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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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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11 views

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
39 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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1answer
38 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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16 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
496 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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2answers
76 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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42 views

How to set shutdown criteria for network ups tools in Debian Jessie

I have installed the nut-server and nut-client pagages for debian and I do have communication with a dell ups. I can send shutdown and start commands via upsdrvctl and the UPS is fully supported ...
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21 views

How to restart nut-server on Ubuntu after USB communcation has been established?

I got Eaton 3S UPS which is connected to my Ubuntu 13.10 system thru USB. Ubuntu communicates to UPS with nut-server. However, when PC is started, it looks like nut-server daemon is started before ...
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1answer
30 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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49 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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2answers
60 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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87 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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0answers
44 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 ...
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1answer
222 views

apcupsd on Linux does not report on APC BackUPS Pro 900

From what documentation I could find, the UPS should be (is!) supported by Linux and ought to work with apcupsd. I looked for specific problems such as the infamous Microlink protocol, and found none. ...
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62 views

Should The Plug of UPS Always Plugged?

Which is better for lifespan: Switch off the UPS and plug off or Switch off the UPS and leave it plugged in. Consider this two statements and give seperate replies: Which is better for >1 Month ...
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3answers
591 views

Is my UPS battery dead or is my UPS broken?

When the lights went out today I noticed my UPS battery didn't work. I checked the monitor and this is what I see: As you can see it says the battery has 90% but when I pull the plug, it doesn't ...
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1answer
107 views

Should I use uninterruptible power supply for an external HDD?

Should I plug in my external HDD into the UPS outlet instead of a regular outlet in the wall to prevent data loss in case of power disruption? My UPS already has a PC and a monitor on it, but I only ...
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68 views

Line Interactive UPS battery maintenance

I am going to buy a Line Interactive UPS (around 600VA/360W with one 12V/7AH Lead Acid battery - probably PowerWalker VI 650 LCD, or Cyberpower Value 600ELCD, or any other...) for my PC needs, and ...
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3answers
618 views

Protecting my PC and NAS units in the event of a power failure

The UK village where I live has what can best be described as a very flaky power supply -- I can expect a brown-out once a week, and a power cut maybe once a month. In the last-but-one power-cut, one ...
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1answer
974 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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0answers
67 views

How important is it to keep UPS connections either filtered or not?

This question is somewhat difficult to summarize into a good title, so let me explain what I am talking about. I have a setup where an ADSL modem connects to the telephone network. The power supply ...
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0answers
180 views

UPS monitoring in Debian with nut

I am looking to set up nut (version 2.6.4-2.3) to monitor my ups in Debian Wheezy but can't seem to find any relevant guides/tutorials. Even the documentation seems to be irrelevant. For example, ...
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1answer
48 views

Ups not going on battery

I've got a new UPS for my computer and I experienced the first power outtage today. I had previously tested the battery once fully charged by shutting the appropriate breaker down and it went on ...
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1answer
85 views

Can a consumer-level (i.e. cheap) UPS trigger a custom script on power failure on Linux?

I am essentially trying to build is a poor mans server failover solution. The non-profit organization I am part of is planning to host several web applications. In order to save on hosting costs we ...
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1answer
89 views

My UPS gets very loud when turning on the oven

My UPS starts making a rather loud noise (which sounds a bit like a very loud version of a fridge's motor) when I turn on the oven. It's also vibrating quite a bit when that happens. It's the only ...
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202 views

Why is my UPS causing my monitor to make a high pitched humming noise

I recently purchased a UPS for a new server build for my home. Since the server sits next to my desk, I figured I'd plug my Macbook and monitor into the UPS as well. That way if the power goes out, I ...
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75 views

Mac os shutdown based on remote UPS

I have my Mac Mini and my NAS attached to the same UPS. The NAS (FreeNAS) exposes the UPS and I can easily read its status using the upsc command. However, after extensive googling, I did not find a ...
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0answers
16 views

What size UPS do I need? [duplicate]

Trying to figure out what size Uninterrupted Power Supply (UPS) I need to keep my machine on in the event of a power outage (or on long enough to save what I'm doing before shutting down). Needs to ...
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179 views

UPS shuts down when using with modem alone

I'm in a place where power cuts are very common for around 5 hours a day. I have a DSL internet connection and a PC. I recently purchased a new laptop which easily gives me 4 hours of battery backup. ...
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0answers
196 views

PC crashes with Power LED Blinking at 1 Second Interval

I have a "server" that recently has started crashing around once a week. I have yet to find a reason for the crashing but the nonrecoverable nature of the crash is unusual. The machine is standard ...
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1answer
48 views

Server Power Management

I am making a single ssh server, and unfortunately, my area suffers from frequent weather-related power outages. This is going to be a bit of a problem if I want to have a server running unless: a) I ...
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38 views

Voltage regulator

Recently a friend installed a regulator on my Mac Computer. I used it to 'safely' shut down the computer when a sudden thunderstorm occurred. The Mac in question was old by computer standards but up ...
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3answers
122 views

Will a UPS switch power off all connected loads in one action?

I am going on vacation and was going to buy a power supply cord with a disconnect switch to power OFF all my equipment, eliminating phantom load. Can I use the OFF/ON switch on my UPS to perform the ...
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152 views

Protecting Against Inrush Current

In my apartment, the main circuit breaker has a very low amperage limit of 5A (220V), with a maximum power limit of 1300W. Therefore, about 75% of the time I plug in my PC power plug, the inrush ...
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1answer
47 views

In the event of power loss how will the master UPS communicate shutdown to the slave over LAN?

I have got two Ubuntu servers running off a single UPS (APC350). The master server is connected via USB and the slave communicates over Ethernet polling the UPS every 10 seconds or so. I have set up ...
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4answers
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Radiation from a UPS

In our office, there are frequent eletric shortages that harm my desktop computer, so I wanted to install a UPS. However, my office-mates pointed me to papers talking about hazardous radiation from ...
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1answer
194 views

UPS switches to battery power when plugging in devices?

Over the past week or so I've had my UPS switch over to battery power briefly when plugging in new devices (possibly limited to just AC -> DC chargers, but haven't tested anything else). I had ...
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1answer
394 views

Can you use a Mac mini without a UPS?

I am using a Mac mini, 2012 model, without a UPS. My assumption is that Apple has designed a special adapter to rectify high voltage and low voltage. Is that right? If I use my Mac mini without a UPS ...
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1answer
406 views

UPS: Do i require a special extension cord for power in?

I have a couple of Tripplite UPS systems. The power in cables are bright orange and about 2 meters in length. I want to put the system on the other side of the room but for some reason the UPS keep ...
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1answer
119 views

Unknown UPS back-up issues

I have a Powercom UPS IND606A. I am staying in India having voltage range of 230. The detail explanation of problem :* When there is a powercut UPS gives back-up but it restarts the computer. ...
4
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1answer
734 views

Does a cable / adaptor for my needs exist? (photos)

I recently bought a UPS, however, the only outlets take this sort of connector: But, the other end of the cables is like this (right): The thing is, I really need to connect it to a power bar, ...
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2answers
432 views

Computer restarts on power failure with UPS

I am having power cut problems in my country. I am using an uninterrupted power supply with these specs waveform: modified sine wave typical 15-20ms, 30ms max My computer restarts when power goes ...
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2answers
162 views

Do uninterruptible power supply increase the life expentency of hardware?

Do UPS increase the performance or life expectancy of the hardware connected to it? What if the UPS has a built in line conditioner?
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4answers
9k views

Why shouldn't I attach laser printers or scanners to a UPS?

I have an FSP EP1000 UPS. The User's Manual says: CAUTION: NEVER connect a laser printer or scanner to the UPS unit. This may cause the damage of the unit. Why is this restriction?
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2answers
611 views

How to find a UPS for my computer? [duplicate]

Possible Duplicate: If my power supply is 700w, do I need a 700w UPS? I have a desktop that I built with a 750 Watt power supply. I'm looking to get a UPS for it and wondering if I need to ...
0
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1answer
118 views

Concerning repeated power outages and blackouts, what power protection device should be used for PC's and laptops?

We encounter numerous blackouts here where I live. I've heard of UPS's and other devices such as surge suppressors, etc... My question is, aside from the integrated battery (which is said to provide ...
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3answers
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System connected to UPS goes to sleep short time after power is lost

I have a Win7 x64 system connected to the UPS. The UPS is capable of maintaining the system power for about 30 minutes. After I have connected the UPS, I have verified this by disconnecting the power ...
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1answer
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Windows 7 goes into hibernation immediately after the UPS kicks on

I have a UPS that will power my desktop computer for 50 minutes. The idea was that if the power when out I could save/make notes on what I'm working on and then shutdown or hibernate the desktop. But ...
0
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1answer
211 views

Using a laptop without battery [duplicate]

Possible Duplicate: Are notebook batteries generally hot-swappable? My battery is at 50% wear and I was planning to use it on AC without the battery. I was planning to use an on-line UPS so ...