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P3 International P4460 Kill A Watt EZ Electricity Usage Monitor | 
 enlarge | Brand: P3 International
Category: CE
List Price: $59.95
Buy New: $31.94
You Save: $28.01 (47%)
New (41)
Avg. Customer Rating:  63 reviews
Sales Rank: 106
Color: Gray
Media: Electronics
Autographed: No
Memorabilia: No
Shipping Weight (lbs): 1
Dimensions (in): 1.5 x 2.3 x 5
Legal Disclaimer: Warranty does not cover misuse of product.
MPN: P4460
Model: P4460
UPC: 751549044603
EAN: 0751549044603
ASIN: B000RGF29Q
Availability: Usually ships in 1-2 business days
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| Features:
| | Shows the operating costs of your household appliances | | | Accurate within 0.2% | | | Calculates cost and forecasts by week, month and year | | | Displays eight critical units of measure on the large LCD display | | | Built-in battery backup |
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| Editorial Reviews:
Product Description
Connect your appliances into the Kill A Watt and measure how efficient they are. LCD display counts consumption by the Kilowatt-hour just like utility companies.
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| Customer Reviews: Read 58 more reviews...
 Great Item August 28, 2008
I highly recommend this item. The only thing wrong with it is you need a small, grounded, high amperage (15A) extension cord as the P4460 plugs directly into the wall. Otherwise, this is a very useful piece of equipment that worked right out of the package. Being able to calculate daily, weekly, and monthly electrical costs of a particular appliance is extremely informative as well.
 Find out for sure what your gadgets really cost August 24, 2008
After hearing all the hype on TV about how much energy all my chargers were using just sitting there, I decided to find out for myself.
The Kill A Watt is easy to use. Just input what your electric rate is and you can find out instantly what that charger costs (when charging or just sitting there plugged in). Turns out my chargers only used pennies a year when not being used and only a little more when charging. Not worth the trouble to keep unplugging them.
You get the cost by hour, day, week, month and year. For a device that cycles on and off just leave it plugged in for say 24 hours and you can see what was actually used and a projection for any of the time frames above. I found out our small freezer was only using $6.84 a month, well worth the savings and convenience of having a freezer.
The only drawback is that the monitor plugs directly into the wall which can make it a little hard to read. The easy solution is using a short (3 prong) extension cord to get it away from the wall. Even if you do unplug it the data is retained until you press the reset button.
Pressing reset does not erase the rate...easy to change ...as the rates go up and up.
Why didn't I buy this sooner? August 19, 2008
This unit is really easy to use and with the calculations it performs you just plug it in and leave it. For most products you only need to have this plugged in for 24 hours to get a good average. Other things like tvs that get more usage on the weekends needs to be plugged in for about a week. I didn't find the screen hard to read but a 3' outlet strip works well for easy access.
Household electricity cost management August 18, 2008
Terrific product.
PROS: Easy to use yet as much detail as you want. Provides hourly, daily, weekly, monthly and annual costs with the push of a button. Have used for weeks determining costs on Frig, Freezer, TV, window air conditioners and computers. Helpful in making appliance decisions. Allows you to enter local price per kilowatt, which is critical in comparing to new appliances. Before you compare to Energy Star ratings look at what price per kilowatt was used in their calculation and match to yours. Locally we pay $.1602 (16 cents per KW - most rating labels show 6-10 cents). This device saved me from buying new appliances that I thought were a problem but are not the problem.
CONS: Can only do typical 110-120 volt appliances. Cannot do 208-240 volt such as your clothes drier and range/stove.
NOTES: I am copying all appliance data from P3 into spreadsheet to have a 90% picture of all my electricity usage (minus hot water heater, range and drier). Then I can start a more intelligent approach to electricity cost management. Every homeowner should have and use one of these P3 Monitors on a regular basis. Highly recommended.
Does what I needed August 10, 2008
I took the chance and bought a P4460 Electricity Usage Monitor, even though some of the reviewers recieved some bad units. Fortuneatly, mine works fine.
I think the interface is very easy to use, and it does what I'm looking for. Plug it in and an appliance into it, and right away it measures volts and watts and starts keeping track of time and kilowatts (as well as other items). Enter the cost per kilowatt from your electric bill, and it gives you a running tally of what you are paying to run it. The two values it adds over reading the manufactures tag on power consumption and doing the math is that the tags can be off by quite a bit and are usually geared to reporting the max the appliance uses. The other is that this captures how much you are actually using the appliance, especially one like an air conditioner that might use 100 watts when just the fan is running, but jumps to 1000 watts when the compressor kicks in.
Time will tell how durable it is, but the construction appears to be solid.
As far as accuracy goes, I did a few tests, but I did not have a reliable/calibrated known load to measure. I used a lamp and swapped in numerous bulbs of different wattage and a good quality electric heater with 700 watt & 800 watt heating elements. For everything I measured other than one bulb, the meter reported a lower reading than what the manufacturer claimed (e.g. 630 watts for the 700 watt heater setting), generally about 5 to 10% lower. I guess it's possible that the meter is correct. I compared it's voltage reading to a pretty good quality volt meter and they were about 1 volt apart. Even if it's off by 5-10%, it's fine for my purposes.
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