Surges that do damage are done in microseconds. 300 consecutive and destructive surges could pass through that UPS before it even begins to respond. Or just read its numeric specs. Where are numbers that claim protection from each type of surge? Do not exist. Too slow. No spec numbers. And many other reasons why the UPS is only for temporary power.
Apartment dwellers have numerous options. For example, the girl who reads electric meters can also install a 'whole house' protector. It is that simple if you rent it from them.
All appliances already contain superior protection. Therefore typically most 'dirty' electricity from a UPS in battery backup mode harms no electronics (but can harm small electric motors and power strip protectors).
Protection required to be inside electronics makes 'dirtiest' power from a UPS irrelevant. Same protection makes all but a typically most destructive surge irrelevant. Only a properly earthed protector can make those typically destructive surges irrelevant. Surges that occur maybe once every seven years. A number better understood by surveying neighborhood history for the past decade.
A UPS has one function. To provide temporary and 'dirtiest' power during a blackout. Protector must be located elsewhere to make the always required short (ie 'less than 10 foot') connection to single point ground.
Well my friend, let me enlighten you. My UPS catches voltage spikes often. It alerts me when it is doing so. I have been able to contact the power company when I get a constant voltage of 125v. They have to actually go to the location down the road several miles where all the funny looking equipment sets on a lot to make adjustments. They are shocked
that I am able to alert them of a problem.
In the past, I am certain these problems have been the cause of electronics failure in my home. TV has been to the shop twice in the first year of ownership. Since I added the UPS, no more problem.
My clothes dryer has a digital timer. It's fried, but working at the moment. Again, I blame the power company.
Another feature of my UPS is the boost(buck/boost). Buck is what I spoke of before. Reducing the v. What's cool is that when I am pushing my system hard, like a concert dvd, the UPS will kick on to provide a boost because I am drawing a great deal of power.
Finally, the ability to shut my system down safely in a power outage. Maybe in a perfect little cookie cutter neighborhood with underground power lines, there is no problem. But out here in the one lane, eleven lake, cabin dwelling, tree falling, wind blowing, deer rubbing, coon crawlin, squirrel chewin, red-neck built power line back-woods, it's a dollar saver.