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Showing 1-10 of 2,110 reviews(Verified Purchases). See all 2,254 reviews
TOP 500 REVIEWERon April 26, 2011
I bought the 1000VA model in this PFC series about a month ago to replace a fading APC Back-UPS ES 725. So far, performance has been encouraging.

My first impression upon opening the cleverly double-boxed packaging was that the picture size was deceiving. This CyberPower looks large. It's not. It's dwarfed by my standard mid-ATX towers. Eyeballed relative to one, it's about half the width, half the height, and two-thirds the depth. Positively petite for a tower UPS and roughly the size of the APC it replaced were that one upturned. Extras include a short coaxial cable and an RJ-11 phone wire. Build quality seems quite good, with an attractive combination of gloss and matte black plastic. Once booted, the UPS is completely silent with mains power. It buzzes quietly and runs a small, audible internal fan when on battery.

That said, let's drill down the major features of the PFC series:

Line-interactive - In the consumer world, there are three major types of UPS units: standby, line-interactive, and double conversion ("online"). Standby runs wall power straight to the device with minimal filtering unless it detects a major voltage change. Then it switches to battery. Line-interactive is the same, except with a filtering transformer between the wall and the device to handle most voltage variations. In an area with dirty power, line-interactive units won't cycle to battery power as often. With clean power, there's no practical difference between the two. Double-conversion means the battery always powers the device and wall power only charges the battery. The isolation is helpful for sensitive things, but less efficient because the wall power is perpetually converted from AC to DC and back to AC. The heavy-duty inverter this type requires also tends to increase cost and noise.

Some areas will have greater voltage fluctuation than others. If you're in California and surrounded by industrial machinery, line-interactive or double-conversion is where you want to be.

Sine wave - When a UPS with this feature is on battery power, the cycling frequency of the AC it produces will be a smooth sine wave instead of a blocky approximation. (The quality of this approximation scales with price; the inverters in cheaper UPS models tend to produce pretty ghastly waveforms.) Most devices don't care. Some with a direct current path may, as will electric motors and instruments that derive their timing from the power frequency. The majority of computer power supplies will work fine with any UPS, but those with active power factor correction may turn off if they encounter a particularly poor sine approximation. If the system continues to run after the UPS switches to battery, and it probably will if it's older or inexpensive, you're in the clear. Pure sine output is compatible with all computers and skirts the issue entirely.

This UPS has a capacity of 600W and 1000VA. You can ignore the second number if your hardware is recent or expensive. In the grand old days when the real power use of a computer (W) was 40% less than the apparent load to the power grid (VA), it made sense to specify more VA capacity than W. Now, though, with power factor correction (an attempt make the ratio of W:VA closer to 1:1) standard for years, the actual load is likely to be 90% or more of the apparent load. A 200W computer will probably use 200-225VA of capacity. You're therefore likely to reach the watt limit well before the one for VA.

Here's how the PFC models compare in maximum capacity, battery size, and runtime:

CP850: 510W max, 1 x 7 amp-hours = 8 min @ 255W, 2 min @ 510W
CP1000: 600W max, 1 x 9 amp-hours = 9 min @ 300W, 3 min @ 600W
CP1350: 810W max, 2 x 7 amp-hours = 9 min @ 405W, 3 min @ 810W
CP1500: 900W max, 2 x 8.5 amp-hours = 11 min @ 450W, 2 min @ 900W

While the latter two have USB charging ports and more physical size to accommodate an extra battery, all four otherwise share the same feature set.

Runtime doesn't scale linearly with load. A CP1500 feeding 100W may well last 60 minutes. At 900W, it'll last 2 minutes, best case. That's a factor of 30 difference in runtime for only 9 times more load. To ensure your system stays on long enough to shut down properly, the expected draw shouldn't be more than about 70% of the maximum capacity. CyberPower's software can be configured to automatically shut down any single system via USB or serial, though the comments attached to this review note that older versions may write excessively to SSDs.

In my case, I've got a 12-drive file server, tower PC, router, switch, 24" LCD, and 32" LCD plugged in. The front-panel UPS LCD tells me that is an idle load of about 340W and 350VA. Projected runtime on my CP1000 is 6 minutes. A typical single computer and LCD monitor will draw 125W together. Gaming systems and larger screens, perhaps 150W-250W at idle. Most people with one system will find the CP850 adequate if they shut down soon after saving open work. Multiple systems or attempting to ride out a power loss would benefit from the CP1350 or above.

So how does the CP1000 perform? It's hard to say. It feels satisfyingly heavy even without the battery, but as I haven't torn it apart, it could well be filled with peanut brittle. There haven't been any lightning strikes, so the 1,030 joule surge rating (three times APC's typical rating) remains untested. Actually, the only stressor has been my laser printer. It's plugged into the same wall socket and when it heats up, the lights flicker and the UPS trips.

The switchover time from mains to battery isn't quite as fast with this Cyberpower. I know that because my APC caused a slight flicker on my LCD TV. This one gives a severe flicker that all but turns the TV off, though the other screen and the rest of the computer equipment are unaffected. It's also intolerant of overloads. Because a laser printer can easily pull 1200W or more, you're not supposed to plug one into any UPS outlet, battery-backed or not. I did by accident when I was moving cables around. The resulting shutdown and angry beeping was unsurprising. No docked stars for any of this, though I might have if the TV had actually turned off.

One niggle of note: my UPS took an usually long time to get past the initial startup. I spent about ten minutes pressing and holding buttons in accordance with the manual before it finally turned on. Since then, no similar issues, and I was alerted in a comment that it's possible to force the display to stay on by pressing and holding the display button until you hear a single beep.

All considered, I'd give this CyberPower a preliminary five stars. The APC lasted four years on the battery and five until the USB monitoring port went out, so that's the benchmark I hope it'll beat.

UPDATE 5/12:

I recently had an extended power outage. The estimated runtime was nine minutes at the start, but the UPS shut off in four or less even with a smaller load than above. This is significantly below Cyberpower's projections for this unit, so I'm docking a star. I would be tempted to choose a CP1500 if I were buying again. They come on sale for $150 or so every few months.

UPDATE 9/12:

I've had a new issue where the UPS stops powering all outlets for a few seconds at a time. No beeping or error messages ensue, but naturally, all devices turn off. The warranty for this unit is 3 years. Support has advised me to RMA. I'll update when that process is complete. Shipping to CyberPower was $18 through UPS. It's a very heavy package because they advise leaving the battery in.

UPDATE 10/12:

CyberPower has shipped me what appears to be a new unit. Turnaround time was a little over a week. No UPS signature was required. I didn't have any trouble turning this one on.

UPDATE 11/13:

No new issues to report. The replacement runs exactly as the original once did.

If you intend to downvote, please leave a comment. I do try to be accurate, I'd much prefer to know the issue.
106106 comments| 2,358 people found this helpful. Was this review helpful to you?YesNoReport abuse
on January 4, 2011
Purchased this to replace an older UPS that wasn't compatible with my new Computer Workstation. I'm a Software Engineer and DataCenter SysAdmin by trade.

This unit works great at a fraction of the price of a "True SineWave" UPS I'd use in Server Rooms, and is suitable for workstations equipped with newer / high-end PFC (Power Factor Correction) Power Supplies.

I love the Onboard LCD, which shows a battery meter and a load meter; along with stats like Output Watts -- much like a kill-a-watt would show. You can decide whether to turn off the LCD on idle, or have it always on. I also love the fact that the Alarm can be silenced -- which is a huge blessing if you already know your power lines aren't stable, or if you have a need to intentionally run equipment on battery power for extended periods.

There's a USB and Serial port for monitoring, which (combined with software) can have your Workstation or Server gracefully shut down before all the power is drained. Though, with the LCD-based stats, you can still get all the info you need without a PC hooked up.

The USB Charging Ports in front have enough juice (Amps) for an iPad to charge.

The replacement battery cells are pretty common (go to a shop specializing in UPS Batteries), but "some assembly" is required to connect them to a "Harness/Wedge" between the cells. This is a common design for dual-cell UPSes, so your UPS battery shop may even have pre-assembled units ready for sale.

In sum: I got one for my workstation, and plan to get another for my entertainment room. At this price and the feature-set offered, this is a great buy. Well done, CyberPower.
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The manufacturer commented on the review below
on April 27, 2012
My CyberPower CP1350PFCLCD PFC Compatible 1350VA 810W Pure Sine Wave Tower UPS arrived today in perfect condition and I immediately put it to the test with my oscilloscope monitoring the output under load (my Dell XPS 9000 computer and LCD monitor). I was thrilled to see a nice smooth sine wave output when running on battery power which was not the case with a Tripp Lite model G1010USB that claimed to have a "PWM sine wave" output but instead was a stepped square wave and my computer refused to run with that UPS.

If you have a modern computer and it won't work with the cheaper UPS backup supplies when the power fails it is most likely because your computer has a PFC type power supply which WILL NOT WORK on any type of waveform other than a pure sine wave!

Some people complain that they wish the battery capacity was higher so they can run on battery power for tens of minutes if not an hour but the purpose of ANY UPS in this catagory is to allow the user to safely close their open files and shut down the computer in a matter of a few minutes, not power it for tens of minutes or longer. If you need extended time emergency backup power then you'll need either a backup generator or a bank of batteries running an inverter to supply power to your load.

I have posted a photo of the sine wave output from my CyberPower CP1350PFCLCD PFC Compatible 1350VA 810W UPS when it's running on battery power only and supplying about 175W to 200W of power to my computer and monitor. The waveform was smooth and actually had less distortion than what is coming out of my wall outlet!

Unlike some reviews from a year ago, there was no smell coming from the unit when I unpacked it and no smell when running so if that was a problem in the past they must have fixed it.

The only thing I wish were different is the lack of ability to keep the display backlight on (it goes off after several seconds when the front panel button is pushed - probably to save energy).

I highly recomend this product - especially if you are looking for a UPS that produces a true sine wave output for your computer's PFC power supply requirement.

May 21, 2012 - This is a follow up to my original posting. The UPS is still running great and I got a response from the manufacturer about how to keep the display light on constantly. "You can configure the LCD to stay ON at all times by pressing the DISPLAY button for 2 seconds until you hear a short beep. This will configure the display to stay on at all times."

CyberPower CP1350PFCLCD PFC Compatible 1350VA 810W Pure Sine Wave Tower UPS
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on March 21, 2011
It's sine wave output means it can be used with the latest computers and entertainment electronics. It cost a bit more than a non-sine wave output unit, but it is well worth it.

However THIS UPS being a sine wave output unit, did not cause any of my new higher power, advanced electronics to reboot when I pulled the power plug from the wall. It can handle the most delicate electronics.

I bought a high power gaming PC and put it on a non-sinewave UPS from another company. Every time I pulled the plug from the wall, the computer rebooted! I then put the other UPS on my plasma TV setup, and when I pulled the power from the wall, the TV and the satellite receiver both rebooted! I thought I UPS was supposed to keep electronics going when the power fails.

The problem I found is that newer computers and high end consumer electronics use automatic PFC(power factor correction) power supplies which makes the power supply more efficient (uses less current) but a downside, is the usual square wave UPS upon loss of AC power will cause the power supply to reboot, causing the attached electronics to reboot. So much for a UPS letting those electonic items ride through a power failure or brown out. Just search the web for UPS Active Power Factor Correction for information on this.

However THIS UPS being a sine wave output unit, did not cause any of my new higher power, advanced electronics to reboot when I pulled the AC plug from the wall!

The unit is easy to use, and quiet. When not supplying battery power, there is NO fan. When supplying battery power or charging the battery, the fan is on, but it is very quiet. Another thing I like is that the output display shows both watts AND VAs of the load. Other UPSs I looked at did not show output VAs.
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on August 17, 2011
Although I agree with most of the positive comments of other reviewers, there are also some serious drawbacks to this unit that you should be aware of if you're thinking of buying one.

The first unit I received made a loud rattling noise whenever the fan came on. After discussing this with the very helpful and patient CyberPower tech support guy (and even holding the phone near the unit so he could hear it), he concluded that the unit was defective. I swapped it for a new unit with Amazon (who were also very helpful), but I learned a number of things in the process.

When the fan was rattling, simply pressing gently on the side of the case in various spots changed the noise dramatically, in one case getting rid of it entirely for a while. The case flexed like a piece of paper. That's how I discovered that the plastic "case" is really just a thin skin around the internal components.

At the suggestion of the tech support guy, I tried opening up the battery case and partially sliding the battery out and back in, reseating the cables. It didn't help, but more than that, it turned out to be quite difficult -- the internal components are really jammed in. And I didn't even slide the battery out very far; I wouldn't look forward to actually replacing the battery. After forcing the battery and cables back in place, it was difficult to get the little door back in place properly. And I'm a strong guy with good manual dexterity (I fix and build lots of stuff).

My overall impression is that this unit is assembled like a really cheap toy. I don't know whether the defect was caused by lack of quality control in the factory, or damage while shipping, but I can see how this product could be easily damaged. (I suspect the company knows this too, since they seem to keep experimenting with different arrangements of foam padding each time they ship the product, both to me and to other customers who've reported mechanical damage in earlier reviews.)

The foregoing criticism has nothing to do with the electrical/electronic properties of the unit, of course, but it can still be a PITA. My earlier experience with UPS systems (I've owned a few) was that they had either sturdy metal cases, or at least heavy plastic.

Moving on... as luck would have it, I experienced a real blackout, lasting just a few hours, on the third day of testing the original (defective) unit. It performed properly (except for the rattle), preventing my system (tower computer, multiple hard drives, two monitors, external speakers, etc.) from crashing, and predicted almost a half hour of run time, which I thought was reasonable. However, I decided to shut down all the computer equipment (including the UPS) quickly, which I did. After shutting down everything but the UPS itself, the UPS display indicated a much longer run time than it had when the computer system was running off the UPS battery -- but not as much longer as I expected. It went from about 20 minutes (usually 25, but the battery was slightly depleted) to a prediction of about 90 minutes; under the circumstances I expected a prediction of several hours.

Since the unit had zero load (which it reported accurately), and since it couldn't recharge the battery (no wall current), I figured that it didn't have much to do at all and should run a long, long time. But the fan kept running. The tech guy later told me that in a blackout the unit has to consume battery power just to power its internal functions. Fair enough, but for such a minimal load (just monitoring the situation) it seemed to me that the fan should have gone off, and the fan was what was probably consuming most of the power.

Finally, a serious issue that will only be of interest to some Mac users. CyberPower doesn't supply separate software for the Mac (as they do for Windows), but they claim the unit is compatible with the Mac's built-in UPS software (which appears in the Energy Saver panel of the System Preferences if the Mac detects a UPS connected by USB). The CyberPower website claims the unit's firmware (build-in software) is Mac-compatible, and even shows screenshots of it running on a Mac. What they don't mention is that the screenshots are for a version of the Mac OS (Leopard/10.5) that was discontinued about two years ago, and that they apparently had never tested this specific UPS model with the current (at that time) version of the OS, Snow Leopard (10.6). The tech guy admitted that the screenshots are outdated, but more than a month later, I see they still haven't changed them.

Their driver may work with some of their models in Snow Leopard (I wouldn't know), but *this* model is NOT software-compatible with Snow Leopard. The Mac handshakes with the unit when you hook it up with USB, but the communication between the two after that is generally non-existent no matter what happens, or else crazily erratic. During the real blackout I experienced, plus circuit-breaker tests I did later with the (non-defective) replacement unit, it was clear that the Mac had no idea if there was an outage, thinks the battery charge is always "120 percent" (!) no matter what, but conversely might occasionally decide there's an electrical problem (when there isn't) and begin the countdown to shutdown for no reason. Or, conversely, after a real blackout and despite power having been restored, it might continue the countdown to shutdown. Usually the Mac simply does nothing in response to the unit. In fact, the software is worse than useless, and any Snow Leopard user should not connect the USB cable. (I haven't tested it in Lion.)

For my workflow, the software doesn't really matter to me -- when the Mac is unattended I put it to sleep anyway, and an electrical outage won't wake the computer to shut it down (the event is not a "network event" according to the tech guy). So I just unhooked the USB and treat the UPS as a "dumb" unit. But the software might matter to you, plus there's the issue of the credibility of a company that claims Mac compatibility for two years after that was no longer true, and shows obsolete screenshots without identifying them properly.

Other than those criticisms, I like the unit well enough, thought the tech support was excellent, and consider it a good value for the money.
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The manufacturer commented on the review below
on December 7, 2016
Be careful when you order this item because Amazon does not accept returns. Amazon did give me a refund but there is no way that the smell coming from these units is "normal" (Amazon sent me another one to see if it would resolve the issue, but both had it).

Doing a quick search, a few recent reviews and questions have been posted recently regarding this problem. I'm confident it's just a bad batch of units because nobody would be able to use this product otherwise. If you try to use it inside your home or in an office, the fumes will fill the whole room. I had to remove the unit from my home because my throat was becoming sore and scratchy.

I have no doubt the unit works flawlessly, but this smell is just unacceptable and should never get past QC. I could smell it through it's original packaging and it has not dissipated whatsoever (my whole garage smells terrible now).

Edit: I've had the unit in my garage for 3 weeks now with an air filter and fan pointed at it, it still smells really bad. I brought it inside yesterday and this morning my office smelled awful again.
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The manufacturer commented on the review below
on March 11, 2013
This unit worked fine for approximately six months. It was always plugged in with much less than the maximum load, and handled self-tests plus a few short power outages with no problem. Then one day, the power flickered, and the unit cut off completely and made a loud constant beep. Of course, it cut power to my PC/monitor until I power-cycled the IPS (Interruptable Power Supply -- that's a joke, son). I turned everything back on and went to the CyberPower application to perform a self-test. Pressing the self-test button caused the device to turn off and immediately cut power to my PC/monitor. Well, that's not good for my computer.

So, faced with a $200 paperweight, I decided to use the warranty service. No problem, just mail it to us! Wonderful, the thing weighs a ton, so it cost a small fortune to ship (okay, ~$30). That should have been my first clue; a good company will pay for you to mail their broken device to them as a courtesy for the hassle. I extricated it from my entertainment center and mailed it off.

Approximately two months later, they got around to sending the unit back. I would say fixing it and sending it back, but it came back in the same condition -- they didn't actually fix it. I turned it on, plugged everything in, verified the load was acceptable (~100W), and tried a self-test. Immediate PC/monitor shutdown. It behaves the exact same way as it did when I sent it to them. I think all they did was put a sticker on it. Thanks CyberPower, but I don't feel like paying another $30+ to mail it to you again.

Just sharing my story to save you all the same hassle.

Update 10/21/2014 -- revising my score up to 3 stars. After venting on here, Cyberpower did cross-ship a functioning replacement that is still running strong. I hope the regular warranty replacement program has improved in the time since my experience! Thanks to Cyberpower for making things right.
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on August 10, 2015
Output waveform appears to be clipped triangle, not a true sine. Close to a true sine and good enough for most consumer use -- but if you need absolutely pure sine for some reason, be aware.

Still, the Cyberpower output is WAY better than most in this price class which do "modified sine" (basically, stepped square wave).

I really don't think you can do better in this price range.
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on September 13, 2011
Review: CyberPower CP1500PFCLCD Pure Sine Wave Or Not?- see for yourself if it's a "Pure Sine Wave" (as advertised) or not.
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on September 21, 2016
I owned this UPS for about 5 years before it died.

-great value for money, in terms of battery capacity, feature set, power factor correction, and total efficiency.
-worked great for me for 4 solid years.
-convenient USB ports for charging portable devices without occupying outlets.

-Failed suddenly, unexpectedly, and not due to a battery fault. Unit was under idle load only at the time.
-Failure core F03 apparently means "warranty replacement only, do not attempt repair"
-CyberPower support did not provide any additional information, resources, parts, or labor. They would not repair the unit even if I paid for it.
-weird brownish-red goo near capacitors suggests that at least one capacitor has failed. Generally, replacing those caps is quick and cheap, and results in a fully operational unit.
-I don't like the idea of throwing away a current model product. This unit is likely very fixable. Even if they were to replace just the entire mainboard, the most expensive components (Transformer and Batteries) are fine. Total cost of repair might be $100 but that's less than a replacement unit.

I contacted CyberPower about it, and they said it wasn't under warranty anymore, so I should discard it. It's an expensive piece of equipment, which likely has $2 worth of parts to replace. It's extremely uncool to throw away a unit full of heavy metals and functional components over a dead cap.

I'd like to fix it, whether or not they want to help me. But I'm disappointed that they didn't offer and refused my first request for assistance.
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