A UPS (uninterruptible power supply) is a device used to provide instant backup power to critical systems for safe shutdown in the case of a power outage.

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Power surge protection levels, spec of protective hardware

For some reason I experienced an extremely brief power cut (half a second or so) and it corrupted my desktop PC's BIOS (ROM?) which had to be restored and reconfigured. This is despite using a surge ...
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27 views

Windows 7 Frequently Hangs Up

Of late I've not been getting as much love as I used to from my beloved Windows 7; inspite of all the adoration I've showered on her over the years. Recently, when I tried to update, she wouldn't and ...
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Booting Dell XPS720 stops during BIOS when powered through UPS

I use a (now rather ancient) DEll XPS720 as a music server running Linux Mint Debian Edition. If the PC is connected directly to the mains power, all is well, though ill-advised in case of power-cuts. ...
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47 views

What are the effects of power dips (brownouts) on computers?

A lot of UPSs advertise they protect against "brownouts". What exactly is the effect on a computer if the voltage goes low but not completely out? Where I'm currently living the lights frequently ...
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68 views

Uninterruptible Power Supply Unit Failure, Or Is It the Battery?

I have an APC brand, SUA750 Model UPS unit that has been in service since late 2008. Recently, it failed completely when there was no power outage. (If any power outage occurred, it was for only a ...
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33 views

how to setup different nut-configs for machines hanging on the same ups

I am trying to set up NUT (Network UPS Tools) on two different computers, which both are supplied by power by a single UPS. In case of line power failure, the one computer connected to the ...
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42 views

PC starts then stops, then starts normally

I have built a new PC very recently and everything seems to be in place. But when I switch it on all fans, including the CPU spins for just one second and stops immediately (it seems like the PC ...
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146 views

How to keep OS X server up after booting without user having to sign in?

I've been having this problem now for quite awhile, and it's really starting to cause some major issues for my setup. At my previous job, this server was UPS-protected, so whenever there was an small ...
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82 views

What does a single audible signal every 30 seconds mean coming from the APC BackUPS BE550G-GR?

I have APC Back UPS BE550G-GR installed at home. This is a home class device, and I bought it since I need only basic protection of my home network devices, and disk storage. Recently device started ...
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44 views

Luminous UPS turns off automatically when system left idle

I have Luminous UPS. When my UPS is on battery mode and system is idle it automatically turns off my computer. I have made sure it’s not due to low battery because when I start the UPS again it works ...
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29 views

UPS doesn't work on off-grid solar power system

My APC 350 UPS worked fine when plugged into standard utility company power in the States. Now it's being powered by an off-grid solar power system in Central America, using 120 volt power from a ...
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64 views

Is it possible to use a UPS or power inverter in place of a dying battery in a laptop?

My battery is dying and I can’t buy the a new battery because its not available in my country (India). My battery model is A41-X550E (ASUS). And it’s inside my laptop like this: So that’s why I ...
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155 views

How do I know how much power is left on my external battery?

Our IT consultant persuaded us to add an external battery pack to our dying UPS, rather than buy a new one. The UPS still counts down from about 4 minutes after the AC power is removed, but continues ...
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5answers
138 views

Is it okay to connect a smaller UPS to a bigger UPS?

At my office we have two UPSs, The Big one has 10x 12v Batteries with 50Ah capacity connected to it, and a smaller 600VA Desktop UPS. The Big one has 8 Desktop Computers connected to it and the ...
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240 views

UPS does not get charged

My 4 year old UPS (uninterrupted power supply) hasn't been getting charged for the last few months. I have searched a lot on Google but haven't found any solution to make it charge again. How do I ...
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20 views

UPS 120v and 230v

I would like to know about a UPS. The APC international model is a 220/230v where in Canada our plugs are 120v. if I could push 230v to the international UPS (installing 15A plug) and switch my ...
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115 views

Need to know about apc ups AVR

Due to high voltage my mac mini broke down. I am looking for cheap option and found this apc ups BX600CI. I read its specification which have AVR. I want to know what doest this mean. Its Input ...
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52 views

Overloaded UPS, might it have damaged connected hardware?

I have an APC Back-UPS ES 400, and during a brief power failure (less than a minute), its buzzer sounded continuously. Looking up the manual, this apparently indicates an overload. It's rated to 240W, ...
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58 views

Is 208V 3phase enough to supply a 220-240V UPS?

Our input voltage is 208V 3-phase but we are not certain if it's capable of powering a 220-240V APC UPS. Can this power supply be used with this input voltage?
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2k views

APC Smart-UPS X 1500VA Warning State: Connect Battery

I have an APC Smart-UPS X 1500V which I just connected to a power source. When I turned the device on it was beeping and giving a flashy red light at the most right icon of the control panel. The ...
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2answers
349 views

Is my UPS responsible for all this damage?

I have an APC Back-UPS RS 550G which I've been using in my home office for about a year. It saw me through a few power outages for which I was quite glad. However, I've lost quite a bit of time to ...
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77 views

Will a 800va UPS output 800va after 3 years of usage?

I have been using an apolo 800va UPS for three years for my desktop. During a power outage will the UPS supply 800va to my PC? When a UPS ages it will decrease the battery backup time but will the ...
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30 views

Can i W PSU on 0660W UPSrun 60 [closed]

Is 600 watt Power supply takes more input voltage than 350 watt power supply?.
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114 views

Why laptop battery so small and UPS bigger and heavier but can only hold lesser powering duration?

My friend asked this earlier today, facts that most: laptop battery are smaller laptop battery are lighter in weight laptop battery can give more time without plugging to power outlet laptop power ...
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90 views

My computer that is plugged into an UPS reboots when the power goes down [duplicate]

I am using a Seasonic SS 400et active PFC F3 power supply, but my computer reboots when the power goes down. The computer's processor is an Intel Core 2 Quad Q6600. I have 6 GB RAM and a GTS 250 512 ...
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When do I need a pure sine wave UPS?

I would like to buy a rack UPS that would support all the IT related electronics in a SOHO room. This include switches, routers, PCs, servers, NAS. During my research I found out that there are ...
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602 views

Accessing APC Smart UPS Network Management Card via hostname

I've got a new APC SmartUPS X 1500 with the build-in network management card AP9631, which I can access it via the ip-address 192.168.0.154. This IP-address has been given by my router's DHCP. When ...
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127 views

PC restarts on power outtage despite having a UPS

Unfortunately where I live I do not have 24/7 electricity. My new PC rig which is considered to be a high-end(gaming) system is connected to a brand new APS/UPS that have these specs: DC-AC ...
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70 views

APC UPS appears to be preventing PC from entering sleep or dim display [closed]

I have recently installed an APC BackUPS 800 for my HP Compaq 8300 All-in-One Desktop PC with Windows 7 Professional OS and now the PC does not want to enter sleep mode anymore or dim the display. ...
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483 views

Can I disable “write-cache buffer flushing” for an Intel 730 SSD on a desktop PC

Can I disable "write-cache buffer flushing" for an Intel 730 SSD on a desktop PC without UPS? This drive has capacitors for power-loss protection - is this enough to flush the buffers when a power ...
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79 views

How can safely I test a UPS that doesn't have a working battery?

I have a UPS that's about 10 years old, and doesn't have it's battery. The thing will not turn on without the battery. Is there any way I can test it to see if it still works? Will connecting the + ...
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477 views

Plugging laser printer into the other wall socket next to a UPS?

Based upon the question: Should you plug a laser printer directly into a wall socket? Given a normal US wall plug with two sockets, it is okay to plug a laser printer directly into one socket (with ...
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474 views

Do I need a UPS with a RAID-configured NAS

In order to keep my home file archive safe, I've bought a Synology NAS and configured it to use a Synology Hybrid RAID configuration. Now almost a year since I started feeling safe about the years of ...
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24 views

Linux Network UPS Tools Setup

Power failures have been wrecking my server, so I recently plugged it into a USB UPS. The problem is that the power failures last longer than the UPS battery can handle so I need the server to ...
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188 views

Is it a case of battery replacement or general system fault in Eaton UPS?

We have an old Eaton UPS 5130 with old battery(ies) of 4-5 yrs which has not been replaced yet. Both Load Not Protected and Downgraded Operator Indicators are on. Load Level Indicators is light 1 out ...
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86 views

APC SmartUPS - “StayOff by UI for: 60s”, what does this mean?

I have a SmartUPS 1500 LCD (circa 2009 with original batteries) connected to my Linux server running APCUPSD. Last week, I had a power cut and the server shut down automatically when the battery ran ...
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364 views

What can I do when my UPS overloads?

I've got a sweex 650VA and the following hardware: i7 3770k 32 GB Ram z77 Extreme 4 MSI nVidia GTX 980 2 HDD 5.25 3 SSD 1 DVD RW All supported by a 700 W power unit. When I use particularly ...
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274 views

APC UPS model:BR550ci-in How to Disable Minimum Load Turn Off

I got an APC UPS (Model No:BR550ci-in). I need to light a bulb(40w, 230volt) from it. The problem I am facing is Minimum Load Turn Off. My UPS auto-detects the load and if it doesn't meet the minimum ...
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287 views

My new UPS loses power almost immediately, even with a light load

I bought a Secure 650VA UPS, but it is not working as expected. I tested it by charging it for 6 hours. I then plugged in my desktop PC (just the PC, itself, not the monitor). I cut the power off by ...
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186 views

What about placing a voltage regulator behind an UPS with modified sine output, to protect an active pfc psu?

I moved to an area/building where there are quite some problems with the wall-power supply. Primaraly I would like to protect my computers, secondary I would like have some affordable UPS for some of ...
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4answers
129 views

Is it necessary to use UPS? [duplicate]

I'm current using Corsair VS 550 (550 watt) power supply unit ,but i don't have any UPS. Is there any chance that my power supply unit and hard disk could be damaged for not using any UPS.can anyone ...
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96 views

UPS with bad battery - okay to keep computing a while?

My APC ES 350 UPC is beeping continuously, with an LED alternating red/green. Nothing happened recently, just normal everyday functioning. According to a quick web search, this beep and blinking ...
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52 views

What is the use of UPS Sizing?

UPS sizing as I have read in the internet is a simple mathematical formula multiplying power (volts) and current (amps) to eventually come up with the load rating VA (volts x amps). The answer i got ...
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285 views

my power supply is 400w, do I need a 400w UPS? [duplicate]

my power supply is 400w, do I need a 400w UPS? my cpu is pentium g620 2.60Ghz,2gb 1333mhz ddr3 ram,160hdd,nvidia gt210 1gb gpu,400w psu samsung 22" LED
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132 views

Have UPS shut down computer automatically in Linux when the power goes out

I'm wondering that I could not find anything useful on Google. I'm using a cheap UPS which actually does keep my computer powered for awhile if there are some electricity issues (they are very common ...
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My computer restarts automatically when there is power outage and the monitor is turned on, using UPS power

I have a Zebronics Power UPS which backs up the system power at the time of power outage. I have no issues with that. But yesterday night I kept a movie to download and slept turning off just my ...
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475 views

APC Smart-UPS 1000VA - command file won't get executed

I've got this old piece - http://goo.gl/5M37Sc, working reliably so far, but it has one big problem: command file when power is down won't run. Everything seems to be configured correctly, but when ...
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What depth of discharge does 0% in a UPS correspond to?

When a UPS like an APC Smart-UPS shows 0% charge remaining, does it mean the deep-cycle batteries are completely discharged or that they're at 20%?
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Would intermittent contact with the service voltage and capacitors in a power supply (inrush current) damage a computer?

If I plugged my laptop AC Adapter power cable into a UPS, causing sparks to blast out (and being unable to insert it due to the UPS being seemingly not designed for this type of plug, for whatever ...
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216 views

Agghhh! UPS Back-Up, Laptop Charger, Sparks

Boy… ok. This is so frustrating! Ok so, I've been getting a whole lot of problems with the electrical grid here lately: spikes, surges, lows, brown-outs, all kinds of problems, it's terrible, ...