: Currently, item can be shipped only within the U.S.
  • ASIN: B000BH3DB0
  • Item model number: BX900
  • Average Customer Review: 1.8 out of 5 stars  See all reviews (11 customer reviews)
  • Date first available at Amazon.com: October 2, 2001

Product Description

APC BACK-UPS XS 900VA Tower UPS - 900VA/540W - 5.4 Minute Full Load - 4 x NEMA 5-15R - Battery Backup System, 3 x NEMA 5-15R - Surge-protected

Customer Reviews

Unit totally failed after about 3 years.
Linda E. Wightman
Worked great for a few minutes, then everything powered off, the overload light flashes four times in a pattern, and the continuous fire alarm is sounding off again.
Dr. Who
I wanted one that would give a longer battery lifetime if needed.
Patriotic Observer

Most Helpful Customer Reviews

5 of 5 people found the following review helpful By Mike on June 9, 2012
I spent a lot of money for this unit and got about one year of use out of it before it started constantly beeping and overloading. I replaced the batteries with new ones plugged it in and it still overloads with nothing attached to it. I deduced from reading all the other reviews that this is a poor design on cooling the circuit board. The unit runs hot with nothing attached. I guess the cheap fan doesn't last too long and you ruin the warranty by replacing it. If you go to the APC site the unit is discontinued thank goodness they retired it. This will be the last APC product I buy.
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3 of 3 people found the following review helpful By Timothy L. Turner on April 11, 2011
This UPS has an internal 24 volt fan (with no fresh air intake or exhaust!) that makes the whole case buzz. Mine looks nice but when the power goes out it just lights up overload (on what it says is a 216 watt load in the Windows application) and the computer instantly turns off. Too bad I voided the warranty on mine trying to replace the fan with something more quiet. I used to be a big APC fan but this is a poorly designed product.
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1 of 1 people found the following review helpful By George Musser on November 15, 2012
I should have paid attention to the negative reviews. This unit expired shortly after the warranty did. It reported an "Overload" condition; resetting the unit cleared the condition, but it came back a few minutes later. APC tech support attributed it to a circuit-board problem that would require replacement of the entire unit. Elsewhere on the net, users attribute the problem to a faulty fan. Either way, a unit that cost almost $200 is now bricked.
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1 of 1 people found the following review helpful By Tech person123 on February 22, 2012
This product is an unfortunate one. From the very beginning since owning it, it must be plugged in all the time to maintain the battery and take a great deal of power to do so. After owning it for less than two years, beeping has started anytime you turn it on (annoying that you can't turn it off), which suggests that its battery is about to do. For being such an expensive unit and not even being able to find a battery to replace it easily, I am thinking this may be my last apc. If you search apc's website, there isn't even product info or manuals for this manual, so support is lacking.
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3 of 4 people found the following review helpful By D. Coward on January 9, 2007
Everything hooked up thru the UPS is still fine and running (sony Viao, Airport Extreme, Modem, all in 1 printer, ipods and more). We have lost several electronic devices that were not on an APC UPS. Living in Missouri there is lighting and wind messing with the power ALWAYS.
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By Dr. Who on December 31, 2014
Worked well until one day it stopped working and sounded off it's continuous and loud fire alarm sound. The bad battery lights lit up. I just bought new batteries $40 batteries. Worked great for a few minutes, then everything powered off, the overload light flashes four times in a pattern, and the continuous fire alarm is sounding off again. This unit is prone to breaking. The overload light is a common complaint seem around forums. Turns out in my unit the fan stopped running. Thought it was strange why my XS 900 unit was so quiet compare to its regular self.

Here are some links below to take a look at:
https://www.youtube.com/watch?v=eqNZVIlX24Y
http://www.amazon.com/gp/product/B009NQLT0M/ref=ox_sc_act_title_1?ie=UTF8&psc=1&smid=ATVPDKIKX0DER
http://www.quietpc.com/forums/viewtopic.php?f=8&t=1658
http://forums.ncixus.com/forums/topic.php?id=2154055
http://www.techques.com/question/3-79340/APC-UPS-Overload-light-blinking-and-constant-alarm-tone
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