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Chris Gohlke
05-29-2007, 05:30 PM
So, you are probably asking yourself, what the heck are we doing reviewing a power strip of all things? Well, this is no ordinary power strip. <a href="http://www.smarthomeusa.com/Shop/Smart-Energy/Smart-Strip/">SmartHomeUSA's Smart Strip Power Strips</a> promises to automatically power down your peripherals when they are not in use, thereby conserving electricity. Even if you are not into the whole environmental green aspect of this, you may very well be interested in the monetary green aspect. SmartHomeUSA indicates that this product can pay for itself in as little as six weeks depending on your usage.<br /><br /><img src="http://www.digitalmediathoughts.com/images/cgg-smartstrip-05172007.jpg" /><br /><br />After the break, using my trusty <a href="http://www.thinkgeek.com/gadgets/travelpower/7657/">Kill-A-Watt</a>, we will take a look at how well it delivers.<!> <br /><br />The Smart Power Strip works on a very simple concept. You plug your computer into the master outlet and all of your peripherals are plugged into slave outlets. The strip detects whether or not your computer is turned on or off based on the current it is pulling and cuts power to your peripherals when the computer is off. You are able to turn a knob to fine tune the switching function in the event your PC still draws a small amount of power even when off. <br /><br />SmartHomeUSA's power savings estimates are based on the assumption that your PC and peripherals are currently left on 24 hours a day and that part of your using their product would involve beginning to use the power saving features of your PC to reduce that to 8 hours per day. In my situation, my home PC had been on for 8 hours a day. I've started using the power saving functions on my computer to put it to sleep whenever I get up. As a result, I've cut the powered on hours from 8 to 4 per day.<br /><br />When I got the Kill-A-Watt last year, I was surprised how much power some things draw when not in use. The following are just a few examples:<br /><br />Altec Lansing Speakers: 3 watts<br />19" LCD Monitor: 1 watt<br />HP Scanner: 3 watts<br />External DVD burner: 3 watts<br />Laser Printer: 7 watts<br />USB hub: 5 watts<br /><br />I plugged the above peripherals along with a few other things into the switched outlets. I did not plug my cable modem, wireless router, or Slingbox into the switched outlets since I often use these when my main computer is off. In total, I plugged 30 watts of equipment into the switched outlets. <br /><br />My total computer system draws about 190 watts when fully powered. Using the Smart Power Strip, idle power has been cut from 70 watts to 40 watts. Therefore, before this little experiment, I was drawing 190 watts for 8 hours a day and 70 watts for 16 hours a day for a total of 2.64 Kwh per day or about $0.35 at my local billing rate. As a result of the above changes, I am now drawing 190 watts for 4 hours a day and 40 watts for 20 hours a day for a total of 1.56 Kwh per day or about $0.205. So I'm saving $0.145 per day, and while YMMV, it certainly seems feasible for this product to easily pay for it self many, many times over.<br /><br />This product is pretty much a no-brainer. It is a good value just as a surge protector, once you plug it in, the additional benefits of using the Smart Power Strip are completely transparent and realistically offers the ability to pay for itself. No matter which type of green you are into, I highly recommend this product. You can purchase a <a href="http://www.smarthomeusa.com/Shop/Smart-Energy/Smart-Strip/">Smart Power Strip</a> directly from SmartHomeUSA.com at prices ranging from $24.95 to $36.95.<br /><br /><i>Chris Gohlke is a Contributing Editor for Digital Media Thoughts. He loves Sci-Fi and loves to get his hands on real-life tech gadgets. He lives in Tallahassee, Florida, USA with his wife and three cats.</i>

Philip Colmer
05-30-2007, 09:42 AM
Now we just need to see non-US versions from somebody.

It does look like a good idea, though. As you say, a bit of a no-brainer.

--Philip

Philip Colmer
05-30-2007, 09:54 AM
Now we just need to see non-US versions from somebody.
Found someone:

http://www.oneclickpower.com/index.html

--Philip

cneufeld
05-30-2007, 09:21 PM
In my opinion, you're not doing a fair comparison. In the first case, you're not doing any power optimizations, so running full power for 8 hours, then reducing power for 16. In the second case, you're running full power for 4 hours, then "extra reduced" power for 20. A more accurate comparison would be to leave the number of hours of full/reduced power the same (since you could do that without purchasing the power strip), and calculating the consumption differences. By my math, you'd save about $0.065/day just by reducing the number of "full power" hours, without spending any money on the power strip (2.64Kwh vs 2.16 Kwh = 0.48Kwh * $0.133/Kwh).

Taking that $0.065 away from the $0.145 you said you'd save at the two extremes, you get a savings of $0.08/day. At a cost of $25 and a cost savings of $0.08/day it would take almost 10 months to pay for itself (312 days). Whether it would pay for itself "many times over" depends on how long it lasts and how many more devices you find to plug into it.

I guess my point is that you can save $20 just by implementing some form of power conservation without spending any money in a 10 month period. The next step is to save another $25 by buying (and using) this device. And the final step would be to combine the two measures.

Clint

Chris Gohlke
05-30-2007, 09:37 PM
You are spot on in your analysis. I thought I made it clear in the article that the savings I came up with were from a combination of using the product AND changing my power settings. Although implied I did not outright state that the bigger % of the power savings from my experiment came from the change in power settings. This is a good point for everyone since you can save electricity without buying anything.

My actual savings from the product are 30 watts x 20 hours of idle time or .6 kwh per day which is as you indicated about 8 cents a day. I expect this surge protector to last many years at the least, so I fully expect that it will pay for itself many times over.

Also, if you include the fact that this really does not cost any more than other quality surge protectors, it really is a no brainer if you need a surge protector anyway.

Jason Dunn
05-30-2007, 09:54 PM
I'd like to see technology like this put in a UPS.

Chris Gohlke
05-30-2007, 10:07 PM
Actually, I plugged it into a UPS. :D