CyberPower CP900EPFCLCD

Advantages: Compact, neatly made, euro sockets (3 + 3) on the back wall. Quite quiet in inversion / battery mode, quiet in linear mode. Easy-to-read display from any angle with graphical and numerical information on UPS operating parameters. By default, the display is activated for 1 minute by pressing a button on the front panel, but you can use it on permanently. The same button scrolls through 10 digital parameters, incl. input / output voltage (checked with a tester - everything is accurate), frequency, output power, load in percent, remaining operating time. Another button sets 3 thresholds of sensitivity for switching to battery mode. More precisely, these values ​​can be adjusted using the supplied Windows software. (True, with Linux it is more difficult - when trying to install the appropriate software, from the CyberPower website, Ubuntu 12.10 swears - "This package is of poor quality ...")

Disadvantages: Even with a short-term voltage drop in the network up to 198 V, it goes into inversion mode. It returns to linear mode when the voltage stably reaches 206 V, i.e. at values ​​of 203 ... 205 V remains in control mode. Everything would be fine, but at the same time, the voltage at the output of the device can reach 244 V, which exceeds the domestic standard (220V + -10%). It suggests itself to lower the transition point to 4 ... 5 V, but, alas, such an adjustment is not available for the user.

Comment: In a barrel of honey - a really excellent apparatus - it was not without a fly in the ointment. It is clear that the Chinese aimed mainly at the EU market, where the standard is 230 V. (By the way, in battery mode, the output is the same 230 V). It is not clear that there are no settings, which, by the way, are available from other manufacturers.

Advantages: Pure sine, compact, beautiful, functional display and software, good price / quality ratio.

Disadvantages: So far I even find it difficult to say

Comment: First, Yandex is lying - this model has a pure sine output, this is clearly indicated on the original website and in the instructions. In the reviews it was written that the lack of the model is the "early" (from 190V) switch to batteries at low line voltage. Apparently, this has now been fixed - through the software, you can accurately set the lower (from 170V) and upper (up to 265V) thresholds.I bought this model for gas boiler (<90W) and single board server (<40W). I checked it by connecting the pump to a 120W asynchronous motor - it works from the battery in the same way as from the mains, without extraneous noise (i.e. the sine is really clean), when switching from mains to battery and vice versa, the engine jerks slightly, I don't think it's critical. I worked for 17 minutes from a standard battery with such a load. An additional plus for me - only one 12V battery is used: if necessary, you can connect an external car. There are a lot of people who prove that this cannot be done, but their arguments are absolutely not consistent and dispelled by all those who have tried it in practice. There are only two nuances - a slow charge (this particular model will charge a 55Ah battery in a little over two days, which in my opinion is not a disaster) and either you need to provide additional cooling for continuous operation from the battery, or load the UPS by no more than ~ 50%. Of course, there are UPS models with a standard connection of external batteries, but they did not suit me in one way or another.

For me, this model is one of the best for its money, only this particular model does not have much output power, and if you are going to put something cool under protection, I'm talking about a gaming computer or some powerful systems, I advise you to take such a model , only more powerful, there are such. Otherwise, the rest are entirely pluses, and the reaction time, and the program is convenient and the display is pleasant, which conveys everything that is needed and does it nicely. It doesn't get very hot, it's been working for half a year already. No problem.

Advantages: At half load, the battery life is about seven minutes. There is no heating during charging. Battery start - yes. There is also a screen with the required amount of displayed information. EMI / RFI filtering. Connecting a local network or fax (the latter is now in the load on the UPS).

Disadvantages: Recharge time. 8 hours or so.

Comment: Norm.

Advantages: - pure sine wave at the output. - fast switching to batteries. No more than 4 ms. - voltage during battery operation fluctuates around 10 percent maximum. - battery start (aka cold start) - yes. - special software for monitoring and configuring the UPS.

Disadvantages: Oh, No.

Comment: One for each workplace. Only four pieces. And this is only in our department. We tested it, checked it in all modes - we were satisfied. In the morning I came, turned on, turned on the load and sit and work. Not a single voltage problem bothers me anymore.