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Item#: 9SIA9FT3E03565

P3 P4490 Kill A Watt(r) Edge Energy Monitor

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Shows Operating Costs Of Electronics Eliminates Standard & Vampire Power ProgrammableEasy To Use Built-in Motion Sensor Calculates Carbon Footprint Savings


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  • Alexander B.
  • 8/20/2014 3:05:22 PM
  • Ownership: 1 month to 1 year
  • Verified Owner

3 out of 5 eggsWorks OK, but...

Pros: Reads power draw, voltage, and calculates how much power it has used in a given time and can tell you what it cost (assuming you program your energy rate cost into it).

Cons: After a power outage, it turns itself off and does not turn back on until you hit the power button on top.

Other Thoughts: I got this to monitor how much power my servers were taking so I could be sure to pay all of that each electric bill (didn't want my roommates splitting that cost with me and make them mad). I have a UPS plugged into it for back up power. When the power goes out, the unit turns off (as expected due to no power), and my UPS runs the equipment. However, once the power returns, the unit does NOT restore power to the UPS, which causes my UPS to completely die and turn off power to all connected equipment. I have to manually go and turn power back on to this device and all of my servers. That is a dumb design, once power is restored it should just start delivering power to the connected equipment by default, and if you want to use the energy saving feature you should have to enable that manually, not the other way around. I can disable all energy saving features, but when the power goes out and the unit turns off, it looses all settings I program into it and returns to factory defaults (power savings on, does not restore power to connected equipment till I manually hit the power button).

I have had 3 power failures now, all three had similar results. The first two I got VERY lucky. The first one I was asleep, didn't even knew the power went out. Got up to get some water and heard the battery backup beeping. Power was out for only 5 minutes according to another UPS I have, but the server battery backup reported no power for 40 minutes! The battery was very close to dieing. The second time I was sitting at my desk when it happened and I watched it when the power came back. The unit turned on, but did not restore power to the equipment until I hit the power button on top.

I need something that has no power saving features but a detachable screen (the outlet is behind a server rack and is hard to see where it is). I put the screen part in the rack on top of my router so I can see it from the front of the rack. The fact that it came with power saving features was no big deal, or so I thought. I have since unplugged this unit and just have the UPS directly into the wall. I will have to work something out with my roommates because I am NOT using this device for my servers any more.

DL;DR - Works fine for simple appliances. Not good for computers or anything you want to turn back ON automatically after a power outage.

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  • Karl D.
  • 4/9/2014 9:04:16 PM
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsmust have for DIY systems

Pros: Display is attached by a cord so you don't have to have a sight line to your power outlet.

Continuous updates, easy to use.

Cons: There were no cons, this is now a valued part of my repair kit.

Other Thoughts: Any system I work on now, I measure the watt draw of the power supply as part of my diagnostic routine, and it helps me estimate the power requirements of new systems.

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