Maruson800VA UPS, AVR, 735J Surge Protection, 6 Outlets, Line Interactive Uninterruptible Power Supply Battery Backup System, TUV Certified, 800VA/450W, PRO-800LCD

This review is based a on a very limited use of the units as I've only had them about a week.I purchased two 800VA/400W units for backup power and line conditioning for a home internet and security system. The units arrived with batteries mostly charged (minimal time plugged in to AC power was required for the batteries to be back at 100% charge). The units are small and sleek, with an LCD display that turns off after a short period. Briefly pushing the power button again illuminates the LCD display.Downloaded and installed the Power Management software and was able to view/modify unit configuration from a laptop using the USB cables included with the units.First impression is that these units are a real value for the price with both battery backup and line conditioning features (as opposed to only battery-supplied power).The only downside I've seen so far is that the clamshell cases are plastic (not metal) and both units arrived new with the clamshells not aligned properly. I don't know if this was due to the shipping company manhandling the packages or if the assembly process isn't as precise as you might like. Unscrewing the clam shell cases allowed me to reseat both to fit together as they should, but one of them apparently has one screw hole with a broken screw socket (I can hear it rolling inside the unit when I tilt it sideways) and there's nothing for that screw to tighten in the single corner of one unit.Otherwise, I feel like I'm getting a pretty good value for the price on these units compared to the price of similarly-featured competitor products.

The media could not be loaded.  I have two APCs (one about 20 years old, one newer) as well as 15-20 year old MGE Mirage which recently died. APC and Tripp-Lite seem to be hit or miss out of the box and the units themselves (not the batteries) only last a few years now, so I've been trying to find a new preferred UPS brand for devices in my home. Maruson got some decent ratings so I wanted to give them a try.The UPS itself seems to work fine. It's noisy when it runs on battery, unlike my older MGE and APC units, but since I'm rarely on battery I'm OK with that. However what's absolutely not acceptable is that when plugged into the wall, even if there are NO devices connected, the unit has an extremely high pitched noise that it constantly emits. Rough guess it's about 15kHz and maybe 20dB - not loud, but it's extremely high pitched and constantly in the background.I suspect the power supply in the unit is just noisy. Maybe it's cheap chinese crap and these are even worse than APC or Tripp-Lite, or maybe it's defective and I got unlucky. Rather than return it and try another one (since these are heavy and I don't want to drag it to a shipping center) I reached out to the company. After sending them a video they told me "Based on the video, the UPS is operating normally." Maybe all their UPS's do this, but other companies don't.Ultimately I may still keep this to avoid the hassle of sending it back. I have a NAS and cable modem in my basement which are on a (quiet) APC UPS which I may just swap with this one, since it's in an unfinished section of my basement and the fans on the NAS are loud enough to drone out the high pitched whine.Video attached had my phone close to the UPS to pick up the noise, but when I'm sitting at my desk with the UPS on the floor I can hear it. If you turn up the volume you can hear the continuous tone it emits.

Came across Maruson when I was looking to replace an older UPS that had wonked out on me. So ordered and hooked this one up. Running it for the last few weeks, I’ve been pleasantly surprised at the great value I’ve got out of this one.I have it hooked up to my main pc which also happens to be a server (files, printers, etc) for the house. Tested it a few times by flipping the breaker and the unit transfers seamlessly to battery power. Battery lasts 5-10 minutes (also shows up on the LCD) which is pretty standard and plenty for the auto windows shut down to kick in. The software and USB hook up is a lifesaver since you can set it up for the auto windows shutdown.Anyways, great value and I’m glad I didn’t have to shell out an extra $100-200 for a fancy one that does exactly the same thing.

I've only had it for a few weeks, but it was simple to setup and works well. I'll be exploring more of it's features soon and will update this review. It is a great UPS for the money.

I have $20,000 worth of equipment connected to two separate ones. I don't know why when I look back now and see 2 negative reviews by @Gob, and @Tomf. Their claims aren't accurate by any means. This Is a fantastic UPS and the seller had no impact on my verified response on the product. It's just disheartening to see people bash on a product that is cheaper and more energy efficient then the other 1200w ones out there on the market. Hopefully people read more into what they buy and problems like these could be avoided. *Cough, Cough* Have a nice day all!!!

The media could not be loaded.  Used to keep my cable modem up when the power flickers. Now it just power cycles on its own. Completely useless.

Looks durable, seems well designed, and does its job well. The only downside was seeing those unrecyclable, infernal styrofoam “peanuts” inside the outer box packaging. Great value after scoring a $20 coupon at TechBargains.com.

Day after it arrived, it was fully charged, well the power went out for about an hour and it maintained my surveillance system camera and NVR system. Very happy with it as it charged right back up.