The best home electricity monitors make it easier to see where power goes, from whole-home demand to individual circuits and plugged-in appliances. My best overall pick is the Emporia Vue 3 for its 16-circuit coverage; the Siemens Inhab stands out for combining circuit and main sensors, while the Emporia Vue Bundle adds smart plugs for appliance-level tracking. The main choice is between panel-wide visibility, smart-home integration, and simple plug-in monitoring that avoids electrical-panel installation. Keep reading for how the 15 options compare and which type fits your setup.
Get the little things that make your day delivered free with Prime
- Fast, free delivery on millions of items
- Prime Video, Amazon Music and more included
- Member-only deals all year
Key Takeaways
- Panel coverage separates the leading whole-home picks: the Emporia Vue 3, Refoss, and 16-sensor models are aimed at households that want to track several circuits, while smaller sensor counts limit how much can be isolated.
- More sensors do not automatically mean better fit: an 18-circuit model may help in a larger panel, but buyers should check panel compatibility and installation needs before prioritizing capacity.
- Smart-home support is a real dividing line: Home Assistant-focused options suit buyers who want to connect energy data to automations, while simpler monitors may be easier for basic usage checks.
- Plug-in meters solve a different problem: the watt meters and MECHEER two-pack can identify the draw of individual appliances without monitoring a home’s entire electrical panel.
- Specialized needs change the ranking: the Eyedro three-phase meter targets compatible commercial or specialized electrical systems, rather than serving as a default choice for typical household panels.
| Smart Home Energy Monitor with 16 Circuit Sensors |  | Best for Broad Circuit Coverage | Circuit sensors: 16 × 50A | Voltage support: Up to 240VAC single-phase or split-phase; up to 415Y/240VAC three-phase; no Delta | Connectivity: 2.4 GHz Wi-Fi | VIEW LATEST PRICE | See Our Full Breakdown |
| Sungrass eMonHub Home Energy Monitor for Home Assistant |  | Best for Home Assistant and Solar Systems | Circuits monitored: 10 per unit | Connectivity: Wi-Fi and Ethernet | Data storage: Local network storage | VIEW LATEST PRICE | See Our Full Breakdown |
| Refoss Smart Home Energy Monitor with 16 Circuit Sensors |  | Best for Long-Term Local Data | Model: EM16P | Main sensors: 2, up to 200A | Branch sensors: 16, up to 60A each | VIEW LATEST PRICE | See Our Full Breakdown |
| Eyedro Smart Home Energy Monitor with 200A Sensors, WiFi and Ethernet |  | Best for Straightforward Whole-Home Monitoring | Current sensor capacity: 200A | Sensors included: 2 directional current sensors | Connectivity: 2.4 GHz Wi-Fi or Ethernet | VIEW LATEST PRICE | See Our Full Breakdown |
| Meross Smart Home Energy Monitor with Home Assistant Support |  | Best for Feature-Rich Local Monitoring | Model: EM16 | Main circuit capacity: 2 circuits, 200A | Branch circuit capacity: 16 circuits, 60A | VIEW LATEST PRICE | See Our Full Breakdown |
| Meross Smart Home Energy Monitor, 18-Circuit, with Home Assistant Support | | Best for Home Assistant Users | Circuit monitoring: 2 main circuits (200A) and 16 branch circuits (60A) | Measurement accuracy: ±2% | Data storage: Up to 5 years | VIEW LATEST PRICE | See Our Full Breakdown |
| Plug-In Watt Meter and Home Energy Monitor |  | Best for Checking Individual Appliances | Power source: Corded electric | Minimum operating voltage: 120 volts | Compatible devices: Appliances that fit a standard US socket | VIEW LATEST PRICE | See Our Full Breakdown |
| Refoss EM16P Smart Home Energy Monitor |  | Best for Local Data and Integrations | Main circuit sensors: 2, rated 2–200A each | Branch circuit sensors: 16, rated 1–60A each | Accuracy: ±1%; ±2% at low current | VIEW LATEST PRICE | See Our Full Breakdown |
| Eyedro 3-Phase Energy Meter, 200A/600V, Wi-Fi and Ethernet |  | Best for Three-Phase Systems | Phase: 3-phase | Voltage options: 600V Delta, 480V/277V Wye, 208V/120V, and other configurations | Included current sensors: 3 × 200A split-core CTs | VIEW LATEST PRICE | See Our Full Breakdown |
| Siemens Inhab Smart Home Energy Monitor with Circuit and Main Sensors |  | Best for App-Based Energy Management | Main sensors: 2 × 200A CTs | Circuit sensors: 16 × 50A CTs | Connectivity: Wi-Fi and mobile app | VIEW LATEST PRICE | See Our Full Breakdown |
| Plug-In Watt Meter and Home Electricity Usage Monitor |  | Best for Simple Appliance Checks | Display: 2.36 × 1.85-inch backlit LCD | Display modes: 7 | Measurements: Power, energy, voltage, current, frequency, power factor, estimated cost, minimum and maximum power | VIEW LATEST PRICE | See Our Full Breakdown |
| Emporia Vue 3 Home Energy Monitor with 16 Circuit Sensors |  | Best for Circuit-by-Circuit Tracking | Model: EMV3A-2P-16 | Circuit sensors: 16 branch sensors, 50A | Accuracy: ±2% | VIEW LATEST PRICE | See Our Full Breakdown |
| MECHEER JK-PM07-2P-US Power Meter Plug, 2-Pack |  | Best Value for Monitoring Two Appliances | Model: JK-PM07-2P-US | Quantity: 2-pack | Display modes: 8 | VIEW LATEST PRICE | See Our Full Breakdown |
| Emporia Vue Energy Monitor Bundle with 16 Sensors and 4 Smart Plugs |  | Best Bundle for Whole-Home and Outlet Monitoring | Included circuit sensors: 16 | Included smart plugs: 4 | Tracking: Whole-home and circuit monitoring with second-by-second energy tracking | VIEW LATEST PRICE | See Our Full Breakdown |
| 10-Circuit Smart Home Energy Monitor with AI Analysis and Home Assistant Support |  | Best for Home Assistant and Local-System Integrations | Model: eMonHub-HNA0A | Circuit monitoring channels: 10 | Metering: Bidirectional | VIEW LATEST PRICE | See Our Full Breakdown |
| home electricity monitor | Dimensions | Connectivity |
|---|---|---|
| Smart Home Energy Monitor with | 3.1 × 1.2 × 4.18 inches | 2.4 GHz Wi-Fi |
| Sungrass eMonHub Home Energy M | 4.73 × 3.15 × 1.22 inches | Wi-Fi and Ethernet |
| Refoss Smart Home Energy Monit | — | — |
| Eyedro Smart Home Energy Monit | 8 × 8 × 3 inches | 2.4 GHz Wi-Fi or Ethernet |
| Meross Smart Home Energy Monit | — | — |
| Meross Smart Home Energy Monit | — | Open API and web control |
| Plug-In Watt Meter and Home En | 5.5 × 3.5 × 2.5 inches | — |
| Refoss EM16P Smart Home Energy | 4.5 × 3.5 × 1.1 inches | — |
| Eyedro 3-Phase Energy Meter | 10 × 7 × 3 inches | 2.4 GHz Wi-Fi or Ethernet |
| Siemens Inhab Smart Home Energ | 1.1 × 5.71 × 2.76 inches | Wi-Fi and mobile app |
| Plug-In Watt Meter and Home El | — | — |
| Emporia Vue 3 Home Energy Moni | 10 × 5 × 5 inches | 2.4 GHz Wi-Fi and internet connection |
| MECHEER JK-PM07-2P-US Power Me | 5.2 × 2.7 × 2.4 inches | — |
| Emporia Vue Energy Monitor Bun | — | — |
| 10-Circuit Smart Home Energy M | 4.73 × 3.15 × 1.22 inches | Wi-Fi and Ethernet |
More Details on Our Top Picks
Smart Home Energy Monitor with 16 Circuit Sensors
Sixteen included 50A sensors make this a strong fit for homeowners who want to trace usage across many individual circuits without adding sensors separately. It also estimates costs using configurable time-of-use rates, so its readings can help identify when household loads are driving bills. Compared with the Eyedro Smart Home Energy Monitor, which focuses on whole-home, solar, or net-metering readings, this model offers much more branch-circuit detail. It also supports local MQTT with Home Assistant, rather than relying only on cloud viewing. The tradeoff is installation: you need access to a compatible electrical panel, and some busbar-only layouts call for separately available flexible sensors. It supports several common system types, but not three-phase Delta.
Pros:- Includes 16 clamp-on sensors for circuit-level monitoring
- Configurable rate schedules turn usage data into estimated electricity costs
- Local MQTT support enables Home Assistant integration
- Supports single-phase, split-phase, and specified three-phase systems
Cons:- Installation requires access to a compatible electrical panel
- Three-phase Delta systems are unsupported
- Busbar-only access may require separately available flexible sensors
Best for: Homeowners with a compatible panel who want circuit-by-circuit usage, cost estimates, and Home Assistant access across many loads.
Not ideal for: Homes with three-phase Delta power or panels where the included clamp sensors cannot be fitted and the owner does not want to source flexible sensors.
- Circuit sensors:16 × 50A
- Voltage support:Up to 240VAC single-phase or split-phase; up to 415Y/240VAC three-phase; no Delta
- Connectivity:2.4 GHz Wi-Fi
- Accuracy:1%
- Data history:Hourly exports retained for 90 days; day, month, and year exports permanent
- Smart home integration:Home Assistant via MQTT
- Dimensions:3.1 × 1.2 × 4.18 inches
- Warranty:1 year
Our verdict“Choose this monitor if broad branch-circuit coverage and local Home Assistant integration matter more than simple whole-home readings.”
Sungrass eMonHub Home Energy Monitor for Home Assistant
The eMonHub puts Home Assistant and local data at the center of its design, making it a better match for automation-minded households than a cloud-first monitor. Its bidirectional metering can track energy moving to or from solar, vehicle-to-grid, and battery systems, while Wi-Fi and Ethernet give buyers a choice of network connection. Compared with the Smart Home Energy Monitor with 16 Circuit Sensors, this unit monitors 10 circuits rather than 16, but its support for Ethernet and bidirectional energy flows may matter more to homes with distributed generation. The listed information does not specify accuracy, retention duration, or detailed electrical compatibility, so buyers should verify those points before installation. Like other panel-based systems, it also requires access to the circuit panel.
Pros:- Integrates with Home Assistant for real-time metrics and automations
- Bidirectional monitoring supports solar, V2G, and battery setups
- Stores data locally on the network
- Offers both Wi-Fi and Ethernet connectivity
Cons:- Monitors 10 circuits per unit, fewer than 16-circuit alternatives
- Installation requires access to a circuit panel
- Accuracy and data-retention details are not specified in the provided product data
Best for: Home Assistant users with solar, battery, or V2G equipment who want local monitoring and the option of a wired network connection.
Not ideal for: Buyers who need 16-circuit coverage or clear published accuracy, data-retention, and electrical-system specifications before purchase.
- Circuits monitored:10 per unit
- Connectivity:Wi-Fi and Ethernet
- Data storage:Local network storage
- Energy flow support:Bidirectional metering for solar, V2G, and battery systems
- Dimensions:4.73 × 3.15 × 1.22 inches
- Weight:2.8 pounds
- Model:eMonHub-HNA0A-HA
- Included components:Energy monitor, current transformers, wire harness, Wi-Fi antenna, and cable
Our verdict“Pick the eMonHub for local Home Assistant and bidirectional energy tracking, provided its 10-circuit capacity and undocumented technical details fit your needs.”
Refoss Smart Home Energy Monitor with 16 Circuit Sensors
Five years of daily data storage gives this Refoss model an advantage for owners who want to compare usage patterns over several seasons without leaning on a cloud service. It monitors two main circuits alongside up to 16 branch circuits, so buyers can see both household totals and individual loads. Its local web interface, Open API, MQTT, and WebSocket options make it more flexible for custom dashboards than the Eyedro monitor, whose history is accessed through MyEyedro cloud. Refoss also supports solar monitoring and alerts for unusual consumption. The tradeoff is a more technical setup: local integrations and remote access may take configuration, and the product data does not describe a subscription-free cloud service. As with the other panel monitors here, installation requires breaker-box access.
Pros:- Monitors two main circuits and up to 16 branch circuits
- Stores daily data for five years
- Offers local Web UI, Open API, MQTT, WebSocket, and Home Assistant support
- Supports solar monitoring and unusual-use alerts
Cons:- Installation requires access to the breaker box
- Remote features may require local network setup
- Supports three-phase 4-wire Wye, not Delta
Best for: Technically comfortable homeowners who want long-term local records, detailed circuit monitoring, and open integration options.
Not ideal for: Buyers seeking a simple plug-in setup, a clearly described cloud service, or monitoring for three-phase Delta systems.
- Model:EM16P
- Main sensors:2, up to 200A
- Branch sensors:16, up to 60A each
- Accuracy:±1%
- Supported systems:Single-phase, split-phase, and 3-phase 4-wire Wye
- Connectivity and integrations:Local Web UI, Open API, MQTT, WebSocket, and Home Assistant
- Data retention:Daily data stored for 5 years
- Warranty:2 years
- Certification:ETL certified
Our verdict“Choose the Refoss if long-term local records and open integrations outweigh the setup work and lack of a described cloud service.”
Eyedro Smart Home Energy Monitor with 200A Sensors, WiFi and Ethernet
Eyedro is the more focused pick for buyers who want to see whole-home electricity use or solar generation without wiring sensors across a long list of branch circuits. Its two directional 200A sensors can monitor grid energy, solar, or net metering, and the included MyEyedro cloud access has no subscription. Ethernet is a useful alternative when Wi-Fi coverage near the electrical equipment is unreliable. Compared with the Refoss Smart Home Energy Monitor, Eyedro gives up detailed 16-branch-circuit tracking and local open integrations in favor of a simpler whole-system view. Its main limitation matters for solar households: one unit cannot measure grid consumption and solar generation separately at the same time. That requires two units, adding hardware and installation work.
Pros:- Includes two directional 200A current sensors
- Measures real-time watts, amps, volts, and cost
- Works over 2.4 GHz Wi-Fi or Ethernet
- Includes MyEyedro cloud history without a subscription
Cons:- A single unit cannot monitor grid energy and solar generation separately at the same time
- Separate grid and solar readings require two units
- Does not provide the branch-circuit detail of 16-sensor monitors
Best for: Homeowners who want cloud-based whole-home or solar readings, prefer Ethernet as an option, and do not need individual branch-circuit data.
Not ideal for: Solar owners who need separate grid-use and generation readings from a single unit, or buyers who want circuit-by-circuit monitoring.
- Current sensor capacity:200A
- Sensors included:2 directional current sensors
- Connectivity:2.4 GHz Wi-Fi or Ethernet
- Cloud access:MyEyedro cloud, no subscription
- Power source:AC
- Dimensions:8 × 8 × 3 inches
- Weight:1.54 pounds
- Included components:Sensor module, 2 current sensors, 6VAC power adapter, Ethernet cable, and quick start guide
Our verdict“Pick Eyedro for accessible whole-home or solar monitoring, but choose a multi-circuit model if you need to pinpoint individual loads.”
Meross Smart Home Energy Monitor with Home Assistant Support
Meross pairs two 200A main sensors with 16 branch sensors, covering whole-home totals and many individual circuits in one panel-based system. Its claimed ±1% accuracy, alerts, exports, and up to five years of stored data give buyers useful tools for spotting sustained changes rather than just checking momentary demand. Compared with the Eyedro Smart Home Energy Monitor, this is the stronger choice for circuit-level diagnosis and local control; Eyedro is simpler when a cloud-based whole-home or solar view is enough. Meross also supports Home Assistant, an Open API, and web control without a subscription. That flexibility comes with installation and compatibility demands, and three-phase Delta systems are not supported. Buyers should confirm their electrical setup matches the specified US systems before purchasing.
Pros:- Monitors two main circuits and up to 16 branch circuits
- Provides local data, Home Assistant, Open API, and web control
- Includes usage alerts, exports, and up to five years of data storage
- ETL-certified and backed by a two-year manufacturer warranty
Cons:- Does not support Delta electrical systems
- Installation requires a compatible electrical system and panel access
- Circuit-level setup is more involved than a whole-home-only monitor
Best for: Homeowners with a compatible US electrical system who want main- and branch-circuit monitoring, local data, and Home Assistant controls.
Not ideal for: Homes with Delta wiring, buyers without safe access to a compatible panel, or anyone seeking a simple plug-in meter.
- Model:EM16
- Main circuit capacity:2 circuits, 200A
- Branch circuit capacity:16 circuits, 60A
- Measurement accuracy:±1%
- Data storage:Up to 5 years
- Compatibility:Home Assistant; specified US single-phase, split-phase, and 3-phase Wye systems
- Certifications:ETL-certified; compliant with UL 61010 testing standard
- Warranty:2 years
- Included sensors:2 × 200A current transformers and 16 × 60A current transformers
Our verdict“Choose Meross if you want extensive circuit coverage and local smart-home control, and your panel matches its supported US system types.”
Meross Smart Home Energy Monitor, 18-Circuit, with Home Assistant Support
The Meross EM16 is a strong fit for buyers who want whole-home readings and circuit-level detail without giving up a local smart-home setup. It tracks two main circuits and up to 16 branch circuits, while Home Assistant support, Open API access, and local storage give technically minded owners more control over their data than a cloud-centered monitor. Compared with the Siemens Inhab, Meross makes its Home Assistant and API support a clearer part of the offer; Siemens instead emphasizes app-based energy management features. Meross also stores up to five years of data and supports solar surplus detection, useful for reviewing patterns and coordinating solar use. The tradeoff is electrical-system fit: it does not support Delta systems, so buyers should check their panel type before choosing it. Installation also requires access to the circuit panel.
Pros:- Tracks two main circuits and up to 16 branch circuits
- Supports Home Assistant, Open API access, and solar surplus detection
- Stores up to five years of data and supports hourly report exports
- ETL-certified and backed by a two-year warranty
Cons:- Does not support Delta electrical systems
- Requires a compatible panel and installation at the circuit panel
Best for: Home Assistant users with a supported US electrical system who want main-panel and individual-circuit data, local access, and long-term history.
Not ideal for: Owners of Delta systems or buyers who want a plug-in monitor that requires no work at the electrical panel.
- Circuit monitoring:2 main circuits (200A) and 16 branch circuits (60A)
- Measurement accuracy:±2%
- Data storage:Up to 5 years
- Compatibility:Single-phase 2-wire, split-phase 3-wire, and 3-phase 4-wire Wye with earthed neutral; no Delta
- Integrations:Home Assistant
- Connectivity:Open API and web control
- Installation:Clamp-on
- Certification and warranty:ETL-certified; compliant with UL 61010 testing standard; 2-year warranty
Our verdict“Choose the Meross EM16 if local Home Assistant integration and broad circuit coverage matter more than compatibility with every electrical system.”
Plug-In Watt Meter and Home Energy Monitor
This plug-in watt meter answers a narrower question than panel monitors: how much electricity does one appliance use? Plug it into a standard US outlet, connect an appliance, and read power, energy, voltage, frequency, current, power factor, or cumulative cost across eight display modes. Its backlit LCD and retained settings make it more informative than a basic on/off smart plug, while the 1800 W overload warning adds a clear limit for high-draw devices. Unlike the Meross EM16 or Refoss EM16P, it needs no circuit-panel installation or smart-home setup. That simplicity is also its boundary: it only measures equipment connected through its socket, so it cannot map whole-home use or track hardwired circuits. The display backlight also shuts off after ten minutes without a button press.
Pros:- Displays power, energy, voltage, frequency, current, power factor, and cumulative cost
- Offers eight display modes on a backlit LCD
- Retains settings and cumulative data during power loss or unplugging
- Flashes an overload warning above 1800 W
Cons:- Measures only appliances connected to a standard US socket
- Does not provide whole-home or circuit-panel monitoring
- Backlight turns off automatically after ten minutes without a button press
Best for: Renters and homeowners who want to measure the consumption and running cost of a specific plug-in appliance without installing equipment at the electrical panel.
Not ideal for: Buyers seeking whole-home monitoring, circuit-by-circuit tracking, remote app access, or measurement of hardwired equipment.
- Power source:Corded electric
- Minimum operating voltage:120 volts
- Compatible devices:Appliances that fit a standard US socket
- Display modes:8
- Overload threshold:1800 W
- Memory:Retains settings and cumulative data during power loss or unplugging
- Dimensions:5.5 × 3.5 × 2.5 inches
- Material:ABS
Our verdict“Pick this meter for straightforward appliance-level measurements, but choose the Meross EM16 or Refoss EM16P for whole-home circuit visibility.”
Refoss EM16P Smart Home Energy Monitor
The Refoss EM16P suits owners who want extensive circuit coverage and several ways to reach their energy data without making cloud access the centerpiece. Alongside two main sensors and up to 16 branch sensors, it offers a local web interface, Open API, MQTT, and Home Assistant. That range gives it a more flexible integration profile than the Meross EM16, whose listed integration is Home Assistant, while both offer long-term storage and broad panel monitoring. Refoss also supports solar usage automation and exports up to five years of history, which can help users build their own dashboards or review past consumption. Its stated accuracy is ±1% under typical conditions, but falls to ±2% at low current. Like other panel monitors, it requires access to the electrical panel and is not a simple plug-in solution.
Pros:- Monitors two main circuits and up to 16 branch circuits
- Provides local web access, Open API, MQTT, and Home Assistant support
- Stores and exports up to five years of data
- Supports solar usage automation and real-time alerts
Cons:- Installation requires access to the home’s circuit panel
- Accuracy is ±2% at low current rather than the stated ±1%
Best for: Smart-home owners and technically confident households that want local energy access, MQTT or Home Assistant integration, and monitoring across many circuits.
Not ideal for: Renters, buyers unwilling to access the circuit panel, or anyone who needs the same stated accuracy at very low current.
- Main circuit sensors:2, rated 2–200A each
- Branch circuit sensors:16, rated 1–60A each
- Accuracy:±1%; ±2% at low current
- Connectivity and integrations:Wi-Fi, local web UI, Open API, MQTT, Home Assistant
- Data storage:Up to 5 years; exportable
- Certifications:ETL-certified; compliant with UL 61010
- Dimensions:4.5 × 3.5 × 1.1 inches
- Warranty:2 years
Our verdict“Choose the Refoss EM16P if you want a highly integrable local monitor with extensive circuit coverage and can work with its panel-installation requirement.”
Eyedro 3-Phase Energy Meter, 200A/600V, Wi-Fi and Ethernet
Where many home monitors focus on standard residential panels, this Eyedro 3-Phase Energy Meter is built for broader electrical configurations, including 600V Delta and several Wye options. Its three split-core sensors monitor real-time energy, power, current, voltage, and power factor, while Wi-Fi or Ethernet gives buyers a choice of connection. The MyEyedro platform adds history, reports, alerts, and bill projections without a subscription fee. Compared with the Meross EM16, which excludes Delta systems and tracks up to 16 branch circuits, this Eyedro is the more relevant fit for three-phase monitoring, but the provided product details do not list individual branch-circuit tracking. Solar generation and net-metering scenarios are supported, though a net-metering breakdown requires two units. Buyers outside North America should also account for the separately sold European adapter.
Pros:- Supports three-phase configurations including 600V Delta and multiple Wye options
- Includes three 200A split-core current sensors
- Connects through 2.4 GHz Wi-Fi or Ethernet
- Provides cloud history, reports, alerts, and bill projections without a subscription fee
Cons:- Net-metering breakdown requires two EB6-EW-E3 units
- European Type C power adapter is sold separately
- Product details do not specify individual branch-circuit monitoring
Best for: Owners of three-phase homes or properties, including supported Delta installations, who want real-time monitoring with Wi-Fi or Ethernet and cloud reporting.
Not ideal for: Buyers who need listed branch-circuit monitoring, want a fully local data setup, or need net-metering breakdown from a single unit.
- Phase:3-phase
- Voltage options:600V Delta, 480V/277V Wye, 208V/120V, and other configurations
- Included current sensors:3 × 200A split-core CTs
- Compatible sensor range:5A–6000A
- Connectivity:2.4 GHz Wi-Fi or Ethernet
- Cloud service:MyEyedro platform with no subscription fee
- Dimensions:10 × 7 × 3 inches
- Power adapter:6VAC North American adapter included; European Type C adapter sold separately
Our verdict“Choose this Eyedro for three-phase and Delta monitoring with cloud reports, but look elsewhere if circuit-by-circuit data is your priority.”
Siemens Inhab Smart Home Energy Monitor with Circuit and Main Sensors
The Siemens Inhab goes beyond displaying household consumption by pairing main and circuit sensors with app features for time-of-use, peak demand, excess solar, net metering, and load shedding. It monitors two 200A mains and up to 16 circuits, giving households a way to identify which loads drive usage before setting alerts or managing compatible devices. Compared with the Refoss EM16P, Siemens puts the emphasis on mobile-app energy management rather than a listed set of local web, API, and MQTT access options. Its 16 included circuit sensors are rated at 50A, below the 60A branch sensors listed for the Meross EM16 and Refoss EM16P, so circuit capacity deserves a check against the panel and loads. App availability is limited to the US and Canada, and load shedding depends on compatible devices.
Pros:- Monitors two main circuits and up to 16 individual circuits
- Includes app features for time-of-use, peak demand, solar, and net-metering management
- Supports customizable energy notifications
- UL Listed in the US and Canada
Cons:- Mobile app availability is limited to the US and Canada
- Load shedding requires compatible devices
- Included circuit sensors are rated at 50A
Best for: Households in the US or Canada that want app-based circuit monitoring plus tools for solar management, peak demand, and compatible load control.
Not ideal for: Buyers outside the US and Canada, users seeking listed Home Assistant or local API integration, or homes with circuits that exceed the included 50A sensor rating.
- Main sensors:2 × 200A CTs
- Circuit sensors:16 × 50A CTs
- Connectivity:Wi-Fi and mobile app
- Compatibility:USA and Canada
- Energy management features:Time-of-use, peak demand, excess solar, net metering, and load shedding for compatible devices
- Weight:4.8 pounds
- Dimensions:1.1 × 5.71 × 2.76 inches
- Certification:UL Listed in the US and Canada
Our verdict“Choose the Siemens Inhab if you want app-led energy management and your compatible devices can use its load-control features.”
Plug-In Watt Meter and Home Electricity Usage Monitor
For checking what a single appliance draws, this plug-in meter is a more direct fit than the Emporia Vue 3, which requires panel access and is built for whole-home and circuit monitoring. Seven display modes cover power, accumulated energy, voltage, current, frequency, power factor, estimated cost, and minimum or maximum power, giving appliance-level checks more context than a basic watt reading. The backlit LCD has several timeout options, and memory retains recent readings through an unplugging or power failure. Adjustable overload protection reaches 3680 W, but I would not treat that setting as ready to use without checking whether its threshold suits the connected appliance. It also cannot show household or circuit-wide consumption, so buyers seeking a broader view should choose a panel monitor instead.
Pros:- Displays energy use alongside voltage, current, power factor, and other measurements
- Backlit LCD offers several adjustable viewing durations
- Retains recent readings after unplugging or a power interruption
- Overload protection can be adjusted up to 3680 W
Cons:- The overload threshold may need adjustment before use
- Monitors only the appliance connected through the plug
- No app-based or remote monitoring is specified
Best for: Renters and homeowners who want to measure the consumption and estimated running cost of individual plug-in appliances without opening an electrical panel
Not ideal for: Buyers who need whole-home or circuit-level tracking, or who want automatic app-based monitoring
- Display:2.36 × 1.85-inch backlit LCD
- Display modes:7
- Measurements:Power, energy, voltage, current, frequency, power factor, estimated cost, minimum and maximum power
- Backlight settings:10 minutes, 1 hour, 4 hours, 8 hours, or always on
- Overload protection:Adjustable from 0 to 3680 W
- Data memory:Retains readings after unplugging or power failure
Our verdict“Choose this plug-in meter for detailed checks of individual appliances, not for a whole-house energy picture.”
Emporia Vue 3 Home Energy Monitor with 16 Circuit Sensors
The Emporia Vue 3 is the clearest choice here for buyers who want to see both whole-home consumption and where that electricity is going across as many as 16 branch circuits. Its clamp-on sensors feed real-time data to an app, while solar and net metering support makes it relevant to households tracking energy flows in both directions. Compared with the plug-in watt meters in this roundup, it can reveal patterns across a home rather than one outlet at a time; unlike the Emporia bundle with four smart plugs, it does not add outlet-level remote control. Installation requires access to the circuit panel, and the system depends on 2.4 GHz Wi-Fi and an internet connection. Some three-phase setups also need a separately sold 200A sensor, so panel compatibility deserves a check before choosing it.
Pros:- Tracks whole-home use and up to 16 individual branch circuits
- Supports solar and net metering
- Provides real-time app-based energy data
- UL and CE Listed
Cons:- Installation requires access to the electrical panel
- Requires 2.4 GHz Wi-Fi and an internet connection
- Some three-phase configurations need an additional 200A sensor sold separately
Best for: Homeowners with a compatible electrical panel who want app-based whole-home and individual-circuit data, including households with solar
Not ideal for: Renters, buyers unable to access or work with a circuit panel, or households without reliable 2.4 GHz Wi-Fi and internet
- Model:EMV3A-2P-16
- Circuit sensors:16 branch sensors, 50A
- Accuracy:±2%
- Connectivity:2.4 GHz Wi-Fi and internet connection
- Solar support:Supports solar and net metering
- Dimensions:10 × 5 × 5 inches
- Certifications:UL and CE Listed
- Warranty:1 year
Our verdict“Pick the Vue 3 if circuit-level app tracking matters more than a no-install plug-in meter or bundled outlet controls.”
MECHEER JK-PM07-2P-US Power Meter Plug, 2-Pack
This two-pack makes sense when the goal is to compare a pair of appliances or leave meters in two frequently checked locations. Like the single plug-in watt meter in this roundup, each unit reports several electrical measurements and estimated cost, but MECHEER adds eight display modes and adjustable overload and energy-consumption alarms. Saved settings and cumulative usage survive a power loss, making longer appliance checks less dependent on uninterrupted power. The tradeoff is that the saved data is selective: current, voltage, power, and power factor readings are not retained, and the backlight works only while the meter is connected to AC. As with other outlet meters, this is not a substitute for the Emporia Vue 3 if you need whole-home or branch-circuit visibility.
Pros:- Two meters allow simultaneous checks of separate appliances
- Reports multiple electrical readings and estimated electricity cost
- Includes adjustable overload and energy-consumption alarms
- Saves settings and cumulative usage data through power loss
Cons:- Current, voltage, power, and power factor readings are not saved
- Backlight operates only while connected to AC power
- Provides outlet-level monitoring rather than whole-home data
Best for: Households that want to track two plug-in appliances at once and value consumption alarms alongside estimated cost
Not ideal for: Buyers who need whole-home circuit monitoring, saved records of every electrical reading, or a display that stays lit without AC power
- Model:JK-PM07-2P-US
- Quantity:2-pack
- Display modes:8
- Measurements:Power, energy, voltage, current, frequency, power factor, and estimated electricity cost
- Overload protection:Adjustable from 0 to 3680 W
- Alarms:Adjustable overload and energy-consumption alarms
- Backlight settings:10 minutes, 1 hour, 4 hours, 8 hours, or always on
- Dimensions:5.2 × 2.7 × 2.4 inches
Our verdict“Choose this pair for side-by-side appliance monitoring and alarms, but select a panel monitor for household circuit visibility.”
Emporia Vue Energy Monitor Bundle with 16 Sensors and 4 Smart Plugs
This bundle combines whole-home and up-to-16-circuit monitoring with four smart plugs, so it covers more than the Vue 3 alone: the plugs add outlet-level usage data, remote control, and scheduling through the Emporia app. Second-by-second tracking and solar net metering support suit households that want to connect broad energy patterns with the behavior of individual appliances. Alexa compatibility adds a voice-control option, while the app provides trends and energy-saving insights. Compared with the MECHEER two-pack, this is a larger system built around home circuits and connected control rather than local outlet displays. The added reach comes with a panel-installation requirement, and the product information does not specify installation details. Energy data is stored in the cloud, which may not suit buyers who prefer locally retained records.
Pros:- Monitors whole-home use and up to 16 circuits
- Includes four smart plugs for outlet monitoring, remote control, and schedules
- App offers usage trends and energy-saving insights
- Supports solar net metering and Alexa-enabled devices
Cons:- Energy data is stored in the cloud
- Product information does not provide installation details
- Circuit monitoring requires a suitable panel installation
Best for: Connected-home owners who want circuit-level energy data plus remote control and scheduling for several plug-in appliances
Not ideal for: Renters or privacy-focused buyers who want a non-cloud monitor, and anyone seeking installation guidance in the product details
- Included circuit sensors:16
- Included smart plugs:4
- Tracking:Whole-home and circuit monitoring with second-by-second energy tracking
- App:Emporia app for iOS and Android
- Smart-home compatibility:Alexa-enabled devices
- Solar support:Supports solar net metering
- Smart plug functions:Remote control, outlet-level usage monitoring, and scheduling
Our verdict“Choose this bundle when you want panel data and smart control at several outlets in one connected system.”
10-Circuit Smart Home Energy Monitor with AI Analysis and Home Assistant Support
For a technically minded buyer, this monitor’s strongest distinction is its mix of 10 circuit channels, bidirectional metering, and support for Home Assistant, MQTT, and Modbus TCP. Wi-Fi and Ethernet give more connection flexibility than the Wi-Fi-only Emporia Vue 3, while app and web access provide ways to review and configure data. It also supports several listed residential electrical configurations, a useful fit for homes that do not match a single standard setup. Data history has a defined limit: minute-level records are kept for 45 days, though monthly and yearly summaries remain available for 36 months. Compared with the Emporia bundle, it has fewer monitored circuits and no included smart plugs, but it offers broader integration options. Buyers should confirm system compatibility and plan for panel installation.
Pros:- Monitors up to 10 circuits with bidirectional metering
- Supports Wi-Fi and Ethernet
- Integrates with Home Assistant, MQTT, and Modbus TCP
- Supports several listed residential electrical configurations
Cons:- Minute-level data is retained for only 45 days
- Offers fewer circuit channels than the 16-sensor Emporia options
- Requires electrical-panel installation and configuration
Best for: Homeowners and automation enthusiasts who want multi-circuit monitoring with Home Assistant, MQTT, or Modbus integration and a choice of Wi-Fi or Ethernet
Not ideal for: Buyers who need more than 10 monitored circuits, included smart plugs, or long-term access to minute-by-minute records
- Model:eMonHub-HNA0A
- Circuit monitoring channels:10
- Metering:Bidirectional
- Connectivity:Wi-Fi and Ethernet
- Integrations:Home Assistant, MQTT API, and Modbus TCP
- Data retention:45 days for minute data; 36 months for monthly and yearly summaries
- Supported systems:North American split-phase, Brazil two-phase three-wire, and configurable single-phase or three-phase systems
- Dimensions:4.73 × 3.15 × 1.22 inches
- Certifications:FCC and CE
Our verdict“Choose this monitor for integration flexibility and Ethernet support, provided 10 circuits and its data-retention limits fit your needs.”
How We Picked
I ranked these monitors by how well they answer the questions household buyers usually have: how much of the home can be measured, whether readings can be tied to circuits or individual appliances, and how manageable installation and setup are likely to be. I also weighed the stated smart-home integrations, sensor counts, connection options, and whether a model is meant for a standard home panel, a plug-in appliance, or a specialized electrical system. Those differences matter more than a long feature list when choosing a monitor that fits the actual job.
The ordering favors flexible, household-oriented systems with broad circuit visibility, then models that trade some coverage for a specific strength such as Home Assistant support or easier appliance checks. Plug-in meters rank lower for whole-home monitoring because they only report on connected devices, but they can be the better match for buyers who do not need panel data. Specialized three-phase equipment is ranked for its narrower audience, not treated as a substitute for a standard residential monitor. I have not assumed unprovided specifications or hands-on test results.
Factors to Consider When Choosing Best Home Electricity Monitors
Choose a monitor around the kind of answer you need, not simply the number of sensors or smart features listed. These decisions help prevent a mismatch between the device, your electrical panel, and the way you plan to use its readings.
Decide Whether You Need Whole-Home or Appliance-Level Data
Whole-home monitors track the supply entering your home, while circuit sensors can help separate major loads such as heating or cooking. Plug-in meters measure only the appliance connected through them, so they cannot reveal the combined draw of hardwired equipment or the whole panel. A common mistake is buying a plug meter expecting a household-wide energy picture. If your main question is which portable appliance uses the most electricity, a plug-in model may be enough. If you want to compare household loads or look for a circuit drawing power unexpectedly, prioritize a panel-based system. Some buyers will benefit from both approaches, but start with the question you most want answered.
Check Panel Fit and Sensor Count Before You Buy
Count the circuits you actually want to track and check whether the monitor’s sensors can fit the conductors in your panel. A stated capacity of 16 or 18 circuits does not mean every circuit must be monitored, nor does it guarantee compatibility with every panel layout. Buyers can waste capacity by counting breaker spaces instead of identifying the individual loads they care about. Also check whether your panel has room for the sensor clamps and whether the monitor calls for a particular electrical configuration. If you only want to follow a few major loads, a larger sensor bundle may add setup work without answering more useful questions. When panel compatibility is unclear, ask a qualified electrician before ordering.
Treat Installation as Part of the Purchase Decision
Panel-based monitors involve working near household wiring, so installation is not just a software setup choice. Even when sensors clamp around conductors, accessing the panel and routing connections can call for electrical knowledge and safe working practices. Do not assume that a device described as smart or easy to install is suitable for DIY work in every home. Plug-in meters avoid panel access but offer a much narrower view of energy use. If you plan to hire an electrician, check what installation steps the monitor requires so you can discuss the job clearly. The right choice is the one you can install safely and maintain, not just the one with the most measurement points.
Choose Smart-Home Integration for a Specific Purpose
Home Assistant support can be valuable if you already use that platform and want energy readings alongside other household data or automations. It adds less value if you only plan to glance at an app occasionally, so do not select a model on integration claims alone. Before buying, confirm which readings are exposed, whether local or cloud services are involved, and whether setup requires extra configuration. Buyers sometimes assume that support for a platform means every feature works automatically; integrations can differ in setup effort and available data. A simpler monitor can be the more practical pick when the goal is basic visibility. Prioritize integration only when you have a clear use for the data it provides.
Match the Monitor to Your Electrical System
Most homes need equipment designed for their own panel and supply, while three-phase meters target a different electrical setup. A product’s current or voltage capacity alone does not confirm that it matches your home’s wiring or local requirements. Check the monitor’s supported system type and sensor arrangement against your electrical service before comparing other features. This matters especially for buyers considering specialized equipment such as the Eyedro three-phase model. If you cannot identify your system confidently, consult an electrician rather than inferring compatibility from the product name. Choosing the right system type comes before adding circuit sensors or smart-home features.
Think About What You Will Do With the Readings
Energy data is most useful when it supports a decision, such as spotting a standby load, comparing an appliance’s use, or planning when to run equipment. A monitor that shows more detail can still be a poor fit if its readings are hard to interpret or do not match your routine. AI analysis, alerts, and connected plugs may help some households act on data, but they are not substitutes for accurate measurement or clear setup. Decide whether you need live power, historical trends, circuit comparisons, or appliance-level checks before choosing. Avoid buying extra features simply because they sound advanced. The right level of detail is the one you can use to change a habit or investigate a specific load.
Frequently Asked Questions
Can I install a panel-based electricity monitor myself?
That depends on the monitor’s wiring requirements, your panel layout, and your electrical experience. Even clamp-style sensors are fitted inside an electrical panel, where unsafe handling can cause serious harm. Follow the manufacturer’s installation instructions and local rules, and use a qualified electrician if you are not confident working around the panel. A plug-in watt meter avoids panel access, but it only measures the appliance connected to it. The convenience difference should not outweigh safe installation.
Will a 16- or 18-circuit monitor track every appliance in my home?
Not necessarily. Circuit sensors measure the conductors they are attached to, and a single circuit may serve several outlets or appliances. Some hardwired loads can share circuits, while other equipment may need its own sensor to appear separately. The main service reading and circuit readings can also answer different questions. Before buying, identify which loads you want to isolate and check how the device handles circuits that are not individually monitored. A higher sensor count expands options, but it does not guarantee appliance-by-appliance data.
Should I choose a Home Assistant-compatible monitor if I do not use Home Assistant now?
Only if you expect to adopt it or have another clear use for the integration. Platform support can be valuable for local dashboards and automations, but it may add setup steps that do not help someone seeking a straightforward energy summary. Check what data the integration exposes and whether the features you want depend on an account, cloud access, or extra configuration. If you only need to identify high-use circuits, prioritize sensor coverage and a usable monitoring interface. You can choose a Home Assistant-focused model for flexibility, but that flexibility is not a benefit by itself.
Is a plug-in watt meter enough to monitor my home’s electricity use?
A plug-in meter is useful for measuring compatible appliances connected directly through it, such as a portable device or small household appliance. It will not report the home’s total consumption, hardwired equipment, or the combined demand across multiple circuits. That makes it a focused diagnostic tool rather than a substitute for a whole-home monitor. If your goal is to compare one appliance with another, a plug model can be a sensible starting point. If you want to understand overall household use, choose a panel-based monitor or pair approaches for different questions.
Do I need a three-phase electricity monitor for a typical home?
Most buyers should first confirm the type of electrical service installed at their home rather than assume a three-phase meter is appropriate. A three-phase model is intended for systems that match its supported configuration, which may include specialized residential or commercial installations. A product’s current and voltage ratings do not by themselves prove compatibility with a standard household panel. Check your service details and the manufacturer’s supported wiring arrangement before purchase. If you are unsure, an electrician can identify the system and help avoid choosing a monitor that cannot be installed correctly.
Conclusion
For the broadest household circuit view in this lineup, I recommend the Emporia Vue 3 as the best overall pick, with the Refoss EM16P or another 16-sensor option worth comparing for buyers focused on circuit coverage. For best value, I would start with a plug-in watt meter if you only need to check individual appliances; it avoids paying for panel-wide features you may not use. The Emporia Vue Energy Monitor Bundle is my premium choice for buyers who want both circuit sensors and smart plugs in one setup. Beginners who want to check a single appliance should start with a plug-in meter, while buyers new to panel monitoring should arrange safe installation and confirm panel fit before choosing a circuit model. For Home Assistant users, compare the Sungrass eMonHub, Meross, and AI-analysis options against your preferred setup; for a compatible three-phase system, consider the Eyedro 3-Phase. Match the monitor to the readings you need, and the shortlist becomes much easier to manage.
Halloween Picks
halloween
As an affiliate, we earn on qualifying purchases.
