Model # P4400

Internet #202196386

null Kill-A-Watt Electricity Monitor

Kill-A-Watt Electricity Monitor

  • Designed to help you assess the efficiency of your appliances
  • Cut down on costs by monitoring your expenses over time
  • Features a large LCD display for easy visibility
$1897 /piece
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Product Overview

This Kill-A-Watt Electricity Monitor is intended to help you cut down on costs and find out what appliances are actually worth keeping plugged in. The monitor will assses how efficient your appliances really are.

Info & Guides

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Name Test and Measurement Large Meter Case Kill-A-Watt Electricity Monitor Dual Range Non-Contact Voltage Tester Non-Contact Voltage Tester with Flashlight
Brand Milwaukee Klein Tools Klein Tools
Ratings (2) (69) (9) (74)
Test Meter Type Voltage Tester Voltage Tester Voltage Tester Voltage Tester
View Product View Product View Product View Product



Product Depth (in.)
Product Height (in.)
Product Width (in.)


Control Type
Display Type
Data Log/Record
Product Weight (lb.)
Test Meter Type
Voltage Tester
Tools Product Type
Test Meter

Warranty / Certifications

Manufacturer Warranty
6 months

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Customer Questions & Answers

will it measure amperage?

Will it measure amperage, and if so how many amps will it measure?
Asked by: BillyBob66
Answered by: Sebastian
Date published: 2017-04-29

Does this thing read Peak or Surge usage?

Anybody know if this will measure Surge power?
Asked by: Number19
yes, it will; but you have to watch for it.
Answered by: Sebastian
Date published: 2016-11-18

hello, can I use it on an air conditioner, and a refrigerator at the same time. or how many watts can I run through i

Asked by: jjj
Yes, but........... I have a 30A, 120v RV outlet. I plugged an adapter pigtail into the outlet, the Kill-A-Watt into the pigtail, a heavy extension cord into the Kill-A-Watt and two electric space heaters into the cord. One space heater on high read 13A agreeing with an analog ammeter. When the second space heater was turned on low, the ammeter reading on the Kill-A-Watt was over 17A but the display was flashing and it emitted an audible beep. I didn't get to test at the high setting as the second space heater shut down (It never worked very well anyway). So yes, it will read above the rated load but you probably would get tired of listening to the beep. I'm sure the rated load is based on the standard 120v plug and socket which only have a 15A rating, but can carry much more safely. Inside the Kill-A-Watt the plug and outlet are wired straight through except that the hot side is shunted to allow amperage and wattage measurements. The other functions of voltage, frequency, VA, PF. total wattage and time are independent of current load.
Answered by: teejay45
Date published: 2017-07-11

Does this meter work in 220V circuits?

Asked by: Denny
No, max voltage is 120vac
Answered by: Sld3313
Date published: 2016-02-04
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Customer Reviews

Kill-A-Watt Electricity Monitor is rated 4.4 out of 5 by 69.
Rated 5 out of 5 by from Is it a tool or a toy? In preparing my house for a backup generator I had to track all of my circuits. Websites get confusing as to how much watts a average product uses. The Kill-O-Watt allowed me to record 1 minute usage of my electronic devices to provide actual usage both active and standby. It can also be used to help lower your electric bill by identifying the "vampires" or heavy users. As a toy you can leave it on any appliance for a week to see how much kWh that device used. It also provides loads of information that can be helpful in re-wiring a house. I love it and am glad to have bought it.
Date published: 2011-07-23
Rated 5 out of 5 by from Excellent Item for Saving Money This item does not require any tools or batteries. Just plug it in then plug and electric item into it. It will keep track of how long it has been plugged in and also record the electricity used. To reset it simply unplug it and plug it back in. We have used it on two refrigerators, a heated waterbed and all the other electronic devices in our home. Based on the changes we have made this item will pay for itself in about five weeks. This item also alerted us to a malfunction in an item that could potentially have caused a fire.
Date published: 2013-07-06
Rated 5 out of 5 by from Accurate power readings I purchased this device to check all my power draws on the stuff we all have plugged in around our houses. I was shocked to find out how much some of the stuff draws even when not running. This unit will show you if your power voltage and cycles is what it should be at your appliances. It also tells you the amperage and wattage draws of the equipment you plug into it. On items that are randomly switched on you can set it to meter the power usage over whatever time frame you let it hooked up thus giving you a more accurate analysis of the true consumption of that particular item. I found out through my checking that I use about $200 worth of electric per year on simple things that are normally sitting waiting to be used. An eye opener.
Date published: 2011-02-07
Rated 5 out of 5 by from A great add on for power monitering The first time I saw this item was not at Home Depot... paid way more than it costs here. I really appreciate being able to see what the Hz frequency is on the power line and on my generator. I can tweek the throttle to set it closer to what it should be. The only thing I wish there was a model which was for 220-240 VAC and one that was good for 5.5 - 6.0 KW. That would cover most all loads found in a home or RV. A model with a led back light would be wonderful as well since it is usually dark when the generator is running. The third thing that would be nice is to have a short cord coming out of the bottom to plug into instead of head on.
Date published: 2014-01-18
Rated 4 out of 5 by from Helpful Tool to Determine Usage I was so excited to try this monitor on my refrigerator to see electricity usage. The monitor displays many different items, volt, amp, watt, Hz & KWH. This is a good tool to use to see what items in our home use the most KWH. The only downside is this cannot be used with an electrical extension cord. What refrigerator plugs into a socket you can see? You have to view the readings while the monitor is plugged in. That makes it almost impossible to use for a refrigerator without pulling out the refrigerator and taking readings while the monitor is plugged in. There is no memory, so when unplugged, you lose the readings. This is a good idea, but really only useful on items where you can get your face to the plug to read the output.
Date published: 2016-02-04
Rated 5 out of 5 by from kill a watt just plug it in to the wall, then plug the device you want to be measured, you see just how much energy you are using. You will be amazed how much power that t.v. is useing , even when it is off ! I have been shutting the t.v. and the verizon box down compleatly, and saving over 15 KWH a month on just that alone , i give this product a big thumbs up !
Date published: 2011-05-02
Rated 5 out of 5 by from Nice kWhr meter, easy to use Easy to use, just plugged in an extension cord from the wall so I could put the unit on the top of the refrigerator, then plugged the refrigerator into the unit. I look a the energy used every few days and the elapsed time to easily predict monthly and yearly energy consumption. The old refrigerator isn't so bad after all. I calculated that it would take 9.6 years to break even if I purchased a $1,000 energy star rated refrigerator. I guess I'll hold onto the old refrigerator as long as it keeps consuming a fairly low amount of energy. The home depot pickup was also a breeze, just showed my ID, signed the paper and said thank you.
Date published: 2014-07-16
Rated 5 out of 5 by from Just what I needed Doing an Animated Christmas Light show that is synchronized to music, takes a bunch of lights, controllers and extension cords. I have 7 controllers for a total of 112 light connections and 14 power connections. With the Kill-a-Watt, I was able to determine how many amps each controller with lights attached will pull. I can run all 7 controllers on one circuit. Thanks to this wonderful piece of equipment, I don't have to put in a sub-panel and run extra electrical to run the show. Fantastic tool.
Date published: 2012-06-05
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