At our office, most of our machines have a similar UPS to the one you are looking.. The APC 500VA 0r 550VA models put out about 330 watts for a limited amount of time and will allow the user to shut down normally if a power outage occurs. Fifteen minutes or less is all you get depending on your wattage.. Still, the UPS models generally provided by large retailers are NOT the most powerful, longest lasting, and most expensive. Check out the APC website and look at the variety of products they have.

On the other hand, we have a few devices, such as servers and ethernet switches in our office which we want to stay on a little longer should the power go out.. For those, 750, 1000, or 1500 commercial versions work for us..

For most homewowners, the model you're looking at will probably do fine. Still, it's your choice as to how much money you want to throw at the device.

Hope this helps.