Top 10 Best iotawatt in 2026

Last Updated - 6/22/2026

🏆Best Choice

EMPORIA

Emporia Vue 3 Home Energy Monitor - Smart Home Automation Module and Real Time Electricity Usage Monitor, Power Consumption Meter, Solar and Net Metering for UL Certified Safe Energy Monitoring

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•SAFETY YOU CAN TRUST WITH UL CERTIFICATION: With Emporia Energy, your home energy monitoring is safe, reliable, and certified. The Emporia Vue is UL Listed, meaning it has met rigorous safety standards for electrical products in the U.S. and Canada. This certification ensures that every component has been thoroughly tested to prevent hazards, such as overheating, short-circuiting, or fire, offering you peace of mind as you manage your home’s energy consumption.
•INSTALLS IN CIRCUIT PANEL of most homes with clamp-on sensors. Supports Single phase, Single-split phase, and 2-wire systems. 3-wire systems; 3-phase, 4-wire Wye systems with earthed (TN or TT) neutral (no-Delta) are supported with an additional 200A sensor (sold separately).
•24/7 ENERGY MANAGEMENT AND MONITORING: Automate, manage and control your home's real power anywhere, anytime to prevent costly repairs, conserve energy, and save costs. Monitor solar / net metering. PROTECTED BY A 1-YEAR WARRANTY.
•LOWER YOUR ELECTRIC BILL: Configure settings in the Emporia Energy App to automate energy management for time of use, peak demand, excess solar, and rewards programs. You can even see live reporting and invaluable savings opportunities instantly. Gauge real-time spending and get actionable notifications and automated energy management to help you reduce costs.
•REAL-TIME ENERGY DATA: REQUIRES 2.4 GHz WIFI WITH AN INTERNET CONNECTION to monitor energy use with iPhone / Android / Web app. Vue sensors collect energy data and are accurate from ±2%. The Vue is UL and CE Listed for your safety. 1 second data is only available in the app (when actively open) and retained 3 hours. Minute and hour data are retained in the cloud. 1 minute data is retained 7 days, 1 hour data is retained indefinitely. Export cloud data whenever you want in the app.
•APPLIANCE MONITORING WITHOUT GUESSWORK: Comes with sixteen branch (50A) sensors to accurately monitor your critical loads like air conditioner, furnace, water heater, washer, dryer, range, etc. New and improved screw terminals / ports allow CT wires to be trimmed to reduce panel clutter.

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$199.99

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KILL A WATT

Kill A Watt Connect P4498 Electricity Usage Monitor Power Consumption Meter with Two Piece Housing and 35 Inch Cord for Easy Use

9.7

ChoiceComparer.com Score

9.7

/ 10

Outstanding

Main highlights

•35 inch cable allows you to place plug in out of the way places while the display remains easy to read
•See the cost of an appliance by HOUR DAY WEEK MONTH YEAR
•Displays the following measurements Volts Current Watts Frequency Power Factor VA
•Measurements are retained in memory during power interruptions
•Accurate and easy to use

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$39.89

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Fusion Energy

Smart Home Energy Monitor with 16 50A Circuit Level Sensors, Measure Power Usage in Real-Time, History with App (16 50A Circuit Level Sensors) - Compatible with Home Assistant

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•⚡ EASY INSTALLATION: Installs in circuit panel of most homes with clamp-on sensors. Supports single-phase up to 240VAC line-neutral; single, split-phase 120/240VAC; and three-phase up to 415Y/240VAC (no Delta). The branch lines can automatically match different phases and have no restrictions in terms of quantity and voltage.Panels with access only to busbars will need flexible sensors available from SEM-Meter.
•⚡ ENERGY MONITORING ANYTIME, ANYWHERE: Monitor your home's real power anywhere, anytime to prevent costly repairs, conserve energy, and save costs. Monitor solar / net metering. Light commercial 3 phase option available as a separate bundle. Protected by a 1-year warranty.
•⚡ VARIOUS ELECTRICAL APPLIANCE MONITORING: Comes with 16 50A sensors to accurately monitor your air conditioner, furnace, water heater, washer, dryer, range, etc.
•⚡ LOWER YOUR ELECTRIC BILL: SEM-Meter measures real-time spending and gets actionable notifications to understand where savings can be made, both to lower your electric bill and to conserve energy and protect the planet’s resources. Be an environmentalist.
•⚡ REAL-TIME ENERGY DATA: Connect SEM-Meter device via 2.4GHz WiFi to monitor energy usage, with an accuracy range of 1%. View usage in real time through Android/Apple software. Statistics of power usage in now/day/week/month/year format: the validity period of hourly exported data is 90 days, and the exported data of day/month/year data is permanent, available at any time Export from application.
•⚡ Super Privacy Mode ! run without our cloud ,without our app!! use your own MQTT server only!! run in LAN without internet access !!! (HomeAssistant with MQTT required.)

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$129.99

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Shelly

Shelly Pro 3EM (120A) | Wi-Fi & LAN, 3-Phase Smart Energy Meter | 2-Way Consumption | Home Automation | Bluetooth Gateway | Compatible with Alexa & Google Home | No Hub Required | Solar Panels

9.4

ChoiceComparer.com Score

9.4

/ 10

Excellent

Main highlights

•Shelly Pro 3EM is a Wi-Fi-operated, DIN-mountable 3-phase energy meter with Wi-Fi and LAN connectivity. With an active energy measurement accuracy of 1%, it allows precise monitoring of energy consumption for home appliances, electric circuits, and office equipment individually. The package includes three 120A Current Transformers for enhanced measurement. Additionally, it functions as a Bluetooth gateway, expanding connectivity for smart home automation.
•Monitor your home, office, or factory and avoid additional expenses or drops in voltage that can damage your appliances and devices. Shelly Pro 3EM can calculate 2-way consumption: produced and used energy for each of the three phases | Industry grade security- the device can have direct connections to your cloud infrastructure, reducing the cost of deploying complex networks and VPNs.;
•Solar Panels Monitoring and Control - Keep track of how much energy your solar panels or wind turbines are generating and save effortlessly. Access real-time information about the efficiency of your system and historical data for up to 60 days.
•Shelly Customer Service - Shelly is one of the fastest-growing IoT brands in the world with devices, providing solutions for the automation of private homes, buildings and businesses. We provide our customers with professional support and a 5 years device warranty.
•Shelly Smart Control App will help you control your Shelly devices remotely and will send notifications for all automated events in your home. You can easily configure devices and manage their settings individually, or you can create personalized scenes by combining Shelly devices to trigger certain actions in your home automation.

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$128.99

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Refoss

Smart Home Energy Monitor Supports Home Assistant, Real-Time Accurate Energy Consumption Tracking, Electricity Usage Monitor with 16x60A Circuit Sensors, 36-Month History, Solar Metering, 2.4G

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•✨NEW✨ Feature Release (25.07.30): 1.Merge channels; 2.Export hourly-level energy data; 3.Manage Peak Demand; 4.Access the new energy statistics page; 5.Invert CT readings directly via Device Settings → Circuit Factor (no physical flipping needed!). Update to the latest Refoss app and firmware to enable all features.
•Smart Home Energy Monitor: Supports 2 main circuit sensors (up to 200A each) and 16 branch circuit sensors (up to 60A each)—perfect for heavy-duty electric appliances such as heating pump, pool pump, dryer or air conditioners. Compatible with single-phase 2-wire systems, single-split phase 3-wire systems, and 3-phase 4-wire Wye systems with earthed (TN or TT) neutral (no Delta). Easily installs in most home circuit panels and includes a 2-year warranty. Attention: Handle the current transformers with care to avoid damage.
•24/7 Energy Monitoring: With the Refoss app, you can track your home’s energy usage anytime, anywhere. Easily monitor the power, current, voltage, and power factor of major appliances like air conditioners, stoves, and water heaters. Quickly identify which devices are running efficiently and which ones might be wasting electricity. According to statistics, many users save an average of 10%-20% on their energy bills by optimizing appliance usage.
•Zero Feed In Automation: The EM16 is a smart meter designed for solar owners, linking with Home Assistant to automate your zero feed-in strategy. Ideal for homes with solar panels, it detects solar surplus (like midday sun peaks) and automatically powers high-energy appliances - such as activating your washing machine, EV charger, or water heater - to consume excess solar energy onsite. This prevents low-value electricity feed-ins to the grid, maximizing your solar investment returns and slashing utility bills.
•Comprehensive Energy Data: The power monitor provides 98% accuracy and stores up to 3 years of detailed electricity usage data. With clear minute, hour, day, month, and year consumption and cost charts, you can easily understand your energy use. Ideal for homeowners adjusting appliance usage to save on bills or businesses tracking long-term energy savings and emission reductions. Historical data can also be exported for further analysis, making every electricity expense transparent.
•Smart Consumption Alerts: You can set personalized usage targets for each circuit. Once the system detects an unusual energy spike—such as a sudden increase in power consumption by an appliance that exceeds the normal range—you will immediately receive a detailed alert notification. This allows you to take prompt action, such as checking if there is a malfunction with the device or adjusting your usage habits, thereby optimizing appliance usage across different times of the day.
•Compatible with Home Assistant: EM16 Wi-Fi Energy Monitor is now compatible with Home Assistant! Simply update the firmware in the Refoss app to seamlessly integrate your energy management system with your smart home platform, enabling centralized control and automation. Additionally, all data is stored locally, ensuring your privacy is protected without cloud processing. API is not supported.

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$161.49

$239.99

-33%

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Sense

Sense Energy Monitor - Track Electricity Usage in Real Time and Save Money - Meets Rigorous ETL/Intertek Safety Standards

9.1

ChoiceComparer.com Score

9.1

/ 10

Excellent

Main highlights

•SENSE SAVES: Sense saves you energy and money by providing insights into your home's energy use and activity. NOW SUPPORTING TIME-OF-USE RATE PLANS.
•SEE WHAT'S UP. KNOW WHAT'S ON: Track how much electricity you're using, what time your kids got home, or when someone leaves the basement light on. Sense identifies patterns in your energy use to help your family be more efficient, informed, and secure.
•MONITOR YOUR HOME'S ENERGY USE FROM ANYWHERE: Real-time data through our iOS, Android, and web apps.
•AVOID DISASTER: Set custom notifications for critical devices, like your sump pump, well pump, or flat iron.
•MEETS RIGOROUS SAFETY STANDARDS: Sense's components and system have been designed and ETL/Intertek certified for installation and operation inside the electrical panel. Sense is not currently available or compatible outside the United States and Canada.

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$299.00

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Hosyond

AC 80-260V 100A LCD Digital Display Multi-Function Power Monitor Voltage Current Frequency Power Factor Energy Meter Ammeter Voltmeter with Split Core Current Transformer

8.9

ChoiceComparer.com Score

8.9

/ 10

Great

Main highlights

•The electric energy meter can simultaneously monitor and display voltage, current, active energy, electric energy, frequency and power factor. The use of split current transformers makes installation more convenient.
•Large-screen LCD digital display with a full viewing angle of 180°. One-button control: backlight on/off, reset energy, preset power alarm limits.
•Overload alarm function, when the preset value is exceeded, the backlight and power supply will flash at the same time to give an alarm. You can preset power limits yourself.
•Automatic data storage function: when the power supply is suddenly cut off, the last test data will be automatically stored. Don't worry about data loss due to sudden power failure.
•Wide range of application scenarios, suitable for power monitoring and management in household, commercial and industrial fields.

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$16.99

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EdgeAnt

WIFi Energy Monitor with 3 * 80A Clamp, Smart Home Power Monitor Track Electricity in Real Time,WIFi Meter Solar/Net Metering, Home Energy Automation and Control

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•Appliance Monitoring: Equipped with three 80A sensors, this device accurately monitors appliances like air conditioners, furnaces, water heaters, washers, and dryers. It supports integration with other Tuya devices.
•Energy Monitoring: Monitor real-time power consumption from anywhere to prevent costly repairs. Monitor real-time power Consumption, Voltag, current, Power factor, help you manage and control your home's real power anywhere conserve energy, and reduce expenses.
•Real-Time Data: Requires 2.4 GHz WiFi with internet access for phone app monitoring. With 3*80A current transformer CT clamp sensors with an accuracy of ±2%.Supports bidirectional measurement data. If the clamp-on sensors are installed opposite to the current direction, the data will display negative value
•Profesional Sensors: Installs directly into most home circuit panels using clamp-on sensors. Compatible with single-phase, single-split phase, and 2-wire systems. Also supports 3-wire systems, 3-phase, 4-wire Wye systems neutral (excluding Delta) with an optional 80A sensor.
•Safety First: Installation and servicing should only be done by qualified personnel. Avoid touching the device terminals during testing and ensure all power is switched off before installation to ensure safety.
•User-Friendly Design: Lightweight and easy to install, the EPMC321-80A Power Clamp helps monitor electricity usage by attaching the clamp to the power cable. Use the 'SmartLife' app for setup.

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$79.99

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AVHzY

AC WiFi Watt Meter, Plug-in US Socket Power Meter, Electricity bill statistics,temperature control,Backlit Large Color Display, Overload Protection,Voltage AMP Tester, Electrical Energy Monitor Timer

8.6

ChoiceComparer.com Score

8.6

/ 10

Good

Main highlights

•【Screen Type】2.4inch TFT-LCD HD Display Panel Graphic 240´RGB´320 Dot-matrix Large screen measurement digital display function AC85-265V Internal Include Relay: 16A Power: 120V 1920W, 230V 3680W
•【WIFI connection】Date function: month/day tuya app or smart life app, just say what you want to do and it will happen right away.
•【Product function】1.Remote control 2.Timer function Socket 3.Countdown function
•【Protection function】1.Over current Protection 2.Over voltage protection 3.Over Power protection
•【Electricity bill setting】Set the electricity unit price function/accumulate electricity bills

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$37.99

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P3 P4400 Kill A Watt Electricity Usage Monitor

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•Choose from the Kill-a-Watt's four settings to monitor your electrical usage
•Monitor your electrical usage by day, week, month, or year
•Features easy-to-read screen
•Electricity usage monitor connects to appliances and assesses efficiency
•Large LCD display counts consumption by the kilowatt-hour
•Calculates electricity expenses by the day, week, month, or year
•Displays volts, amps, and wattage within 0.2 - 2.0percent accuracy
•Compatible with inverters; designed for use with AC 115-volt appliances

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$30.06

$39.95

-25%

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