I don't have this model, but I do have a Powersave 1200 which is similar. I read all of the "it doesn't work vs it does work" comments, so I'll add my 2 cents worth. After installing my unit, I ran a daily two month test, to measure the devices affect on amps. Since I don't know of any way to easily measure watts at the power panel, which is how electricity is billed where I live, I measured amps and volts. However, watts can easily be calculated using the formula of Volts X Amps = Watts; both of which are easy to measure with a multimeter. I used a clamp on multimeter and measured the volts and amp draw on both sides of my power panel with the device turned off, then immediately turned on. Over the two month period, the weather varied tremendously, so the amp draw jumped around greatly depending upon what devices were running at the time. It was very clear that the device was impacting the amp draw on my panel. On the left side the amp draw average for the two months was 19.6 amps with the device off and 16.3 with the device on. This is a 16.8% reduction. On the right side of the panel it averaged 17.3 amps off, and 13.6 amps on for a 21.4% reduction. Overall the drop was from 37.0 amps to 29.9 amps, or a 19.2% reduction in amps. This was not a scientific study and I'm not an electrician, but my test did clearly show the impact of the device on current draw at my home. In conclusion, I'd say the device works, although it didn't show the kind of reductions claimed in some of the advertising; of course, what does?