Eaton 5SC750 Pure Sinewave UPS Battery Backup, 750VA / 525W, AVR, LCD Display, Line Interactive

I bought the unit on 2020/November/6th. I use it to run the Optical Network Terminal, or ONT. That device supplies an internet and phone connection. The Eaton 5SC 500 fills the role of a backup power supply that used to be provided by my internet service provider. Now when utility power fails the ONT continues to operate normally. With it's sine wave output the Eaton is compatible with the outboard ONT power supply. Estimated run time with a new battery is over an hour. More than long enough for me to report the power failure. I like the very short transfer time of 4 ms. So the chance of drop out during a transfer is virtually eliminated. The Eaton was so reasonably priced I bought a second one nine days later for my Synology NAS. Today is 2021/August/30th. Both units function perfectly. I like the display screen that shows you the status, operating mode, battery state of charge, and load in watts. After a while the back light for the display goes out and makes the unit less obtrusive. But the display is still on. Just shine a flashlight on it and you can read it. The only time the display actually turns off is when you switch off the unit and there is no supplied utility power. When utility power does fail it is quick to transfer to internal battery power and keep the protected equipment running. It does beep when this happens, but you have to be close by and the room has to be relatively quiet or you won't hear it. This unit does not have a fan in it so it's very quiet. When you unpack it you need to remove the front cover and connect the internal battery first before you do anything else. The quick setup guide shows how to do this. It was relatively easy for me to do. The unit came with some software on a CD and a USB cable. I'm not using these as neither unit is protecting a computer, so I have no idea how good or not the software is.In the future If I needed to replace the Back UPS I'm using for my desktop computer, I will be looking to buy a bigger version of this one.

I've had the Eaton 5SC1500 plugged in for little over a week and it's been smooth sailing ever since. Yes this unit has a higher price tag than a CyberPower UPS but the quality and post-sale support from EATON are worth the price. Also the ABM should in theory have the internal battery last ~5 years. That's longer than any APC or CyberPower unit I have read about.My equipment is pulling roughly 130w of power on average. Roughly speaking that's 11% capacity of this unit with 1 hour of battery capacity if there were an outage.Now from the beginning, this UPS weighs 34lbs so be careful lifting with your back. Make sure to open the front panel to plug in the batteries when you receive the unit. Before you plug in any equipment into the UPS outlets, plug the unit into wall power to let the internal batteries charge for at least 8 hours. The elephant in the room, the loud fan. Yes it's annoying when it's running BUT that's only if the internal battery is charging. Once the battery charge state reaches >96%, the fan shuts off. I have not encountered the fan running with a higher load on the UPS as of yet. There is also a buzz of electricity coming from the front panel that is inaudible from a distance but is present when close to the unit continuously. I'd say the buzz is in the ballpark of ~10-20dB. Speaking with a EATON's technical support rep, which is very quick to respond on the phone, this is normal operation from the unit.Lastly, make sure to size the UPS to be appropriate for your equipment. My equipment will not use more than 30% of this UPS's rated capacity so the fan will never run unless there is an outage and the battery has to recharge.I will update my review should my experience change. Overall, I am a satisfied customer.

This seems to be a pretty well made UPS. Eaton is known for their solid enterprise UPS line, and hopefully this more consumer geared line is just as good. Their web site is kind of nightmare to navigate and find the right software, but you have two choices. There is the Eaton UPS Companion, which is the basic app you would probably want to use if you just want your PC to shutdown before the battery runs out. The other choice is the Eaton Intelligent Power Protector (IPP), which is much more configurable.My particular use case involves powering a small desktop PC that's always on, as well as most of my POE driven network infrastructure in my house. During a power outage, I wanted the PC to shut down after a couple of minutes, saving the rest of the battery for my network gear. I was easily able to configure the Eaton UPS Companion to shutdown the PC after two minutes on battery, however, once the PC shut off, the UPS shut off completely as well, killing power to my network gear.I emailed support about the shutdown issue and they responded quickly, within 24 hours, and informed me that the UPS Companion software doesn't have a way to configure the UPS shutdown behavior, so once the PC shuts down it's always going to turn the UPS off. They suggested I use Eaton Intelligent Power Protector (IPP) instead. I was hesitant because IPP looked heavy, designed to centrally manage many UPS units, however, the software does seem to be very light weight and there weren't any issues running on just this PC for this one UPS. I was easily able to configure it to shutdown the PC after two minutes, and leave the UPS running for my network gear.All in all I would likely buy this unit again, and I'm also likely going to purchase the 1500VA unit for my server gear.UPDATE: I did end up getting the 1500VA unit for my servers. It works great with Synology's UPS integration, so I was able to have the unit plugged into the NAS, and the rest of my servers are configured with a NUT client to use the NUT server running on the NAS to shut themselves down. I also bought another 700VA for my Navien natural gas tankless hot water heater, it's working well for that.