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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 (40)
Avg. Customer Rating:  61 reviews
Sales Rank: 153
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 56 more reviews...
 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.
review August 9, 2008
Excellent product - use this one to review my usage on my appliances - Frig, coffee maker, Freeze TV etc). Got rid of my old freezer and old TV once I was able to visualize usage. Also, use it's brother on my back-up generator - AC outlet (more than a few electrical outages in Yaak, MT.) It allows me to set the generator to it's proper running speed for the correct voltage output instead of running it full bore. I use this house one to monitor the voltage output from my generator to household and appliances while I am in the house. Especially love it when I don't have to go outside and into the shed to check on AC output on those freeze your buns off times when the electrical grid and mother nature get in a battle.
 "Built-in battery backup" misleading August 5, 2008
3 out of 3 found this review helpful
Pros:
1. Retains data when unplugged from wall. Improvement over P4400.
2. Built-in calulator. Improvement over P4400.
Cons:
1. Blocks both plugs of the wall outlet so you only can plug into
the Kill-A-Watt EZ device. It should have been designed to block only 1 plug or should have included a cord.
2."Built-in Battery Backup" in manufacturer description misleading. The previous model, P4400, loses all data as soon as it is unplugged from the wall. This model, P4460, does retain the information after it is unplugged BUT it must be plugged in to read the data. I thought it had a 9V or AA batteries inside to use it without being plugged in.
Conclusion: It is an improvement over the P4400, but I was misled by the "Built-in Battery Backup" description. It probably uses a solid state non-volatile memory to retain the information anyway because I didn't see a battery inside. I am not sure I would have paid the extra $20 for the newer version with what I know now. Maybe $10 more would be OK.
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