Customer Reviews

Cyberpower CP550SL UPS - 550VA/330W 8-Outlet RJ11 Compact Design EMI/RFI USB

5 star:		(6)
4 star:		(2)
3 star:		(1)
2 star:		(0)
1 star:		(2)

 

 

I have one of these and it did its job during a power outage yesterday. This UPS is cheap and works perfectly fine but beware the pitfalls of stepped square wave UPS's. During yesterday's particular outage, this unit kicked on to protect a computer system. The system shut down fine but the power adapter for the USB hard drive that was plugged into the UPS overheated trying to operate on the stepped square wave power and failed destroying the USB enclosure and drive in the process.

The important thing here is that this failure was NOT the fault of the UPS. It did exactly what it was supposed to do; however if you are protecting valuable data or critical infrastructure with one of these just remember you can step up to the category of true sine wave UPS's for only about $100. The price difference is well worth it!

After about 8 months my unit failed, I have been ignored twice via e-mails to Cyberpower, and today was just hung-up on twice after tying to reach tech support and warranty departments. The only person I spoke to was during the call for warranty work, and that was an operator to switch me to the department after being on hold for 1-2 minutes, click- goodbye.
The second call to tech support via the phone keypad was disconnected after a message to contact via e-mail.
Beware they do not want to talk to you once you have purchased the item. go with any other UPS provider!

Easy to install UPS unit from Cyberpower, provides surge suppressor function and 20 minutes of electricity for a loaded Pentium 4 PC during power outage, enough to finish up some work and shut the PC down safely.
For unattended PCs the USB link takes care of automated shutdown. SW is easy to install and provides status information in addition to shutdown procedure.

I've used CyberPower UPS's previously and was satisfied. In fact, I had this same model for three years before it wore out.
I immediately ordered a replacement and was sadly disappointed when the one delivered was defective. It issued an overload alarm even when nothing was plugged into it.
I believe that my previous models were manufactured in the USA but the new model was made in China.

I have a Dell XPS system with 2 1TB internal hard drives, 4GB RAM, 2 22" flat panel monitors, and several USB & a couple of firewire accessories attached. The pc and both monitors are plugged into the battery backup side of the UPS. The Cyberpower software tells me that the equipment that I have plugged into the battery backup side will run for 12 minutes on battery in the event of a power outage (not bad for the big load it's handling). If necessary, the software will power down the computer for you also. I have tested by unplugging the UPS for a minute or two, and all seemed fine.

I'm very satisfied with my purchase.

I use this in my office. I have 2 PCs and 2 CRT monitors attacked to it. It works well for momentary power loses that last a few seconds, and for longer power loses, gives me 2 or 3 minutes to save my work and power down the 2 systems (of course it would last longer if I didn't connect my monitors, but I couldn't see to save my work then).

Note: it does NOT have enough watts to handle a sole PlayStation 3, and if you had anything else plugged in when the PS3 was on, they will all go down together. PS3 is speced at 380 watts; you will need a bigger UPS to handle this one.

A nearby lightning strike came in on the phone line, and this newly-installed item took the hit and saved our DSL modem. The follow-up support by CyberPower was quick and complete, replacing the damaged unit promptly at no cost. A new modem would have cost $100, so do you think this UPS has paid for itself already? Right.

I purchased this UPS for my desktop computer. I have no available USB ports on my computer, so I was really concerned about where I would plug in a UPS to enable automatic shutdown. I started looking around online and found that Cyberpower included serial connectors on their UPS models. This was perfect because my computer had the available serial port. It's actually nice to be able to put that port to use, because otherwise I would never use that port. I don't know why other brands don't include a serial connector as well. The only small negative, is that Cyberpower does not include a serial cable! So I had to purchase one of those separately. Everything was easy to use and install. I've had no problems with it. I feel protected from surges and power failures. I would recommend the product!

I have had a Cyberpower UPS before and liked it. I liked the price and the dependability from before. So far this product is holding up well. I am using it for a desktop PC.

I use this in my office. I have 2 PCs and 2 CRT monitors attacked to it. It works well for momentary power loses that last a few seconds, and for longer power loses, gives me 2 or 3 minutes to save my work and power down the 2 systems (of course it would last longer if I didn't connect my monitors, but I couldn't see to save my work then).

Note: it does NOT have enough watts to handle a sole PlayStation 3, and if you had anything else plugged in when the PS3 was on, they will all go down together. PS3 is speced at 380 watts; you will need a bigger UPS to handle this one.