PST5-850MT120

The 350 VA model is not good for a PC. The Power Assist application - which worked flawlessly for me on Windows but not on Linux, will tell you that even if the average usage is below 50%, the moment you start a demanding task (a video rendering/conversion, a Photoshop filter or a heavy game), the consumption will go through the roof. It will hit above 100% of the UPS capacity, and after a few desperate beeps, your computer - and the UPS will be shut down, no questions asked. The solution is NOT to mute the UPS speaker. That will conceal the problem, not solve it. The solution is to get a more powerful model, that will never reach 100% capacity. Then you will not hear a single beep. This device can be good for your router, NAS, maybe TV. You decide which devices you want just to protect from surges, and what you want to continue working even after a power outage. But 359va it is not good for your desktop PC - unless it's a very humble piece of hardware, with a very low wattage CPU. On the photo: on the left side (surge only) are connected non-critical devices, such as the amplifier, or one monitor. On the right side (battery backed up). only one computer and one monitor. Interestingly, on Linux the consumption was much lower for the same tasks. The UPS never shut down. Under windows, the beeping was much more frequent and the shut down was inevitable. I had a few shut downs already, so the UPS will be upgraded to 600 VA. A year later: I've got two 600 VA and had to buy a third one, 850 va after I added a Nvidia GPU to my PC and started playing with local AI. I was able to launch the Power Assist app on Linux. The trick is to edit the 'powerassist' file. It is not an executable but a script that launches a Java application.

The 850VA works well with my my Win-10 desktop PC and gives me about 8 minutes of run-time, starting shut-down of my PC at about 6 minutes. Wanted something to keep my rig running for a short time during short power outages and which shuts down my desktop PC automatically if the power is out more than a few minutes. I Hhave the UPS connected to my Win-10 desktop PC: 800 Watt power supply, 64GB RAM, 8GB GPU Card, two 24 inch monitors , a KVM switch, a 7-port USB hub, illuminated keyboard and mouse, and two Wi-Fi routers (two different ISPs). I followed the instructions and downloaded the software to manage automatically shutting down my PC if the power stays off more than a few minutes. This seems to shut down my PC when the battery power gets down to 15% , but there are no options for setting the action when it hits 50% or another number the user may prefer. Great product at a good price which Will help protect my PC from a hard shut downs due to short power outages. The 500VA gives me about 12 minutes if run-time with my 55inch TV and DVR. For short power outages this eliminates the nearly ten minute reboot of the DVR.

I want to begin by stating my bona fides. Before retiring, I was an IT field service technician. Among other things, I dealt with UPS service and replacement in corporate and retail environments. It would appear that some reviews don’t understand the proper purpose of a UPS for home systems. It is designed to prevent your device from crashing during a power outage so that you may properly shut down the device. It is NOT INTENDED to allow you to continue operating on the device in the absence of house current. That is what a laptop will do (For a limited time.) It is NOT INTENDED to run your refrigerator, ac unit, and computer device simultaneously. All UPS devices have a load level. And will complain loudly if you exceed that capacity. So, does this device perform as indicated? YES. I run a dual display and a PC off of the battery side of the UPS. And I had a power outage not too long ago, and the UPS supported my PC for at least 20 minutes. Allowing me to perform a proper shut down of the PC. The connections on the UPS are as follows. Four battery backup AC plugs, Four surge protection only AC plugs, RJ45 (Internet cable) surge protection (Input and Output), RG58 (Cable TV cable) surge protection (Input and Output), USB communication port, USB charging port, and an LCD Display. IMHO, the RG58 and the USB communication ports are superfluous. Fewer people continue to use older style cable, and while the diagnostic data is helpful in a corporate environment, for the home user, it is unnecessary. The LCD diagnostics are good, and the LCD panel is bright. I have mine mounted against the side of my desk hutch. However, because of the location of the ports, you have to mount it vertically. If you mount it horizontally, the ports will be difficult to access. All in all, I find that this device works properly, has good (And some unnecessary) features and connections, and seems to be of quality design. BTW, my model number is PST5.

Nice little UPS, reasonably priced. Usually in Midtown Manhattan, our power is very reliable but surprisingly in a class A building, a PC was shutting down for now reason. We put the UPS between the computer and the wall outlet and the logs created by the UPS software proved that the outlook was losing power intermittently. The UPS did its job and kept the computer from shutting down.

Just a good backup battery that has been working as expected for almost 6 months so far.

UPS has intermittent issues that simply makes my desktop reboot at any given time (typically once every one or two days, sometimes twice a day) for absolutely no good reason whatsoever. The issue is not directly related to the battery or backup power (ups holds power and supply power if the power cord is disconnected from wall outlet). The issue is most likely related to component failure or low grade/quality component (like capacitors, relays, power mosfets, etc). It may be related to inability to deal with power fluctuations once components heats up due to low grade or bad component(s); or the intermittent abrupt failures simply manifest themselves out of the blue due to low quality/grade or bad components and parts (high propensity to fail in an unexpected time once some unknown thresholds are met; overall, it seems to be related to the automatic switch mechanism). To be avoided at all cost if you value your sanity and want to keep the integrity of your data and workflow.

This a great unit for surge protection for plugged-in devices and your cable inputs too. and cable connections to your TV. A USB charging port is a bonus for longer outages. I chose the 850VA model and it worked perfectly for a recent power outage. The TV never flickered when I heard the first Beep. Then again and again when I realized that it wasn't just a blip (we have many) and it was an outage. It kept a 50" LG TV up with a Motorola Surfer modem and Wi-Fi router up with no problem. I had no idea how long it would stay up, and Duke Energy's MMS said 2+ hours. So after an hour, I powered down the TV (and unplugged it) as I could watch on my laptop also unplugged on battery. 60 minutes later we were back and it never faltered. The beep is annoying and also an unnecessary power draw, so after reading a few posts here that did not show where this elusive button was. I went to the site to find the manual at http://vertiv.com Wah Lah...the button also shows status and usage Hold it down for 2 seconds then release, you should hear two beeps and then blissful quiet. See image

The power flickers A LOT at my in home office... These make it so my computer, printer, and Wifi DON'T GO OUT! For me, these are a game changer! Pricey but SO worth it!