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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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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46 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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63 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
130 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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44 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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67 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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2answers
69 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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4answers
3k views

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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1answer
121 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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67 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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49 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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1answer
156 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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1answer
41 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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3answers
201 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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116 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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18 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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74 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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48 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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1answer
233 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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126 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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43 views

Are default NUT settings fine? (about UPS configuration)

On Debian Linux jessie: After buying an UPS and installation of nut-server and nut-client at my PC and configuring the ports and the protocol, do I need to adjust time and/or percentage parameters, ...
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99 views

My 650va UPS is overloaded

I bought a secure 650va UPS but it is not working good. I tested it by charging it to 6 hours and plug in my PC without monitor just the cpu itself but when i tested it to cut the power off by ...
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119 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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271 views

APC Smart Ups Series differences [closed]

I'm trying to understand differences between between APC Smart UPS Series and APC Smart UPS C series. The only thing I noticed is C series have no expasion slot. Are there some other practical ...
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119 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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72 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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51 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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187 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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77 views

Turn off computer automatically when there's no electricity

I'm wondering that I could not find anything useful on Google. I'm using a cheap UPS which actually prevents my computer to be turned off immediately if there are some electricity issues (they are ...
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210 views

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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315 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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31 views

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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169 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, ...
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Choosing the right UPS

I'm trying to determine the size of the UPS I should buy. Ideally, I would like something to keep my system on for an hour in case of a power cut but I don't have the budget for that. Basically I want ...
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Computer running Windows 7 with a Ouragan Neo900 UPS

We have a number of power issues here on Mauritius and I wondered if there is any software that, when the UPS kicks in during a power loss, can then safely shut down my computer as although I ...
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545 views

UPS - practical maintenance advices to help end-user keeping batteries (classic lead acid models) in good shape

I have read that most (maybe all?) UPS devices for personal computing have lead-acid batteries inside. As long as its chemistry, compared to lithium-ion, is very different, I would like to know ...
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Detecting when a server is running on UPS battery

I have a home server (HP Proliant ML310 G4) that I bought from my employer a month or so ago. The server runs Debian Linux and I use it for just about everything. I can get away with doing this ...
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Using Perl to communicate with Nut

I'm trying to communicate with my UPS that's managed using NUT. I want to read values from it like line voltage, battery charge, etc. I don't want to send it commands to shut it down. At first I was ...
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2answers
666 views

UPS will work on power but not battery

I have an old APC Back-UPS 200 I'm hoping to use for my PC. Connected to power it works fine. When unplugged it emits a "i'm on battery power" constantant tone. The 2 plugs on the back are not ...
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292 views

Reboot after power failure not working

My bios (american megatrends) has an option to reboot after power failure which I have set only it doesn't work. I have a UPS which shuts it down correctly and then disconnects the power. When power ...
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20 views

What should I look for in a UPS to protect my system from outages and surges? [duplicate]

Lately my computer has been subject to numerous power outages due to unstable power in the area. It has started to cause damage to my GPU and has had other impacts on file integrity (the drivers for ...
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7answers
6k views

How to determine what size backup power equipment is needed?

I want to have an optimum continuous supply for my small office for 6hours, which includes, a laptop (AsusG73SW-> 8Cells : 5200 mAh 74 Whrs; Output : 19 V DC, 6.3 A, 150 W; Input: 100-240 V AC, 50/60 ...
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700 views

APC Back-UPS overload

I contacted APC to ask this question, but it has been 5 days with no response. My question is simple: I have an APC Back-UPS ES 750 (450 watts), but let's say I want to plug something that draws more ...
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104 views

In vs Out ethernet jack on UPS

On my Cyber Power 825 AVR UPS it has two ethernet connections: one labeled in and the other labeled out. What's the difference?
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101 views

Making Advice PRV-850 quiet

I've recently bought the Advice PRV-850 UPS. It works as expected, but when there's a power drop, it constantly beeps and I don't know how to make it quiet. I had a different model of the Advice UPS ...
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237 views

Is daisy chaining UPSs safe? Does it add any benefit or cause more problems?

Is it safe and is their any benefit to daisy chaining multiple UPSs together?
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265 views

Mustek PowerMust 600 USB - replaced battery, dies in half a minute

I am having problems with my UPS. Recently changed the battery because I wanted to get a longer lifetime before power down. I purchased the following battery CSB GP1272: ...
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170 views

When unplugged, the UPS plug gives out current. Is it bad? [closed]

We have several power issues in our house like : Occasionally loosing bulbs (in two holders, the light bulbs went out two times. If we put a new one, it will go out after several days. One went out ...