Smart home energy monitors range from simple outlet-level plugs to systems that track power across an electrical panel. I rank the Emporia Vue 3 with 16 Circuit Sensors as the best overall choice for broad circuit visibility, while the Refoss EM16P stands out for open API and Home Assistant support, and the Tapo P115 four-pack offers an approachable way to track individual plug-in devices. The main tradeoff is whether you need whole-home and circuit-level data, or just want to identify the draw of a few appliances. Installation, sensor count, local access, and smart-home compatibility can matter as much as the monitor’s headline features. Read on for the full comparison and guidance on matching a monitor to your home.
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Key Takeaways
- The roundup splits into two distinct approaches: panel monitors such as the Emporia Vue 3 and Meross models track circuits, while Tapo and Emporia smart plugs measure devices at individual outlets.
- More sensors can mean more useful coverage, not automatically a better fit. Sixteen-sensor kits suit homes with many circuits; an eight-sensor kit or whole-home CT monitor may be a better match for simpler tracking needs.
- Open integrations separate the DIY-friendly picks. Refoss EM16P’s open API and Home Assistant support are a stronger fit for custom automations than a monitor chosen mainly for app-based tracking.
- Local control and installation are meaningful tradeoffs. The Refoss model with local control prioritizes a different setup than plug-in monitors, while panel-mounted systems require careful attention to electrical compatibility and installation.
- Choose the measurement point before choosing the brand. Outlet monitors identify individual appliance use; panel sensors reveal circuit or whole-home patterns that plugs cannot capture on their own.
| Tapo Smart Plug Wi‑Fi, Energy Monitoring, P115 (4‑Pack), 15A |  | Best for Plug-Level Monitoring | Maximum wattage: 1800 W | Operating voltage: 110 V AC | Connectivity: 2.4 GHz Wi-Fi | VIEW LATEST PRICE | See Our Full Breakdown |
| Meross Smart Home Energy Monitor with 16 Circuit Sensors |  | Best for Long-Term Circuit Data | Main circuits: 2, up to 200 A | Branch circuits: Up to 16, up to 60 A | Measurement accuracy: ±1% | VIEW LATEST PRICE | See Our Full Breakdown |
| Refoss Smart Home Energy Monitor with 16 60A Circuit Sensors and Local Control |  | Best for Local Automation | Main sensors: 2, up to 200 A | Branch sensors: 16, up to 60 A | Accuracy: ±1% | VIEW LATEST PRICE | See Our Full Breakdown |
| Meross Smart Home Energy Monitor, 18-Circuit, Home Assistant Compatible | | Best for Solar-Aware Monitoring | Circuit monitoring: 2 main circuits up to 200 A and 16 branch circuits up to 60 A | Accuracy: ±2% | Supported systems: Single-phase 2-wire, split-phase 3-wire, and 3-phase 4-wire Wye with earthed neutral; no Delta | VIEW LATEST PRICE | See Our Full Breakdown |
| WiFi Home Energy Monitor with Two 120A Clamps |  | Best for Basic Whole-Home Tracking | Current sensors: Two 120 A CT clamps | Accuracy: ±2% | Connectivity: 2.4 GHz Wi-Fi with internet access | VIEW LATEST PRICE | See Our Full Breakdown |
| Emporia Vue 3 Home Energy Monitor with 8 Circuit Sensors |  | Best for Solar-Focused Households | Circuit sensors: 8 | Accuracy: ±2% | Connectivity: 2.4 GHz Wi-Fi and internet connection required | VIEW LATEST PRICE | See Our Full Breakdown |
| Smart Home Energy Monitor with 16 Circuit Sensors |  | Best for Home Assistant and Local MQTT | Circuit sensors: 16 clamp-on sensors, 50A each | Measurement accuracy: 1% | Voltage support: Up to 240VAC single-phase; 120/240VAC split-phase; up to 415Y/240VAC three-phase; no Delta | VIEW LATEST PRICE | See Our Full Breakdown |
| Emporia Energy Monitoring Smart Plug (4 Pack) – WiFi Outlet with Timer, Home Energy Monitor, and Alexa/Google Home Compatibility |  | Best for Plug-In Appliance Tracking | Pack size: 4 plugs | Voltage: 120V | Wattage: 1200W | VIEW LATEST PRICE | See Our Full Breakdown |
| Refoss EM16P Smart Home Energy Monitor with Open API and Home Assistant |  | Best for Cloud-Free Historical Tracking | Main circuit sensors: 2, 2–200A each | Branch circuit sensors: 16, 1–60A each | Accuracy: ±1%; ±2% at low current | VIEW LATEST PRICE | See Our Full Breakdown |
| Emporia Vue 3 Home Energy Monitor with 16 Circuit Sensors |  | Best for Broad Circuit Coverage in the Emporia App | Included branch sensors: 16, 50A each | Sensor accuracy: ±2% | Connectivity: 2.4 GHz Wi-Fi and internet connection required | VIEW LATEST PRICE | See Our Full Breakdown |
| Leviton LWHEM-2R Whole Home Energy Monitor with One Pair of CTs |  | Best for Leviton Smart Breaker Owners | Model: LWHEM-2R | Connectivity: Wi-Fi | Included current transformers: 1 pair | VIEW LATEST PRICE | See Our Full Breakdown |
| WiFi Home Energy Monitor with 2 x 120A CTs and Power Tracking |  | Best for Simple Solar and Grid Tracking | Connectivity: 2.4 GHz Wi-Fi | Current transformers: 2 × 120A split-core CTs | Supported system: Single-phase, 3-wire | VIEW LATEST PRICE | See Our Full Breakdown |
| Siemens Inhab Smart Home Energy Monitor with Circuit-Level Sensors |  | Best for Detailed Circuit-Level Insight | Model: INHEM1216 | Main sensors: 2 × 200A CTs | Circuit sensors: 16 × 50A CTs | VIEW LATEST PRICE | See Our Full Breakdown |
| Smart Home Energy Monitor with 8 50A Circuit Sensors |  | Best for Local-First Home Assistant Setups | Manufacturer and model: Fusion Energy SEM-Meter | Included sensors: 8 × 50A clamp-on sensors | Additional sensor capacity: Up to 8 more sensors | VIEW LATEST PRICE | See Our Full Breakdown |
| Eyedro Smart Home Energy Monitor, 200A, WiFi and Ethernet |  | Best for Flexible Network Connections | Model: EYEDRO-HOME | Current sensor capacity: 200A per sensor | Included sensors: Two directional current sensors | VIEW LATEST PRICE | See Our Full Breakdown |
| smart home energy monitor | Connectivity | Warranty |
|---|---|---|
| Tapo Smart Plug Wi‑Fi | 2.4 GHz Wi-Fi | — |
| Meross Smart Home Energy Monit | — | 2 years |
| Refoss Smart Home Energy Monit | — | 2 years |
| Meross Smart Home Energy Monit | — | 2 years |
| WiFi Home Energy Monitor with | 2.4 GHz Wi-Fi with internet access | — |
| Emporia Vue 3 Home Energy Moni | 2.4 GHz Wi-Fi and internet connection required | 1 year |
| Smart Home Energy Monitor with | 2.4 GHz Wi-Fi and local MQTT mode | 1 year |
| Emporia Energy Monitoring Smar | 2.4 GHz Wi-Fi only | 1 year |
| Refoss EM16P Smart Home Energy | Built-in Web UI, Open API, and MQTT | 2 years |
| Emporia Vue 3 Home Energy Moni | 2.4 GHz Wi-Fi and internet connection required | 1 year |
| Leviton LWHEM-2R Whole Home En | Wi-Fi | — |
| WiFi Home Energy Monitor with | 2.4 GHz Wi-Fi | — |
| Siemens Inhab Smart Home Energ | Wi-Fi and mobile app | — |
| Smart Home Energy Monitor with | 2.4 GHz Wi-Fi; local MQTT mode | 1 year |
| Eyedro Smart Home Energy Monit | 2.4 GHz Wi-Fi or Ethernet | — |
More Details on Our Top Picks
Tapo Smart Plug Wi‑Fi, Energy Monitoring, P115 (4‑Pack), 15A
I’d choose the Tapo P115 4-pack when I want to identify the energy use of specific appliances without opening the breaker panel. Its app provides real-time readings, usage charts, and bill estimates, while scheduling and auto shutoff add practical control over plugged-in devices. Compared with the Meross EM16, it tracks individual outlets rather than whole-home and branch circuits, so it cannot show what hardwired loads are consuming. The four-plug bundle makes that narrower view useful across several rooms, and its compact shape helps when outlets sit close together. The tradeoff is that it relies on 2.4 GHz Wi-Fi, lacks Apple HomeKit support, and may have app connectivity hiccups. I’d pick it for appliance-level visibility, not a full electrical-panel audit.
Pros:- Four plugs let you monitor several appliances separately.
- App charts and bill estimates make outlet-level usage easier to interpret.
- Scheduling, auto shutoff, and smart charging add device-control options.
- Works with Alexa and Google Assistant.
Cons:- Monitors plugged-in devices rather than whole-home or breaker-level circuits.
- Requires 2.4 GHz Wi-Fi and has no Apple HomeKit integration.
- App connectivity hiccups may interrupt monitoring or control.
Best for: Renters and homeowners who want to track and schedule several plug-in appliances without installing sensors in a breaker panel.
Not ideal for: Buyers who need whole-home or hardwired-circuit data, Apple HomeKit, or a monitor that works without Wi-Fi.
- Maximum wattage:1800 W
- Operating voltage:110 V AC
- Connectivity:2.4 GHz Wi-Fi
- Control method:App
- Voice assistant compatibility:Amazon Alexa and Google Assistant
- Smart home compatibility:SmartThings
- Mounting:Plug-in
- Certifications:ETL, FCC, RoHS
Our verdict“Choose the Tapo P115 if you want accessible energy tracking and control for several plug-in devices rather than a whole-panel monitor.”
Meross Smart Home Energy Monitor with 16 Circuit Sensors
The Meross EM16 suits buyers who want a detailed breaker-panel view paired with a long record of household usage. It measures two main circuits and up to 16 branch circuits, with stated ±1% accuracy and as much as five years of local data. That combination can help separate the load of individual circuits and compare patterns over time, rather than relying on the plug-level snapshots from the Tapo P115. Home Assistant support, an Open API, alerts, and data export also give technically minded owners more ways to use the readings. The main compromise is installation: the included current transformers belong in the electrical panel, so compatibility with the home’s wiring and safe installation matter. It also excludes Delta systems. Compared with the Refoss EM16P, the listed integrations are less extensive, but this Meross includes a clear five-year storage claim.
Pros:- Tracks two main circuits and up to 16 branch circuits.
- States ±1% measurement accuracy.
- Stores up to five years of local data and supports usage alerts and export.
- Includes Home Assistant, Open API, and web control support.
Cons:- Requires installation in the breaker panel and compatible household wiring.
- Does not support Delta systems.
- Its circuit sensors offer more setup complexity than plug-level monitors such as the Tapo P115.
Best for: Homeowners with compatible wiring who want long-term, circuit-by-circuit records and Home Assistant or API access.
Not ideal for: Renters, buyers who want a plug-in setup, or households with Delta wiring or no qualified help for panel installation.
- Main circuits:2, up to 200 A
- Branch circuits:Up to 16, up to 60 A
- Measurement accuracy:±1%
- Data storage:Up to 5 years
- Supported systems:Single-phase 2-wire, split-phase 3-wire, and 3-phase 4-wire Wye with earthed neutral; no Delta
- Integrations:Home Assistant, Open API, web control
- Warranty:2 years
- Dimensions:4.5 × 3.48 × 1.1 inches
Our verdict“Choose the Meross EM16 if your wiring is supported and you want detailed circuit data retained locally for years.”
Refoss Smart Home Energy Monitor with 16 60A Circuit Sensors and Local Control
I’d put the Refoss EM16P on the shortlist for a technically confident buyer who wants local access and flexibility to build custom automations. It monitors two main sensors and 16 branch circuits, with stated ±1% precision and five years of daily data. Its mix of a local web interface, Open API, MQTT, WebSocket, and Home Assistant offers more integration paths than the Meross EM16, which lists Home Assistant, an Open API, and web control. That extra flexibility is useful when a buyer wants to connect energy readings to a broader smart-home setup rather than simply view app charts. The tradeoff is still panel-level installation, and the listing’s wording can be confusing: it describes monitoring up to 18 circuits while the title calls out 16 circuit sensors. I’d confirm the included sensor layout before purchase.
Pros:- Monitors two main sensors plus 16 branch sensors.
- Offers local web access, Open API, MQTT, WebSocket, and Home Assistant support.
- Stores daily data for five years and supports CSV export and energy alerts.
- Includes an external antenna and a two-year warranty.
Cons:- Installing the sensors requires work inside the breaker panel.
- The title and circuit-count description may leave the exact sensor configuration unclear.
- The supported system list does not include Delta wiring.
Best for: Home Assistant users and smart-home hobbyists who want local data access, MQTT options, and custom energy automations.
Not ideal for: Buyers seeking a simple plug-in monitor, those uncomfortable with breaker-panel installation, or anyone with unsupported wiring.
- Main sensors:2, up to 200 A
- Branch sensors:16, up to 60 A
- Accuracy:±1%
- Data retention:Daily data stored for 5 years
- Supported systems:Single-phase, split-phase, and 3-phase 4-wire Wye
- Connectivity and integrations:Wi-Fi, local web UI, Open API, MQTT, WebSocket, Home Assistant
- Certification:ETL
- Warranty:2 years
Our verdict“Choose the Refoss EM16P if local integrations and automation flexibility matter more to you than a simpler monitoring setup.”
Meross Smart Home Energy Monitor, 18-Circuit, Home Assistant Compatible
This Meross 18-circuit monitor is the more fitting Meross pick when solar surplus detection matters alongside whole-home and branch-circuit readings. It tracks two main circuits and up to 16 branch circuits, adds solar surplus detection and smart alerts, and keeps data locally for as long as five years. Compared with the Meross EM16 with 16 circuit sensors, the key distinction is not circuit coverage but the stated measurement accuracy: this model lists ±2% rather than ±1%. That makes it a less exacting fit for buyers focused on the tightest stated measurement tolerance, but the solar feature gives energy-conscious households a different reason to choose it. It supports Home Assistant and needs compatible wiring; Delta systems are excluded. Since installation happens at the panel, I’d check the home’s electrical configuration before choosing it over the plug-in Tapo P115.
Pros:- Monitors two main circuits and up to 16 branch circuits.
- Includes solar surplus detection and smart alerts.
- Supports Home Assistant and stores data locally for up to five years.
- ETL-certified and listed as compliant with UL 61010 testing standard.
Cons:- Stated accuracy is ±2%, compared with ±1% for the other listed Meross EM16 and the Refoss EM16P.
- Does not support Delta electrical systems.
- Requires panel installation and wiring compatibility checks.
Best for: Homeowners with a compatible panel who want circuit-level monitoring and solar-surplus awareness in a Home Assistant setup.
Not ideal for: Buyers who need stated ±1% accuracy, have Delta wiring, or want a no-panel-installation option.
- Circuit monitoring:2 main circuits up to 200 A and 16 branch circuits up to 60 A
- Accuracy:±2%
- Supported systems:Single-phase 2-wire, split-phase 3-wire, and 3-phase 4-wire Wye with earthed neutral; no Delta
- Integrations:Home Assistant
- Solar feature:Solar surplus detection
- Data storage:Up to 5 years
- Certifications:ETL-certified; compliant with UL 61010 testing standard
- Warranty:2 years
Our verdict“Choose this Meross model if solar-surplus detection is a priority and its ±2% stated accuracy suits your monitoring needs.”
WiFi Home Energy Monitor with Two 120A Clamps
The WiFi Home Energy Monitor with Two 120A Clamps offers a simpler whole-home alternative to panel monitors built around many branch sensors. It tracks power, voltage, current, and power factor, and supports bidirectional measurement plus exports of hourly, daily, and monthly totals for up to one year. That makes it useful for spotting household patterns or checking individual device data without the five-year history and circuit-by-circuit coverage offered by the Meross EM16 and Refoss EM16P. Its Tuya integration can also suit homes already using Tuya devices. The tradeoffs are meaningful: stated accuracy is ±2%, it requires 2.4 GHz Wi-Fi and internet access, and the listing recommends professional installation. It excludes Delta systems as well. I’d choose it for straightforward overall tracking, not deep circuit diagnostics or long-term local data storage.
Pros:- Tracks power, voltage, current, and power factor in real time.
- Supports bidirectional measurement.
- Exports hourly, daily, and monthly totals plus individual-device data.
- Works with Tuya smart devices.
Cons:- Stated accuracy is ±2%, less precise on paper than the ±1% Meross EM16 and Refoss EM16P.
- Requires 2.4 GHz Wi-Fi and internet access.
- Professional installation is recommended, and Delta systems are excluded.
Best for: Homeowners who want app-based household energy readings, exportable usage history, and Tuya compatibility without monitoring many branch circuits.
Not ideal for: Buyers who need long-term local storage, detailed branch-circuit readings, offline access, or a Delta-compatible monitor.
- Current sensors:Two 120 A CT clamps
- Accuracy:±2%
- Connectivity:2.4 GHz Wi-Fi with internet access
- Supported systems:Single-phase, split-phase, 2-wire, and 2-phase 3-wire Wye with neutral; excludes Delta
- Data export:Hourly, daily, and monthly totals; individual-device data; up to 1 year of history
- Measurement:Power, voltage, current, power factor, and bidirectional measurement
- Smart home integration:Tuya smart devices
- Item weight:1.3 pounds
Our verdict“Choose this monitor for basic whole-home tracking and exportable data if you do not need extensive branch-circuit coverage or local-only operation.”
Emporia Vue 3 Home Energy Monitor with 8 Circuit Sensors
I’d pick this Vue 3 when solar production and net metering matter more than monitoring every branch circuit. Its eight sensors give a household a useful view of selected loads alongside whole-home energy activity, while the Emporia app supports energy management and automation. Compared with the 16-sensor Emporia Vue 3 in this roundup, this version leaves more circuits untracked, but may suit buyers who only need visibility into key appliances and solar flows. The tradeoff is that it relies on 2.4 GHz Wi-Fi and an internet connection, and one-second data is retained for only three hours. Some three-wire or three-phase setups also need an extra sensor, so check panel compatibility before buying.
Pros:- Tracks household use, solar production, and net metering
- Eight circuit sensors provide detail beyond a whole-home reading
- App tools support energy management and automation
- Cloud data can be exported
Cons:- Requires 2.4 GHz Wi-Fi and an internet connection
- One-second data is retained for only three hours
- Some three-wire and three-phase setups require an additional sensor
Best for: Solar-owning households that want app-based net-metering visibility and circuit data for a short list of major loads.
Not ideal for: Buyers who want to track more than eight branch circuits, need cloud-free operation, or have a panel configuration that requires additional sensors.
- Circuit sensors:8
- Accuracy:±2%
- Connectivity:2.4 GHz Wi-Fi and internet connection required
- Compatible access:iPhone, Android, and web app
- Supported systems:Single phase, single-split phase, and 2-wire; some 3-wire and 3-phase systems require an additional 200A sensor
- Certifications:UL and CE listed
- Dimensions:10 × 5 × 5 inches
- Warranty:1 year
Our verdict“Choose this Vue 3 if solar and a handful of key circuits are your priority; choose the 16-sensor version if broader circuit coverage matters more.”
Smart Home Energy Monitor with 16 Circuit Sensors
This monitor stands out for combining 16-circuit coverage with a local MQTT option, giving technically minded owners a path to bring energy data into Home Assistant without relying on the app’s cloud connection. Its stated 1% measurement accuracy is tighter than the ±2% listed for both Emporia Vue 3 models, and its voltage support includes several single-phase, split-phase, and three-phase arrangements, though not Delta. Compared with the Refoss EM16P, it also offers a substantial circuit count, but the supplied data gives less detail about local historical storage. The main catch is setup: it needs a compatible panel, and panels accessible only at the busbars require separately available flexible sensors. Local operation also assumes you already know your way around Home Assistant and MQTT.
Pros:- Sixteen 50A clamp-on sensors cover many branch circuits
- Local MQTT mode supports Home Assistant integration
- Tracks solar, net metering, usage, and customizable time-of-use rates
- Supports several single-phase, split-phase, and three-phase configurations
Cons:- Installation requires access to a compatible electrical panel
- Busbar-only panel access requires separately available flexible sensors
- Local operation depends on Home Assistant with MQTT
Best for: Home Assistant users who want local energy data and circuit-level tracking across many appliances, including an EV charger.
Not ideal for: Buyers seeking a simple app-only setup, or owners whose panel requires flexible sensors that they do not plan to source separately.
- Circuit sensors:16 clamp-on sensors, 50A each
- Measurement accuracy:1%
- Voltage support:Up to 240VAC single-phase; 120/240VAC split-phase; up to 415Y/240VAC three-phase; no Delta
- Connectivity:2.4 GHz Wi-Fi and local MQTT mode
- Data history:Hourly exports retained for 90 days; day, month, and year exports are permanent
- Dimensions:3.1 × 1.2 × 4.18 inches
- Weight:4.05 pounds
- Warranty:1 year
Our verdict“Pick this model if local MQTT control and broad circuit coverage matter more than a beginner-friendly setup.”
Emporia Energy Monitoring Smart Plug (4 Pack) – WiFi Outlet with Timer, Home Energy Monitor, and Alexa/Google Home Compatibility
Unlike the panel-mounted Vue 3 monitors, these four energy-monitoring plugs measure individual plug-in devices without opening an electrical panel. That makes them a more approachable fit for tracking appliances such as a television, desk setup, or small household device, with schedules and Alexa or Google Home control available through the Emporia app. They can help identify standby draw, but they do not provide whole-home or branch-circuit monitoring, so they are not a substitute for the 8- or 16-sensor panel monitors in this roundup. The 120V, 1200W rating and 10A continuous-load limit also rule them out for some high-draw equipment. Buyers must have 2.4 GHz Wi-Fi; 5 GHz-only networks are not supported.
Pros:- Four plugs track energy use at individual outlets
- Scheduling and remote control can help limit avoidable appliance use
- Works with Alexa and Google Home
- Avoids circuit-panel installation
Cons:- Does not monitor whole-home use, solar, or panel circuits
- Supports 2.4 GHz Wi-Fi only
- Continuous load is limited to 10A, with 15A peak allowed for only one hour per day
Best for: Renters or homeowners who want to measure and schedule a few 120V plug-in appliances without installing equipment in the breaker panel.
Not ideal for: Buyers who need whole-home, solar, or panel-level circuit monitoring, or who want to control high-draw appliances above the continuous-load limit.
- Pack size:4 plugs
- Voltage:120V
- Wattage:1200W
- Connectivity:2.4 GHz Wi-Fi only
- Compatibility:Alexa, Google Home, iOS, and Android
- Dimensions:1.97 × 3.31 × 1.5 inches
- Certifications:ETL and FCC
- Warranty:1 year
Our verdict“Choose this pack for outlet-level tracking and appliance scheduling, not as a replacement for a whole-home energy monitor.”
Refoss EM16P Smart Home Energy Monitor with Open API and Home Assistant
The Refoss EM16P is the clearest fit here for buyers who want energy monitoring to stay local and under their control. Its built-in web interface, Open API, MQTT, and native Home Assistant integration support monitoring and automation without a cloud service, while storage of up to five years of historical data helps reveal longer-term usage patterns. Compared with the 16-sensor Emporia Vue 3, the Refoss offers a more explicit local-control path and longer stated retention; the Emporia instead centers on its app and requires internet access. The Refoss includes two main sensors and 16 branch sensors, but still needs installation in the circuit panel. Its accuracy is ±1% generally and ±2% at low current, so small loads may be less precise.
Pros:- Web UI, Open API, MQTT, and Home Assistant integration work without cloud service
- Tracks main and branch circuits, including solar-related monitoring and automation
- Stores exportable historical data for up to five years
- Includes two main sensors and 16 branch sensors
Cons:- Requires access to the home circuit panel for installation
- Accuracy drops to ±2% at low current
- Local integrations may require more setup than an app-centered monitor
Best for: Home Assistant and self-hosting enthusiasts who want local solar and circuit monitoring with long-term historical records.
Not ideal for: Buyers who want a simple plug-in setup, cannot access their circuit panel, or expect the same accuracy on very low-current loads.
- Main circuit sensors:2, 2–200A each
- Branch circuit sensors:16, 1–60A each
- Accuracy:±1%; ±2% at low current
- Connectivity:Built-in Web UI, Open API, and MQTT
- Integration:Home Assistant
- Data storage:Up to 5 years
- Certification:ETL; compliant with UL 61010
- Warranty:2 years
Our verdict“Choose the EM16P if local control and long-term data storage outweigh a simpler cloud-app experience.”
Emporia Vue 3 Home Energy Monitor with 16 Circuit Sensors
For buyers who want to track many individual circuits while keeping solar and net-metering data in the Emporia app, this is the more capable Vue 3 configuration. Its 16 included 50A branch sensors cover twice as many circuits as the eight-sensor Vue 3, making it easier to separate major loads rather than leaving several unmeasured. Compared with the Refoss EM16P, this model is more app-centered and requires internet access; Refoss is the better match for cloud-free operation and longer stated data storage. The Emporia’s ±2% accuracy and one-year warranty are useful to weigh against those alternatives. Some three-wire and three-phase configurations need an additional sensor, and one-second data is available only while the app is open and lasts three hours.
Pros:- Includes sixteen 50A branch sensors for broad circuit coverage
- Monitors whole-home use, solar, and net metering
- Provides real-time readings and app-based energy management
- UL- and CE-listed
Cons:- Requires 2.4 GHz Wi-Fi and an internet connection
- Some three-wire and three-phase configurations require an additional sensor
- One-second data is available only while the app is open and is retained for three hours
Best for: Households with many major circuits to track, including solar owners who want monitoring and energy management through the Emporia app.
Not ideal for: Buyers who need cloud-free monitoring, long-term one-second data, or a supported panel configuration without extra sensors.
- Included branch sensors:16, 50A each
- Sensor accuracy:±2%
- Connectivity:2.4 GHz Wi-Fi and internet connection required
- Supported systems:Single phase, single-split phase, and 2-wire; some 3-wire and 3-phase configurations require an additional sensor
- Dimensions:10 × 5 × 5 inches
- Weight:4.77 pounds
- Certifications:UL and CE listed
- Warranty:1 year
Our verdict“Choose this Vue 3 over the eight-sensor version when you need more branch coverage and prefer Emporia’s app-based monitoring.”
Leviton LWHEM-2R Whole Home Energy Monitor with One Pair of CTs
The LWHEM-2R earns this role by joining whole-home energy tracking with control of compatible Leviton 2nd Gen Smart Circuit Breakers. Through the My Leviton app, owners can follow consumption and generation, then remotely control or schedule supported breakers—a step beyond the monitoring focus of the Eyedro EYEDRO-HOME. It can also connect with an automatic transfer switch and backup power system, making it a more natural fit for a Leviton-centered electrical setup. The tradeoff is ecosystem dependence: breaker control only works with compatible Leviton breakers, and the included single pair of CTs leaves up to three additional pairs as optional purchases. I’d choose it for compatible Leviton installations, not as a flexible circuit-by-circuit monitor out of the box.
Pros:- Reports real-time whole-home energy consumption and generation through the My Leviton app.
- Supports remote control, scheduling, and alerts for compatible Leviton 2nd Gen Smart Circuit Breakers.
- Can integrate with an automatic transfer switch and backup power system.
Cons:- Remote breaker features depend on owning compatible Leviton smart breakers.
- Only one CT pair is included; additional pairs for more monitoring inputs must be purchased separately.
Best for: Homeowners with compatible Leviton 2nd Gen Smart Circuit Breakers who want energy data alongside app-based breaker control or backup-power integration.
Not ideal for: Buyers seeking broad brand compatibility or several monitored circuits without purchasing additional CT pairs.
- Model:LWHEM-2R
- Connectivity:Wi-Fi
- Included current transformers:1 pair
- Additional CT capacity:Up to 3 optional pairs
- App:My Leviton
- Included components:Monitor, 1 pair of current transformers, installation accessories, and guide
- Color:White
Our verdict“Choose the LWHEM-2R if you already have compatible Leviton breakers and want energy monitoring tied to their control.”
WiFi Home Energy Monitor with 2 x 120A CTs and Power Tracking
This monitor is a straightforward pick for households that need bi-directional tracking of home use and solar export without a large set of circuit sensors. Its two 120A split-core CTs are designed for single-phase, 3-wire systems, and the Smart Life app adds live data, alerts, and automation scenes. Compared with the Leviton LWHEM-2R, it puts less emphasis on controlling branded smart breakers and more on accessible app-based monitoring; compared with the circuit-level Siemens Inhab, it gives less detail about which branches drive consumption. The quick, tool-free CT installation is a practical advantage, but the battery-powered unit may need battery replacement, and its supported electrical configuration rules out multi-phase homes. I’d match the wiring specification before choosing it.
Pros:- Tracks power in both directions for household use and solar export.
- Includes two 120A split-core CTs and supports quick installation with pluggable terminals.
- Provides real-time information, alerts, and automation scenes through the Smart Life app.
- Class 1 accuracy is specified for its power monitoring.
Cons:- Designed for single-phase, 3-wire systems rather than multi-phase setups.
- Battery-powered operation can require periodic battery replacement.
Best for: Owners of single-phase, 3-wire homes who want app-based tracking of household demand and solar export with Smart Life alerts.
Not ideal for: Households with multi-phase wiring or buyers who need branch-circuit-level energy breakdowns.
- Connectivity:2.4 GHz Wi-Fi
- Current transformers:2 × 120A split-core CTs
- Supported system:Single-phase, 3-wire
- Power source:Battery powered
- App:Smart Life
- Control method:App
- Measurement:Voltage, current, power, and total energy consumption
Our verdict“Pick this monitor for simple grid-and-solar tracking if your home has the supported single-phase wiring.”
Siemens Inhab Smart Home Energy Monitor with Circuit-Level Sensors
The Siemens Inhab stands out for buyers who want to see which circuits use energy, not just the home’s overall total. Its included sensors cover the mains and up to 16 branch circuits, with app access to real-time and historical use and production. That makes it a more detailed choice than the Eyedro EYEDRO-HOME, which monitors one selected energy source per unit, and a stronger fit for identifying individual circuit patterns than the Leviton LWHEM-2R with its included single CT pair. The app also supports custom alerts, time-of-use management, and excess solar management. That detail has a cost in installation complexity: sensors must be fitted at the electrical panel, and app availability is limited to the USA and Canada.
Pros:- Measures whole-home energy and up to 16 branch circuits.
- Includes two 200A mains sensors and 16 50A circuit sensors.
- App provides real-time and historical use and production data.
- Supports custom notifications, time-of-use management, and excess solar management.
Cons:- Installation requires access to the electrical panel and fitting multiple sensors.
- Mobile app availability is limited to the USA and Canada.
Best for: Homeowners in the USA or Canada who want to compare mains usage with energy consumption across as many as 16 branch circuits.
Not ideal for: Renters or buyers who cannot access their electrical panel, and households outside the USA and Canada seeking app support.
- Model:INHEM1216
- Main sensors:2 × 200A CTs
- Circuit sensors:16 × 50A CTs
- Monitoring coverage:Whole home and up to 16 branch circuits
- Connectivity:Wi-Fi and mobile app
- Dimensions:1.1 × 5.71 × 2.76 inches
- Certifications:CE marked; UL Listed in the US and Canada
- Region availability:USA and Canada
Our verdict“Choose the Siemens Inhab if circuit-by-circuit visibility matters more than a simpler whole-home-only setup.”
Smart Home Energy Monitor with 8 50A Circuit Sensors
Fusion Energy’s SEM-Meter is the standout here for households that want local data control and more than a basic whole-home reading. It includes eight 50A clamp-on sensors, supports up to eight more, and can send data locally through MQTT without cloud access. That gives it a different appeal from the Siemens Inhab, which supplies sensors for up to 16 branch circuits but centers on its mobile app, and the Leviton LWHEM-2R, which focuses on a Leviton breaker ecosystem. Support for solar and several single-, split-, and three-phase configurations adds flexibility, though Delta three-phase is not supported. Panel access is required, and installations limited to busbar access may need separately available flexible sensors. Its 90-day hourly export window is also shorter than its permanent daily, monthly, and yearly records.
Pros:- Includes eight 50A sensors and supports up to eight additional sensors.
- Can operate locally using MQTT without cloud or internet access.
- Supports solar and net metering, with several single-, split-, and three-phase configurations.
- Retains daily, monthly, and yearly data permanently.
Cons:- Installation requires access to the electrical panel.
- Does not support Delta three-phase systems.
- Flexible sensors for panels accessible only at busbars are sold separately.
Best for: Home Assistant or MQTT users who want local monitoring across multiple circuits, with support for solar and compatible three-phase configurations.
Not ideal for: Buyers with Delta three-phase systems, panels requiring busbar-only sensor access, or anyone avoiding electrical-panel installation.
- Manufacturer and model:Fusion Energy SEM-Meter
- Included sensors:8 × 50A clamp-on sensors
- Additional sensor capacity:Up to 8 more sensors
- Supported voltage configurations:Up to 240VAC line-neutral, 120/240VAC split-phase, and 415Y/240VAC three-phase; no Delta
- Connectivity:2.4 GHz Wi-Fi; local MQTT mode
- Measurement accuracy:1%
- Data history:Hourly exports valid for 90 days; daily, monthly, and yearly data permanent
- Warranty:1 year
Our verdict“Choose the SEM-Meter if local MQTT access and expandable circuit monitoring matter more than cloud convenience.”
Eyedro Smart Home Energy Monitor, 200A, WiFi and Ethernet
The Eyedro EYEDRO-HOME is a good fit when the priority is simple whole-home or solar monitoring with a choice of Wi-Fi or wired Ethernet. It includes two directional 200A sensors and reports watts, amps, volts, and dollars through MyEyedro cloud access without a subscription. That makes it less installation-focused than the Siemens Inhab, which adds branch-circuit sensors, but also less informative for pinpointing which circuits drive a bill. Its main limitation is easy to miss: one unit tracks only grid energy, solar generation, or net metering at a time. Buyers who need separate grid and solar readings must use two units, unlike the multi-circuit approach of the Fusion Energy SEM-Meter. I’d favor it for a straightforward setup where network flexibility matters more than simultaneous source tracking.
Pros:- Includes two directional 200A current sensors.
- Supports both 2.4 GHz Wi-Fi and Ethernet.
- MyEyedro cloud access has no subscription.
- Reports real-time readings in watts, amps, volts, and dollars.
Cons:- One unit monitors only grid energy, solar generation, or net metering at a time.
- Separate grid and solar tracking requires two units.
- Does not offer the included branch-circuit coverage of the Siemens Inhab or Fusion Energy SEM-Meter.
Best for: Homeowners seeking whole-home grid, solar, or net-metering data who need a choice between 2.4 GHz Wi-Fi and Ethernet.
Not ideal for: Solar households that want grid use and solar generation monitored simultaneously from one unit, or buyers needing circuit-level breakdowns.
- Model:EYEDRO-HOME
- Current sensor capacity:200A per sensor
- Included sensors:Two directional current sensors
- Connectivity:2.4 GHz Wi-Fi or Ethernet
- Power source:AC
- Cloud access:MyEyedro cloud, no subscription
- Monitoring options:Grid energy, solar generation, or net metering; one at a time per unit
- Included components:Sensor module, two 200A directional current sensors, 6VAC power adapter, Ethernet cable, and quick start guide
Our verdict“Pick the Eyedro if you want straightforward whole-home monitoring and Ethernet as an alternative to Wi-Fi, but not simultaneous grid and solar readings.”
How We Picked
I compared these products by what they measure, how much of a home they can cover, and how readily their data can support a household’s routine. Panel-based monitors received more weight for buyers seeking whole-home or circuit-level insight, while plug-in monitors were judged on how simply they track individual appliances. I also weighed sensor count and stated clamp capacity against the likely needs of different electrical setups, rather than treating a larger number as an automatic advantage.
Ranking reflects the balance of coverage, usability, integration options, and installation demands. The Emporia Vue 3 with 16 sensors leads for buyers who want detailed panel coverage; Refoss EM16P earns distinction for open integrations, and Tapo P115 ranks as an accessible device-level option. Products with narrower measurement scope, fewer stated sensors, or less clearly differentiated control options rank lower for broad household monitoring, though they may suit a specific use better. Confirm panel compatibility, installation requirements, and app or platform support before buying.
Factors to Consider When Choosing Smart Home Energy Monitors
Before choosing a monitor, decide what question you want the data to answer. A panel system can reveal how circuits contribute to household use, while a smart plug can isolate a single appliance. The best match depends on your electrical panel, comfort with installation, and whether you want data inside a particular smart-home platform.
Choose the Measurement Scope You Actually Need
Whole-home and circuit-level monitors answer different questions from outlet monitors. A panel unit can show broad household patterns and help identify which circuits carry heavier loads, while a plug can isolate one lamp, computer, or other plug-in device. A common mistake is buying several smart plugs and expecting a complete picture of hardwired equipment or total panel use. The reverse mistake is paying for panel installation when the only goal is comparing a few portable appliances. Decide whether you want appliance, circuit, or household data first, then choose the device type that measures at that level. Some households may get the clearest picture from combining a panel monitor with a small number of outlet monitors.
Match Sensor Count to Your Panel and Goals
Sensor count determines how many circuits can receive separate readings, but it does not by itself tell you how much useful information a system will provide. An eight-sensor kit can be enough if you want to follow a handful of major loads; a 16-sensor kit offers more room for circuit-by-circuit tracking. Check how many circuits your panel has and whether the product’s sensor arrangement fits its layout before selecting a kit. Buyers sometimes assume every circuit will be monitored individually, even when a kit has fewer sensors than the panel has circuits. Also check the stated clamp rating and confirm it suits the electrical service and circuits involved. If you are unsure about panel compatibility or installation, ask a qualified electrician before ordering.
Treat Installation and Electrical Safety as Part of the Decision
Panel monitors place sensors inside or near an electrical panel, so installation is a different commitment from plugging in a device-level monitor. A product listing may describe the sensors and clamps, but that does not mean every panel offers the same access or fit. Do not open or work inside an energized panel unless you are qualified to do so. Factor in whether you can safely complete the installation or need professional help, as that can shape the total effort and cost of ownership. Smart plugs avoid panel work but cover only compatible plug-in loads. If low-effort setup is your priority, start with outlet monitoring; if you need circuit visibility, plan for the more involved installation path.
Check Platform Support and Local Data Needs
App access, voice-assistant compatibility, Home Assistant support, an open API, and local control are not interchangeable features. A straightforward app may suit someone who wants basic monitoring, while an open API can matter to people building custom dashboards or automations. Local control may appeal if you want core functions to depend less on an internet connection, but verify exactly which functions operate locally. Do not assume a product’s Wi-Fi label means it works with every smart-home platform or automation routine. Check the current compatibility details for your preferred ecosystem before buying. Buyers who do not plan to integrate energy readings into automations may be better served by prioritizing setup and clear reporting over developer-oriented features.
Think About What You Will Do With the Readings
Monitoring is most useful when the data can guide a decision, such as identifying a high-use circuit or checking whether a device’s schedule makes sense. Consider whether you want live readings, longer-term patterns, alerts, or data for automations, and confirm that the product’s app or platform supports the functions you need. A stream of measurements can become noise if you have no plan for interpreting it. For a first project, select one or two loads you want to understand and make sure the monitor can measure them. If you expect to expand later, favor a setup with enough sensor capacity or integration options for that growth. Avoid choosing on feature lists alone; choose around the specific behavior you want the readings to change.
Separate Device-Level Convenience From Panel-Level Coverage
Smart plugs are convenient for appliances that use a standard outlet, and they can be moved or added without modifying a panel. Their limitation is scope: they cannot independently account for hardwired loads or provide a complete view of household electricity use. Panel monitors can cover more of the home, but they take more planning and may require professional installation. A frequent buying error is treating these product types as direct substitutes simply because both report energy data. For a renter or someone tracking a few plug-in devices, outlet monitors may be the practical choice. For household-wide analysis, start with panel monitoring and add plugs only where individual device readings would answer a separate question.
Frequently Asked Questions
Can a smart plug replace a whole-home energy monitor?
No. A smart plug measures the device connected to that outlet, so it can help identify the use of compatible plug-in appliances but will not capture other outlets, hardwired equipment, or total panel activity by itself. A panel monitor is better suited to household-wide or circuit-level readings. If you only want to compare a few appliances, a plug may be enough for that task. If you want a broader household picture, choose a panel monitor or combine panel monitoring with selected plugs.
Do I need a sensor for every circuit in my electrical panel?
Not always. A smaller sensor kit can track the circuits that matter most to your questions, such as major appliances or selected areas of the home. More sensors provide more individual circuit coverage, but they also require a suitable panel layout and installation. Before buying, count the circuits you want to follow and compare that with the kit’s sensor arrangement. If you want detailed readings across most of the panel, a higher-sensor option is a better starting point than assuming a small kit will cover everything.
Can I install a panel-based energy monitor myself?
That depends on your qualifications, the monitor’s installation requirements, and your electrical panel. Panel-mounted sensors involve working around electrical equipment, so buyers who are not qualified should use a licensed electrician rather than treating the job like a plug-in setup. Confirm whether installation requires opening the panel and whether the product fits your panel before purchase. A smart plug avoids that work but only measures the device connected to it. Include installation planning in your choice, not just the monitor’s sensor count.
Should I prioritize Home Assistant or local control?
Prioritize those features if you plan to bring energy readings into custom dashboards, routines, or automations, or if you prefer functions that do not depend entirely on cloud access. Open API support and Home Assistant compatibility can offer more flexibility than a basic app, but the exact functions available may differ. Check whether your desired readings and controls are supported, rather than relying on a general compatibility label. If you only want to review household use in an app, an integration-focused model may add complexity without much benefit. Pick the level of control that matches how you will use the data.
Is a whole-home monitor enough to identify which appliance is using the most power?
A whole-home reading shows overall use, but it may not identify an individual appliance unless the monitor also provides circuit-level data and that appliance has a dedicated circuit. Appliances sharing a circuit can be harder to separate from one another using panel readings alone. A smart plug can provide a more direct reading for a compatible plug-in device. Before buying, check whether your target appliance is plug-in or hardwired and whether it shares a circuit with other loads. For precise device-level comparisons, combine the measurement method with the appliance you want to study.
Conclusion
For the best overall balance of panel coverage, I recommend the Emporia Vue 3 with 16 Circuit Sensors. Buyers who want a lower-complexity device-level starting point should look at the Tapo P115 four-pack, while the Refoss EM16P is the better fit for Home Assistant users who value an open API. For a premium-style choice centered on broader circuit monitoring, compare the 18-circuit Meross model and Siemens Inhab against your panel layout and platform needs before deciding. Beginners who only want to track a few plug-in devices can start with smart plugs; buyers who need household-wide insight should choose a panel monitor and plan for installation. If local control matters more than broad compatibility, the Refoss model with local control deserves a closer look. The right choice comes down to measurement scope first, then installation, sensor coverage, and integration preferences.
