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kuman KW47-US Electricity Usage Monitor Plug Power Watt Voltage Amps Meter with Digital LCD, Overload Protection and 7 Display Modes for Energy Saving , White

4.5 4.5 out of 5 stars 4,862 ratings

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  • Electricity Usage Monitor:Meter Plug monitors the power,voltage,amperage, frequency,power factor,energy,cost,minimum and maximum power of an appliance.With 7 display modes,you can easily understand the various parameters of the appliance while it is working.This monitor is a killer appliance for high cost energy consuming appliances and helps you to reduce energy consumption and save money
  • Overload Protection:Once the whole power exceeds the rated power of monitor,LCD will display "OVERLOAD" with booming noise to remind the user, you need to set the overload power to 1800W before use
  • Data Memory Function:When you unplug the wattage meter from the socket or remove the appliance from the power monitor, the power meter will save your power consumption data.The next time you use it,you can directly see the last data.This function also saves the data automatically in the event of a sudden power failure
  • Digital LCD Display:The voltage meter large,clear LCD screen provides a clear view of the data day or night.Recorded data are clear and easy to read
  • Ideal Choice:Our watt meter power analyzer is perfect for monitoring the electricity usage of your home appliances,controlling your power consumption,and saving your money.Your best choice for power usage meter,kilowatt meter,amp meter,kwh meter,current meter and electricity meter
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Product Description

Electricity usage monitor

KUMAN Electricity Usage Monitor Plug

  • Power Consumption
  • Energy Saving
  • Environmental Friendly

Warm tips:

The power of electrical appliances can not exceed 1800W.

For latest instruction, please have it on "Product guides and documents". Thanks!

7 Different Display Modes

1

NOTICE

1. * With electricity expense calculating, you can monitor which appliance cost the highest energy and how much your standby appliances cost. In this way, you can determine how to low your power consumption.

2. * When the current exceeds 16A, the "overload alarm" icon flashes.

3. * If you receive the item and it do not power on or display, please plug it into the AC outlet for 10 minutes and press the reset button to reset.

4. * If you don't use it for a long time, you need to plug it into the AC socket for 15 minutes and press the reset button to reset it.

The power of electrical appliances can not exceed 1800W.

1

Overload Protection

The LCD will flash "OVERLOAD" to warn the users when the power exceeds to 1800W.

1

Date Hold Function

It keeps track of how much power your socket has been using for a while, and you can calculate the charge to save you power and cost.

1

Easy Reset

Easy to reset the device by the middle reset button.

Electricity usage monitor

Specifications

  • Operating voltage: AC 120V
  • Operating Frequency: 60Hz
  • Wide voltage range: 110V-130V
  • Operating current: 15A Max
  • Wattage display: 0W-9999W
  • Voltage display range: 0V-9999V
  • Frequency display: 0Hz-9999Hz
  • Current display: 0.0A---15.0A
  • Cost display range: 0.00cost/kWh---99.99cost/kWh
  • Timing display range: 0 second---9999 days
  • Total kWh and cost display: 0.000kWh---9999kWh,0.00cost---9999cost

Package listing

  • Power meter *1 (US plug)
  • User manual*1

Notice:

  • Mode 7 can directly occur while press down the button ”cost”
  • If an abnormal display appears or the buttons produce no response, the instrument must be reset. You can press the RESET button to reset it.
  • Please read the numbers on the front angle of the LCD screen, not from the side view.
  • If you don't use it for a long time, you need to plug it into the AC socket for 15 minutes and press the reset button to reset it.
  • The power of electrical appliances can not exceed 1800W.

Product guides and documents

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Product information

Technical Details

Additional Information

Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.

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kuman KW47-US Electricity Usage Monitor Plug Power Watt Voltage Amps Meter with Digital LCD, Overload Protection and 7 Display Modes for Energy Saving , White
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PriceCurrently unavailable.-6% $10.99
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Customer Ratings
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Customer reviews

4.5 out of 5 stars
4,862 global ratings

Customers say

Customers find the product functional and easy to use. It provides accurate power consumption readings and is a good value for money. However, some customers find the display difficult to read at an angle.

AI-generated from the text of customer reviews

222 customers mention "Functionality"179 positive43 negative

Customers are satisfied with the product's functionality. They mention it works well, has no issues, and is useful.

"...Purchased in August 2021, these lights continue to work well here in the SE, saving us over 150 kWh/year...." Read more

"Works great really like this product would recommend" Read more

"It works fine but the picture depicted high power appliances while in fact it can’t go beyond 1800 watts, that’s why I ended up returning it." Read more

"Did exactly as advertised and helped with some tests...." Read more

174 customers mention "Ease of use"125 positive49 negative

Customers find the product easy to use and understand. They mention it produces a variety of measurement, provides the data needed quickly, and has an easy-to-understand instruction manual. The button is simple to use and connects easily. It's a great tool for working out load requirements for a solar system.

"...These were easy to put in, sealed with Great Stuff: www.amazon.com/gp/product/B00KSANBTY..." Read more

"...It was very easy to enter my current electricity rate, although I was only able to enter a single digit of the kilowatt hour cost...." Read more

"Gives you the data that you need in a quick and easy fashion." Read more

"...So most of the time, these instruction manuals are a disaster...." Read more

102 customers mention "Power consumption"93 positive9 negative

Customers like the power consumption meter. It's handy to see how much electricity a single device is using. The meter allows you to see how many watts and amps specific appliances are drawing, as well as useful in determining any products that are using more electric than expected. Overall, it's a good product with accurate readings that hold the data even after pulling it out of the outlet.

"...They allow us to monitor temperature and humidity in four places at once: outside, in our living room, in our crawlspace, and in our unfinished attic..." Read more

"I like the big display, I like the fact it can measure the high water mark of power (watts) because I need to find the max output of my lathe motor-..." Read more

"This is a good estimator of my electricity usage. Provides fair estimate of how much power has been consumed." Read more

"This sort of meter is handy to discover how much electricity a single device (or multiple devices connected to a power strip) use under various..." Read more

77 customers mention "Value for money"77 positive0 negative

Customers appreciate the product's value for money. They find it accurate and reasonably priced. The product has decent quality for the price point. It allows them to see savings and holds cost information when reset.

"...Plug has been one of our wisest and most useful moves, and a very inexpensive one at that...." Read more

"...So far it seems like a great value and I'm hoping to learn a lot about my power consumption." Read more

"...I love the min wattage and max wattage reporting. The cost calculator is also very good.Build quality is okay...." Read more

"...I just bought the Kuman KW47 as it was one of Amazon's best sellers, economical, and had decent reviews...." Read more

32 customers mention "Build quality"17 positive15 negative

Customers have different views on the build quality. Some find it durable, simple to use, and useful for determining electricity draw from appliances. Others say it's not worth the cost, cheap, and not of good quality.

"...The cost calculator is also very good.Build quality is okay...." Read more

"This gives the power usage pretty good but it would not give the cost correctly...." Read more

"...but in the end it did what i needed it to do and so far it hasn't fallen apart" Read more

"...My real issues with this unit are:1. No UL certification, so if your house burns down, no insurance.2. It has no clock, just a timer...." Read more

61 customers mention "Display readability"8 positive53 negative

Customers find the display difficult to read from different angles. They mention it's hard to see from above, the numbers are difficult to see unless in well-lit areas, and the screen has low contrast and is challenging to read at night. The display has terrible viewing angles, and some customers report incorrect readings.

"Read out a bit dim. Measurements a bit off but close enough. Good so far." Read more

"...Yes, the display is a little dim, but if you look straight at it and about a foot away, its very legible." Read more

"...supposed to do, but without a backlight, it's next to impossible to see the display numbers...." Read more

"...The only downside I have is that the screen is kind of hard to read. If you aren't at the right angle then you can't see anything." Read more

48 customers mention "Backlight"5 positive43 negative

Customers find the display difficult to read without backlighting. They say it's dim and needs a flashlight to read it properly.

"Other than no backlight, the wattage meter works fine." Read more

"...As others have noted, lack of a backlight means you often need a bright light to read the display in dim corners etc." Read more

"...I wish the display was brighter, but hey: for about half the price of the competition, AND to report the Hi watts (surge watts), this is..." Read more

"...that while this meter has a nice big and clear LCD display, it's not backlit, so in low light situations you will likely need a flashlight to read it..." Read more

Simple, cost-effective power tracker
5 out of 5 stars
Simple, cost-effective power tracker
My first use for this power meter will be to investigate the consumption of my window mounted heat pump air conditioner. It was very easy to enter my current electricity rate, although I was only able to enter a single digit of the kilowatt hour cost. Maybe I'm doing it wrong. My rate is basically 30 cents per kilowatt hour so a single digit was not a problem for me. I will update this review when I've had more experience using this device. So far it seems like a great value and I'm hoping to learn a lot about my power consumption.
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Top reviews from the United States

Reviewed in the United States on March 31, 2022
To reduce expenses and to help protect the environment, in early 2021 our household started taking a number of measures to cut our energy consumption. Those measures have proven successful: total 2021 electricity consumption in our single-family, detached home in the US SE was about 8,000 kWh (3,200 of which was for HVAC), compared to about 11,000 kWh annual average in previous years. [UPDATE on 1/1/23: our total electricity consumption in 2022 dropped even further to just 5,500 kWh (1,600 of which was for HVAC) for the year. We have HALVED our electricity consumption. Huge savings. This electricity usage monitor continues to operate beautifully. We lend it to friends and family so that they can do their own diagnostics at their homes and see where they can save.]

Looking back, we can say that purchasing the Kuman Electricity Usage Monitor Plug has been one of our wisest and most useful moves, and a very inexpensive one at that.

The Usage Monitor Plug helped us to gain really eye-opening – and often surprising – insights into our electricity usage, allowing us to identify specific steps we could take to reduce consumption. Most importantly, we learned that “phantom power,” or the energy consumed by things when they are plugged in but not being used, accounted for a lot of our waste. Here are just a few examples:

We discovered that our microwave used 64 kWh annually … in standby mode. We estimate that our actual annual use of the microwave takes less than 60 kWh. We now unplug it when we’re not using it.

Another big consumer is our modem/router, coming in at 88 kWh/year. We now unplug it when the last person calls it a night. For people with set schedules, a timer switch would also work.

Among the other major users of phantom energy are our TV w/ accessories (138 kWh/year when not being used but left plugged in) and our CD player (60 kWh/year in standby).

One final example: Our rather old dishwasher is a real glutton, coming in at nearly 700 kWh/year. Newer, more energy-efficient models use less that 200 kWh/year. The next time our dishwasher breaks down, we will replace it rather than repair it.

Finally, here are some other products we purchased at Amazon that we can recommend to those interested in cutting home energy consumption:

Klein Tools TI250 Rechargeable Thermal Imager: www.amazon.com/gp/product/B089QW8R9S This tool, along with the Usage Monitor Plug, gave us a very good picture of where we were wasting energy. It was thanks to this tool that we realized, for example, that our then uninsulated recessed lights were really problematic, prompting us to purchase the following.

FF130E Recessed Light Cover: www.amazon.com/gp/product/B002XVPUAO If you have recessed lights and they’re not well insulated in the attic, energy wastage can be massive. These were easy to put in, sealed with Great Stuff: www.amazon.com/gp/product/B00KSANBTY

AcuRite Wireless Indoor Outdoor Temperature and Humidity Sensor: www.amazon.com/gp/product/B00T0K8NXC We got two of these to go with our AcuRite weather station. They allow us to monitor temperature and humidity in four places at once: outside, in our living room, in our crawlspace, and in our unfinished attic. Thanks to these readings, we have established a smarter, more energy-efficient way of ventilating our crawlspace. They also helped us see that our attic needed additional ventilation in the roof, prompting us to purchase the following.

4 SEASONS Solar Powered Polycarbonate Vent, Weatherproof Design, Quietly Cools Up to 500 Sq Ft, 400 CFM: www.amazon.com/gp/product/B01DMSCPJA

Aootek solar lights 120 LEDs with lights reflector, 270 degree Wide Angle, IP65 Waterproof, Security Lights for Front Door, Yard, Garage, Deck (4 pack): https://www.amazon.com/gp/product/B07NQ4L1SB , as well as Solar Lights Outdoor,WWimy 210 LED 2500LM Motion Sensor Lights with Remote Control, 3 Heads Security LED Flood Lights, IP65 Waterproof, 270° Wide Angle Illumination Wall Lights with 3 Modes (2 Packs): www.amazon.com/gp/product/B08T9F2MM1 Purchased in August 2021, these lights continue to work well here in the SE, saving us over 150 kWh/year. We shared some of these lights with relatives in the North; they also report that their lights are going strong after a rough winter.

STATINT Window Film Privacy One Way Daytime Mirror Static Non-Adhesive Solar Glass Film Heat Control: https://www.amazon.com/gp/product/B07W3VCZNF

RYB HOME Room Darkening Patio Door Curtain, Hanging Room Divider Screen Insulated Drapes Privacy Wall Panel: www.amazon.com/gp/product/B07D32DJ2V , as well as RYB HOME Blackout Curtains & Drapes - Total Privacy Thermal Efficiency Backdrop Curtains for Bedroom Room Divider Vertical Blind Living Room Patio Sliding Glass Door: www.amazon.com/gp/product/B077SZRBNJ

Grandekor Blackout Window Blinds and Shades Cordless Cellular Shades: www.amazon.com/gp/product/B07NWBGVL3
128 people found this helpful
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Reviewed in the United States on November 5, 2024
Works great really like this product would recommend
Reviewed in the United States on July 11, 2023
I ordered the power monitor just out of sheer curiosity. I've tested it out on a couple window air conditioners, a microwave, a few different small items like lights and speakers, etc. I might begin by issuing a warning, at first I thought I had set it for my electricity price of a little more than $0.12 a kilowatt hour, which I rounded up to $0.13, but I had it set for $13! Big difference, so be careful when programming it. I thought it would be shocking to see how much power everything uses, however I've learned that things don't use nearly, and I mean nothing anywhere near, what I thought they did. For example, the largest power user (on the 120 volt side of things, not speaking for 240 volt) in my home is a large window A/C. I plugged it into the monitor, and when the compressor is kicked on and running it draws around 1,200 watts. According to the monitor, with the price of electricity in my area being somewhere below $0.13 per kilowatt-hour, that's something like $30 per month. That may seem like a lot but may I remind everyone that it's early July and here in the south it's been around 95° in the daytime so that A/C has been running a LOT. As for lights, led of course, they're hardly worth mentioning because they take such a low amount of power that I doubt every single bulb in my home pulls a quarter, or maybe even an eighth, as much power as the large window A/C I mentioned. I know this sounds like an entitled, snobbish, arrogant thing to say, but it's hardly worth the effort of getting up out of a chair to walk across the room and turn a light off if you're turning it off to keep from using too much power. If only one 12 watt led bulb ran 24/7 it probably wouldn't take maybe $0.25 a month to run it. I was raised very poor, and still am not wealthy AT ALL, but I'd rather pay a few cents as opposed to sitting in the dark all the time.
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Reviewed in the United States on October 19, 2024
My first use for this power meter will be to investigate the consumption of my window mounted heat pump air conditioner. It was very easy to enter my current electricity rate, although I was only able to enter a single digit of the kilowatt hour cost. Maybe I'm doing it wrong. My rate is basically 30 cents per kilowatt hour so a single digit was not a problem for me. I will update this review when I've had more experience using this device. So far it seems like a great value and I'm hoping to learn a lot about my power consumption.
Customer image
5.0 out of 5 stars Simple, cost-effective power tracker
Reviewed in the United States on October 19, 2024
My first use for this power meter will be to investigate the consumption of my window mounted heat pump air conditioner. It was very easy to enter my current electricity rate, although I was only able to enter a single digit of the kilowatt hour cost. Maybe I'm doing it wrong. My rate is basically 30 cents per kilowatt hour so a single digit was not a problem for me. I will update this review when I've had more experience using this device. So far it seems like a great value and I'm hoping to learn a lot about my power consumption.
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Reviewed in the United States on October 21, 2024
Read out a bit dim. Measurements a bit off but close enough. Good so far.
Reviewed in the United States on October 27, 2024
I like the big display, I like the fact it can measure the high water mark of power (watts) because I need to find the max output of my lathe motor- it was supposed to be 3/4 HP but I find from this meter it would never draw more than 255w so it was just a 1/3 HP motor with a fake 3/4 HP sticker.

This is better than my Kill A Watt because it remembers even when power is removed.
Reviewed in the United States on September 16, 2024
Wish it had come with instruction for those of us not so familiar with electrical specifics.
Reviewed in the United States on July 16, 2024
It works fine but the picture depicted high power appliances while in fact it can’t go beyond 1800 watts, that’s why I ended up returning it.
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Top reviews from other countries

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Fabrice Q.
5.0 out of 5 stars Reliable power usage monitor with detailed modes for safety and efficiency
Reviewed in Canada on October 6, 2024
I've been using the kuman KW47-US Electricity Usage Monitor on and off for 4 years, and it has been a solid, reliable tool for tracking power consumption across various devices. The different modes provide a wide range of information, from basic power consumption to more specific data like voltage, frequency, and power factor.
I primarily use this device to ensure my outlets aren’t overloaded, and it's been great for monitoring how component changes affect power consumption in my setup. If you’re looking to keep your system safe and efficient, this monitor is an affordable and effective choice.
SerPJF69
5.0 out of 5 stars Excelente Monitor de consumo electrico
Reviewed in Mexico on December 21, 2022
Fácil de manejar, fácil lectura
Zeb
5.0 out of 5 stars Works good
Reviewed in Canada on April 6, 2024
Works as it should. No concerns.
ilovetech007
4.0 out of 5 stars good, needs improvements
Reviewed in Canada on March 13, 2024
works so far, without manual, can still use it like i wanted to. The only thing i wish i could do was add time and time of use rates. And resetting doesn't reset the rates, just the electrical usage data.

What works so far, is i can see how much electricity i use on a device. The problem is, i also have to adjust it based on time, due to my area adjusts costs based on the time of day. If this could be included, and rates aren't just wiped out everytime you press reset, as rates done change, it would save a lot of time. Also, time of use would help really check the cost of everything. I do get that some people do not want this feature. But having it as an option would be great, and those who dont need can just turn it off.
tipex
5.0 out of 5 stars Love it.
Reviewed in Canada on December 8, 2024
Helped me diagnose that one line in the wall does not handle 15 A. At only 11A it trips the breaker.