Well, we've had some wicked weather and winds out on the rock the past week or two. Early one morning Mrs. Roadhouse got me up because the lights were dimming as the house shook and creaked. She had the TV, STB and AVR turned on and everything was working great. The computer system got a little shagged up with the modem and router, most likely due to the brownouts we were experiencing. I checked the Tripp Lite unit several times and the voltage was all over the place. The battery level indicator was also down to about 60%...which to me means the unit was doing what it was supposed to be doing. Once things settled down weather wise, the Tripp Lite battery charged back up and everything's been OK since.
I think there's another one on the way for the computer.
Hope this gives good indication of what this type of unit can do.