The 10 Best Electricity Usage Monitors

Updated April 30, 2018 by Tina Morna Freitas

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We spent 46 hours on research, videography, and editing, to review the top choices for this wiki. If you know your watts from your amps and want to monitor and control the electricity consumption in your home or office, check out these usage meters. Some units will give you all the data you need for an energy audit of individual devices while others measure your whole house or business, so you can keep your power bill as low as possible and reduce your carbon footprint. When users buy our independently chosen editorial picks, we may earn commissions to support our work. Skip to the best electricity usage monitor on Amazon.

10. Excelvan HP1101

The Excelvan HP1101 is perfect if you're on a budget. All you have to do is plug it into the wall outlet and then use it with any appliance to get fast results. It can measure a variety of parameters, including kWh, amps, voltage and more.
  • backed by a one-year warranty
  • poorly translated instructions
  • lcd is a bit dim
Brand Excelvan
Model pending
Weight 6.4 ounces
Rating 3.7 / 5.0

9. Efergy E2

The Efergy E2 provides you with usage updates every 10 seconds, so you can see if it suddenly spikes and figure out the cause. It also displays a daily average of power consumption, which makes it easier to spot trends and adjust things as necessary.
  • measures whole house
  • clamps quickly onto breaker cables
  • software is very basic
Brand Efergy
Model e2C 002
Weight 1.7 pounds
Rating 3.8 / 5.0

8. Tacklife EM02 Classic

Even technophobes will find the Tacklife EM02 Classic simple to operate, with four large buttons that are clearly labeled to select the measuring mode you prefer and other settings. It conveniently retains the most recent reading even if it loses power.
  • flame retardant frame
  • overload protection
  • does not provide a lot of data
Model pending
Weight 10.4 ounces
Rating 3.6 / 5.0

6. Ensupra PM002

The Ensupra PM002 will help you save money all around. It costs less than $20, making it a very affordable option, and accurately tracks energy consumption of a single device. In addition, it also shows how much CO2 was produced to create the amount of energy used.
  • shows kw hours and monetary cost
  • can set single and dual rate tariffs
  • short backup battery life
Brand Ensupra
Model EPMonitor2
Weight 0.3 ounces
Rating 4.3 / 5.0

5. Blue Line Innovations Power Cost

Keep tabs on your utility expenditures with the Blue Line Innovations Power Cost. It gathers its data directly from your home's power meter, so there is no question as to its accuracy. By alerting you to current usage, it makes it easier to cut back when possible.
  • takes less than 30 minutes to set up
  • sends data to receiver wirelessly
  • not compatible with all meters
Brand Blue Line Innovations
Model BLI-28000ER
Weight 1.5 pounds
Rating 4.3 / 5.0

4. Eyedro Wireless

The Eyedro Wireless allows you to monitor the cost of multiple appliances and get detailed readings and kilowatt clarity at any time via their free cloud-based web service. It is also available in a wired model to fit with any type of internet connection.
  • sensors install at the breakers
  • helps uncover your energy habits
  • app responsiveness is inconsistent
Brand Eyedro
Model EHWEM1
Weight 1.5 pounds
Rating 4.1 / 5.0

3. P3 International Kill A Watt

The P3 International Kill A Watt counts consumption by the kilowatt-hour, just as the local utility company does, making it extremely precise. At the touch of just a few buttons, you can calculate a device's daily, monthly, or yearly energy costs.
  • retains settings when unplugged
  • large easy to read lcd
  • blocks both plugs in wall socket
Brand P3
Model P4460
Weight 5 ounces
Rating 4.8 / 5.0

2. Etekcity Voltson

When you plug an appliance into the Etekcity Voltson you can track its power usage, plus you gain the ability to turn it on and off with your smartphone. The outlets connect seamlessly with your existing WiFi and pair easily with Alexa and Goggle Assistant.
  • timer and program scheduling
  • voice control option
  • low cost per unit
Brand Etekcity
Model pending
Weight 1.2 pounds
Rating 4.7 / 5.0

1. Sense Home Energy

The Sense Home Energy is a complete system that needs to be installed by a licensed electrician directly into your electrical panel. This device provides you with data on your whole energy profile, as well as real time usage of individual appliances such as your sump pump.
  • integrates with alexa
  • app stores usage data
  • set custom notifications
Brand Sense
Model 12000
Weight 2.1 pounds
Rating 4.8 / 5.0

How Electricity Usage Monitors Work

Electricity usage monitors are a smart purchase for anyone who is looking to cut back on power consumption, whether for environmental or monetary purposes. These monitors can help one identify which devices are using up the most power. They also display the consumption in the same measurements the electricity company does, making it easy to predict the cost of future bill.

If using a lot of power is simply not an option, many models allow the user to set a kilowatt limit. When a device is getting near that limit, the monitor sounds an alarm so people in the house know to turn it off. Electricity usage monitors can show useful information like the total power consumed by a device per day, keeping track in real time, and resetting every 24 hours.

Many monitors can connect to several devices around your home, letting you navigate the control screen, checking on each one individually. People who travel a lot appreciate units that can be used remotely. Bluetooth compatible monitors not only allow the user to check on their in-home power use when they’re away, but also to turn on devices remotely.

Many monitors plug directly into a wall socket, so a person can easily use these in their home or office. Some let the user plug a device directly into them, to get an immediate, real-time read on that item’s power consumption. Advanced models have cloud computing technology that lets a person check on their home’s power consumption from any Internet-connected device, and save data for the user so they can track their habits.

Top Energy Wasting Habits

In addition to using an electricity monitor, there are a number of other habits one can adopt to conserve energy in their home. There are several things that can be done differently around the kitchen to save power, like deciding what to eat before opening the refrigerator. People spend an average of 10.4 hours per year staring into their open refrigerator, wasting the electricity used to turn the light on, and to cool it back down when shut. And the refrigerator isn’t even the most expensive appliance in the home.

Using the oven is uncomfortable enough during the summer months, but it can also be costly. Air conditioner units work overtime when an oven is turned on, to compensate for the added heat in the room, so baking on hot days is irresponsible. Many often leave the oven preheating for longer than necessary while they work on other food preparation tasks.

Fans should only be on in rooms occupied by humans. Fans do not cool down an empty room. They simply cool down the object they are facing and if that’s a wall, that’s a waste of energy. Failing to set a thermostat is financially and electrically neglectful. Most people who turn on their air conditioner with the idea of turning it off when the home feels cool enough often forget to shut it off. A thermostat can prevent hours of wasted air conditioning power.

In the entertainment room, items like DVD players, speakers and cable boxes do not need to be left on all day. Most people only use these items for a few hours at night, and yet they leave them plugged in all day while they’re at work, and all night while they’re asleep. Many of these devices drain small amounts of power even when not in operation. It's known as a vampire drain and it happens in many common household electronics. Falling asleep in front of the television can also be a major electricity-waster, especially if it’s a person’s nightly habit.

The Most Energy Efficient Cities

Some cities make energy efficiency a top priority, and doing so can improve their economy and their environment. Considering that cities consume 75 percent of the world’s natural resources, it’s imperative that officials consider ways to cut back on power consumption.

Reykjavik, Iceland gets all of its heat, electricity, and hot water from renewable hydropower and geothermal plants. In the mid-2000s, the city replaced most of its public transportation with hydrogen-fueled buses, which only emit pure water into the atmosphere.

Portland, Oregon replaced its old streetlights with LED models that consume less energy. The city has always been environmentally conscious: in the 1970s, it removed a six-lane highway to make room for a waterfront park. Portland’s power-conscious citizens use bicycles as one of their main forms of transportation as well.

Vancouver, Canada is another city that boasts clean air. It has the lowest per capita carbon emissions of any major city in North America and receives 90 percent of its energy from hydroelectric power. Vancouver gets its other 10 percent of energy from renewable sources like wind, solar, and wave power.

Oslo, Norway, with its distinct four season weather, uses intelligent lights on their streets. These lights adjust their electrical output depending on the weather and traffic conditions. The city also powers most of its heating systems with biomethane, a renewable energy source retrieved from their waste product. Scandinavia is home to another highly energy efficient city, Copenhagen, Denmark. Over one-third of the city’s residents ride bicycles every day, and the city grows several rooftop gardens, which help insulate buildings.

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Last updated on April 30, 2018 by Tina Morna Freitas

Tina Morna Freitas is a writer who lives in Chicago with her family and two cats. She enjoys making and sipping margaritas and aspires to be a crazy cat lady once all the children are grown.

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