I just installed a Progressive Industries system over Independance day. With all the AC's running in the park, and given the fact that the power poles were suspect to begin with, it wasn't much suprise taht teh voltages were low. Flirting down around the trip point of 104.
I've read several accounts of these things saving their owners while neighboring AC units bit the dust from low voltage.
Mine actually tripped several times on the trip, appearently from momentary open neutral.
I've read good things about teh Progressive Industries products, but have had mine only a short time so all I can say is taht when i called them on a holiday weekend, a real person answered the phone..... then I called back the following week and talked to a tech for maybe 20 minutes..... so customer service is top notch I would say!
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