Damn you filtered with UPS!
Ahhhh....I have been to tooo many taskings where a power surge went through the house electonics when the storm went through.....not nice on a TV, stereo, computers, etc....
As stated before, I use this at work in the Adelaide CBD to find out what is happening to distributed power around the state. Gives a good heads-up that a country hospital computer server is about to shutdown because the UPS batteries have gone flat.