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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994 views

Shutdown VMware guest applications when UPS kicks in

My situation is that I am running VMware workstation to run a LAMP server for some lightweight data collection. My host OS is Windows XP. I have a APC UPS that is set to shut down the PC via ...
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2answers
33 views

Implications of AC power failure on suspended Linux box

My Linux box will be automatically shut down by the attached UPS if it is running and the AC power fails. If I have the Linux box suspended and the AC power fails, I assume the UPS can not shut it ...
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9 views

Can a Liebert.itON BX handle a DeepCool DE-500 PSU?

I am planning to buy a DeepCool DE-500 PSU and my UPS is a Liebert.itON BX. Will my UPS be able to handle the PSU?
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25 views

What will change with my new Inverter?

Before i had a 750W Inverter (12V input) and i use 2 x 12V (150AH) car batteries connected in Parallel. With this configuration , i can keep my 2 Computers around 2 hours when there's no electricity. ...
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1answer
54 views

Reset & Configure APC 2200 - Model SUA2200RM2U

My company are upgraing their UPS's in their server room and asked if i would like one of the UPS's. I said yes absolutely. I work in IT and have experience with networking. My question is the network ...
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16 views

APC SMX1500RMI2UNC connect battery

I have a brand new APC SMX1500RMI2UNC which I installed last night. All was good and running well last night. When I woke up this morning it is beeping with an error saying connect battery. So I ...
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1answer
31 views

APC UPS reports battery charge 000.0%

I have a Back-UPS CS 500 attached to a Linux PC (openSUSE 13.1 x86_64) that since this morning reports BCHARGE : 000.0 Percent TIMELEFT : 0.0 Minutes The other values seem normal to me: $ ...
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5answers
22k 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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1k views

apcupsd on Linux does not see APC BackUPS Pro 900 on USB [SOLVED]

From what documentation I could find, the UPS is supported on Linux and is reported to be working with apcupsd. I looked for specific problems such as the infamous Microlink protocol, and found none. ...
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19 views

Prevent external hardrive damage from blue screens or power cuts

I've recently been thinking about getting an external hard drive in order to backup all the stuff that I have, as well as having extra room for some more. Naturally security is an important concern ...
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1answer
436 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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1answer
46 views

recommended battery for 750 watt ups

I have a ups with capacity 750 Watt, please advise if i can use 175 Amp battery with 750 watt ups? otherwise please advise suitable battery capacity for 750 watt ups so it can perform good.
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7answers
44k views

If my power supply is 700w, do I need a 700w UPS?

if my power supply is 700w, do I need a 700w UPS? I am running dual 20" dell LCD's, a i7 quad core system with a radion 4870 1gb video card, 2 hard drives.
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1answer
53 views

CPU cores remain offline after hotplug

When my UPS triggers an "on-battery" event, I want all cores to switch off to conserve power. The PC has 8 cores on two chips, UPS batteries need replacement every 3 months because of high current ...
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1answer
85 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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3answers
101 views

How does ethernet, coax, and telephone surge protection work?

So I'm planning on buying a UPS and I see that they have ports for protection of ethernet, coax, and telephone lines. I've read answers on these three questions, but none of them address this question....
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1answer
123 views

How to stop a UPS beeping when it's using its battery normally? (APC Back-UPS BX650LI-MS)

I'm in a country where power outages are a daily occurrence, and 12 hours of power in a day is a good day. I've got a UPS (a APC Back-UPS BX650 model) and it works fine. Its capacity (12V 7Ah = 84 ...
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3answers
69 views

What kind of outlet should I use in my UPS?

I have a Powercom Imperial Series UPS (625 VA) and I want to connect it to a PC and a monitor. Which outlets should I prefer and why? Do you know the difference between battery backup and surge ...
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1answer
59 views

UPS suddenly restarting, what might be the cause?

Background My UPS has a backup of about 10 mins, thus, it's battery life is good. No problems detectable. My CPU, on the other hand, is also fine with no major hardware problems (as it looks so) ...
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4answers
4k views

Any way to restore a UPS battery?

I have an older APC UPC, and the battery appears to be dead. It appears to be a small, lead-acid 12 battery - is it possible to revive the battery? It's certainly not worth it to replace it - a new ...
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3answers
249 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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1answer
39 views

Mixed messages from UPS providers about UPS runtime

We are testing a (single) Comcast phone line, before "possibly" shifting more lines away from ATT. The one whoops in the process however is that we have no Internet phone, if there is no power to the ...
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6answers
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Is UPS necessary to have for a PC?

Can my computer components ( Monitor, Motherboard, RAM, HDD, CPU, SMPS) become damaged due to a sudden power flux. It's only needed to shut down Windows properly. Can I solve both Hardware and ...
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1answer
34 views

Connection between UPS and server

I have bought a new Server and UPS and am trying to find out if I need to buy an additional card (specifically, a network card) for the UPS and/or the server in order to manage the UPS, and allow it ...
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4answers
2k views

Does a cable internet connection remain active during a loss of power in the apartment building?

I live in an apartment building in Czech Republic, Europe. I have a cable internet connection with a static IP connected to an Ubuntu server I set up. Recently out building lost power, though the ...
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1k views

Does Laptop's Battery Condition Power When On AC?

I doubt about this, but still want to hear what others think. UPS condition power but does laptop's battery condition power?
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2answers
6k views

How can I set my Windows 7 desktop with a UPS to automatically turn on after a power outage is over?

I've got a Windows 7 desktop system with an APC UPS to provide backup power during power outages. I've got the UPS connected to the system with a USB cable so that the built-in Windows power utility ...
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1answer
49 views

APC false alarm?

I have an APC Back-UPS 1500RS attached to a Gentoo server that's less than 2 years old. I've already replaced the battery once on this thing and am getting replace battery messages again. I'm not ...
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1answer
138 views

APC Back-UPS ES 500 stopped working

Last night I plugged an electric heater into one of the 3 battery back up outlets on my UPS. After about 10 minutes all 3 stopped working. The other 3 outlets that are surge protection only still work....
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1answer
275 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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1answer
42 views

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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4answers
6k views

computer shutoff suddenly, I have a APC backup UPS SE 350

My computer suddenly shutoff (abruptly), and then the APC (UPS SE 350) started to beep continuously. I pressed the button on it and it stopped, then I pressed it again and it turned on (green light) ...
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Is there a way to tell the laptop battery when to stop charging?

I don't want my laptop's battery to always be at 100% because it lessens battery life, especially when above 25 Celcius, the lowest summer temperature in Israel (currently 30C - 32C). I prefer to keep ...
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2answers
5k views

Time needed for a UPS to switch from line power to battery?

What is the average time for a UPS to switch from line power to battery? I now there are some more expensive "inline" UPS which don't have a switching transient, but I want to see if I can use a less ...
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4answers
251 views

Laptop Malfunctions After UPS Failure? I Have Got What I Deserved

My UPS failed today and laptop ceased working. UPS failed me before 1 time and it was when laptop was on standby but nothing happened to the laptop however. Also there were times when laptop was ...
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1answer
42 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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1answer
166 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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1answer
420 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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1answer
77 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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3answers
269 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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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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101 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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34 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 UPS-...
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4answers
7k views

Why PC reboots when there’s a power failure even with UPS?

I've purchased a Line Interactive UPS 1200VA. It's supposed to give 8~20min backup (as written in the manual). This UPS has transfer time < 10ms. It works fine when the mains is active. But the ...
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6answers
3k views

Computer shutdown unexpectedly. Can it be related to bad current?

I have a new desktop computer (Lenovo M81) that shutdowns unexpectedly. Other times, it is mouse and keyboard that become unresponding. If I put the computer to sleep and awake it, everything returns ...
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1answer
55 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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1answer
365 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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2answers
1k 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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1answer
172 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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51 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 ...