The best smart energy gateways depend on whether you want circuit-level electricity data or a hub for connecting smart-home devices. I rank the Emporia Vue 3 as the best overall choice for home energy monitoring, while the Meross 18-Circuit Monitor stands out for Home Assistant users and the Aeotec V3 Hub for broad smart-home protocol support. The main tradeoff is between detailed electrical monitoring, ecosystem flexibility, and a simpler gateway focused on device connectivity. Read on for how these seven options differ and which one fits your setup.
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Key Takeaways
- Energy monitoring and device bridging are different jobs: Emporia, Meross, and SEM-Meter focus on circuit-level electricity data, while SONOFF, Toyanc, Tuya, and Aeotec focus on connecting smart-home devices or protocols.
- Emporia Vue 3 leads for a dedicated home energy monitor: It is the strongest all-around fit in this group for buyers prioritizing household energy visibility over a general-purpose smart-home hub.
- Meross is the clearest fit for Home Assistant users: Its stated Home Assistant support makes it a more direct match for that setup than the other circuit-monitoring picks.
- Aeotec V3 is the hub choice for protocol breadth: Zigbee, Z-Wave, Matter, and SmartThings support give it a different role from the energy monitors, but it does not replace circuit-level measurement.
- Sensor count alone does not settle the choice: Meross lists 18 circuits and SEM-Meter lists 16, but panel fit, installation requirements, app or platform compatibility, and the data you need matter just as much.
| SONOFF Bridge-M Smart Home Hub |  | Best for Matter Bridging | Connectivity: Zigbee, BTHome, eWeLink, Matter | Matter function: Matter Bridge; not a Matter Controller | Home Assistant integration: MQTT | VIEW LATEST PRICE | See Our Full Breakdown |
| Toyanc Multi-Mode Smart Gateway with Zigbee 3.0, Bluetooth Mesh, and Wi-Fi |  | Best for Simple Tuya Setups | Connectivity: Zigbee 3.0, Bluetooth Mesh, Wi-Fi | Wi-Fi frequency: 2.4 GHz | App compatibility: Tuya Smart, Smart Life | VIEW LATEST PRICE | See Our Full Breakdown |
| Aeotec V3 Smart Home Hub – SmartThings, Z-Wave, Zigbee, Matter, Alexa & Google Assistant compatible |  | Best Overall Smart Home Gateway | Connectivity: Ethernet, Wi-Fi, Z-Wave, Zigbee, Matter | Model: V3 – Smart Home Hub (2020) | Model number: GP-AEOHUBV3US | VIEW LATEST PRICE | See Our Full Breakdown |
| Meross Smart Home Energy Monitor, 18-Circuit, with Home Assistant Support |  | Best for Home Assistant Circuit Monitoring | Model: EM16 | Circuit monitoring: 2 main circuits (200A) and 16 branch circuits (60A) | Measurement accuracy: ±2% | VIEW LATEST PRICE | See Our Full Breakdown |
| Emporia Vue 3 Home Energy Monitor |  | Best for Whole-Home Energy Visibility | Model: EMV3A-2P-16 | Monitoring configuration: Whole-home monitor with 16 circuit sensors | Included sensors: Sixteen 50A clamp sensors | VIEW LATEST PRICE | See Our Full Breakdown |
| SEM-Meter Smart Home Energy Monitor with 16 Circuit Sensors |  | Best for Local Home Assistant Energy Monitoring | Sensors: 16 clamp-on sensors, 50A each | Supported electrical systems: Single-phase up to 240VAC line-neutral; split-phase 120/240VAC; three-phase up to 415Y/240VAC; no Delta | Connectivity: 2.4 GHz Wi-Fi; local MQTT with Home Assistant | VIEW LATEST PRICE | See Our Full Breakdown |
| Tuya Zigbee 3.0 and Bluetooth Mesh Smart Home Gateway |  | Best for Tuya Zigbee and Bluetooth Devices | Protocols: Zigbee 3.0 and Bluetooth mesh (SIG) | App compatibility: Tuya Smart / Smart Life | Voice assistant compatibility: Amazon Alexa and Google Home | VIEW LATEST PRICE | See Our Full Breakdown |
| smart energy gateway | Connectivity | Weight |
|---|---|---|
| SONOFF Bridge-M Smart Home Hub | Zigbee, BTHome, eWeLink, Matter | — |
| Toyanc Multi-Mode Smart Gatewa | Zigbee 3.0, Bluetooth Mesh, Wi-Fi | — |
| Aeotec V3 Smart Home Hub | Ethernet, Wi-Fi, Z-Wave, Zigbee, Matter | 1.1 pounds |
| Meross Smart Home Energy Monit | — | — |
| Emporia Vue 3 Home Energy Moni | — | 4.77 pounds |
| SEM-Meter Smart Home Energy Mo | 2.4 GHz Wi-Fi; local MQTT with Home Assistant | 4.05 pounds |
| Tuya Zigbee 3.0 and Bluetooth | — | 1.76 ounces |
More Details on Our Top Picks
SONOFF Bridge-M Smart Home Hub
The SONOFF Bridge-M is a focused pick for connecting compatible Zigbee, BTHome, and eWeLink devices to Matter-compatible platforms such as Apple Home, Alexa, and Google Home. Its Matter Bridge role is narrower than the Aeotec V3 hub: it can expose supported devices to a Matter ecosystem, but it cannot control Matter devices or serve as a Matter controller itself. That distinction matters if you are building a system around newer Matter accessories rather than bringing older devices along.
A local LAN console and MQTT integration give it appeal for Home Assistant users who want access without depending on a cloud service or app. The built-in 90 dB alarm adds a practical security function, though the hub’s value depends on having compatible devices to bridge. Choose it for cross-platform access and local control; skip it if you need a broad, all-protocol controller like the Aeotec.
Pros:- Bridges compatible devices to Alexa, Google Home, and Apple Home
- Local web console operates on the LAN without cloud services or an app
- MQTT integration supports Home Assistant setups
- Built-in 90 dB alarm and mobile alerts can support sensor-based security
Cons:- Cannot add or control Matter devices directly
- Matter support is limited to bridging compatible non-Matter devices
- Its usefulness depends on having devices supported by its specific ecosystems
Best for: Smart-home owners with compatible Zigbee, BTHome, or eWeLink devices who want to expose them to Matter platforms and Home Assistant.
Not ideal for: Buyers building around Matter-native devices or seeking a single hub to control a broad mix of protocols; this unit cannot add Matter devices or act as a Matter controller.
- Connectivity:Zigbee, BTHome, eWeLink, Matter
- Matter function:Matter Bridge; not a Matter Controller
- Home Assistant integration:MQTT
- Web interface:Local LAN console
- Alarm volume:90 dB
- Compatible platforms:Alexa, Google Home, Apple Home
Our verdict“Choose the SONOFF Bridge-M to bring compatible legacy devices into Matter platforms, but pick the Aeotec V3 if you need a broader device controller.”
Toyanc Multi-Mode Smart Gateway with Zigbee 3.0, Bluetooth Mesh, and Wi-Fi
The Toyanc gateway suits buyers who want a compact route into Tuya Smart or Smart Life rather than a more customizable hub. It combines Zigbee 3.0, Bluetooth Mesh, and Wi-Fi, then brings compatible sensors, plugs, lights, switches, and curtain motors into one app. Compared with the SONOFF Bridge-M, its focus is straightforward app-based control and local automation, not Matter bridging or MQTT-based Home Assistant integration.
Local automations may keep running during an internet outage, which is useful for routines that should not rely on remote services. Setup has a clear network constraint: the gateway needs 2.4 GHz Wi-Fi, and supported-device compatibility is not universal. The USB-powered compact design is convenient, but this is not the best fit for someone seeking broad protocol flexibility or a platform-independent system. Choose it for a compatible Tuya household; the Aeotec V3 is the more versatile alternative.
Pros:- Combines Zigbee 3.0, Bluetooth Mesh, and Wi-Fi connectivity
- Supports local automations that can continue without internet access
- Works with Tuya Smart and Smart Life apps plus Alexa and Google Home voice control
- Compact form factor uses a 5V/1A USB power source
Cons:- Initial setup requires 2.4 GHz Wi-Fi and does not support 5 GHz
- Device compatibility is limited to supported products and ecosystems
- Lacks the stated Matter and Home Assistant integration options offered by other picks
Best for: Buyers assembling a small Tuya or Smart Life system with compatible Zigbee, Bluetooth, and Wi-Fi devices, Alexa or Google Home control, and 2.4 GHz Wi-Fi.
Not ideal for: Home Assistant users, households with only 5 GHz Wi-Fi, or buyers who need Matter support and wider cross-platform device control.
- Connectivity:Zigbee 3.0, Bluetooth Mesh, Wi-Fi
- Wi-Fi frequency:2.4 GHz
- App compatibility:Tuya Smart, Smart Life
- Voice assistant compatibility:Amazon Alexa, Google Home
- Power:5V/1A USB
- Supported device types:Compatible sensors, smart plugs, switch panels, light bulbs, curtain motors
Our verdict“Pick the Toyanc gateway for a compact Tuya-based setup with local routines, but choose the Aeotec V3 for broader protocol support.”
Aeotec V3 Smart Home Hub – SmartThings, Z-Wave, Zigbee, Matter, Alexa & Google Assistant compatible
The Aeotec V3 earns the broadest smart-home gateway role here by combining Matter, Z-Wave, Zigbee, Wi-Fi, and Ethernet with SmartThings automation. That makes it a stronger choice for a mixed-device home than the SONOFF Bridge-M, which bridges selected devices to Matter but cannot act as a Matter controller. Local automation can also reduce delays and dependence on cloud routines, while Ethernet offers a wired placement option the Toyanc gateway does not list.
The breadth comes with limits: this model is designed for the North American market, and its Z-Wave Plus support is specific to the V3 model. It is not an energy monitor, so buyers focused on circuit-level electricity data should look to the Meross EM16 or Emporia Vue 3 instead. For a general-purpose gateway that can tie multiple protocols and voice assistants together, it is the most flexible option in this group; regional fit and device compatibility still need checking.
Pros:- Supports Matter, Z-Wave, Zigbee, and Wi-Fi in one hub
- Local automation can provide faster responses than cloud-only routines
- Offers Ethernet and Wi-Fi connectivity for flexible installation
- Integrates with SmartThings, Alexa, and Google Assistant
Cons:- Designed for the North American market and may not work optimally elsewhere
- Z-Wave Plus support is limited to the V3 model
- Does not provide the circuit-level energy measurements offered by the Meross EM16 and Emporia Vue 3
Best for: North American SmartThings households combining Z-Wave, Zigbee, Matter, and Wi-Fi devices, especially those who want local automation and Ethernet or Wi-Fi placement.
Not ideal for: Buyers outside North America, people seeking circuit-level energy monitoring, or households that need confirmed Z-Wave Plus support beyond the V3 model.
- Connectivity:Ethernet, Wi-Fi, Z-Wave, Zigbee, Matter
- Model:V3 – Smart Home Hub (2020)
- Model number:GP-AEOHUBV3US
- Frequency:908.42 MHz
- Controller compatibility:Amazon Alexa, Android, Google Assistant, Ring, SmartThings, iOS
- Weight:1.1 pounds
- Warranty:1 year
Our verdict“Choose the Aeotec V3 for broad, local control of a mixed-protocol North American smart home, not for energy-use monitoring.”
Meross Smart Home Energy Monitor, 18-Circuit, with Home Assistant Support
The Meross EM16 is the most detailed energy gateway in this group for buyers who want circuit-by-circuit visibility and local data access. It monitors two main circuits plus up to 16 branch circuits, with power, voltage, current, and power-factor readings. Compared with the Emporia Vue 3, its standout advantage is stated support for Home Assistant, an Open API, web control, and up to five years of data retention—useful for users who want to build their own dashboards or review longer-term trends.
Solar surplus detection, alerts, and data exports add practical ways to act on energy readings, while clamp-on sensing avoids inserting a monitor into each circuit. The tradeoff is electrical-system fit: it supports specified US configurations but not Delta systems. Installation still involves work inside an electrical panel, so it is not a casual plug-in gateway. Pick it for granular, integration-friendly monitoring; choose the Aeotec V3 for device control rather than energy measurement.
Pros:- Monitors two main circuits and up to 16 branch circuits
- Supports Home Assistant, Open API, and web control
- Stores data locally for up to five years and supports exports and alerts
- Solar surplus detection and clamp-on sensing support energy analysis
Cons:- Not compatible with Delta electrical systems
- Electrical compatibility is limited to the specified system configurations
- Panel installation may require electrical expertise
Best for: Home Assistant users with a supported US electrical system who want long-term local data, solar surplus detection, and readings across many branch circuits.
Not ideal for: Households with Delta wiring or electrical systems outside the listed configurations, and buyers seeking a simple consumer smart-home controller rather than a panel monitor.
- Model:EM16
- Circuit monitoring:2 main circuits (200A) and 16 branch circuits (60A)
- Measurement accuracy:±2%
- Electrical system compatibility:Single-phase 2-wire, split-phase 3-wire, and 3-phase 4-wire Wye with earthed TN or TT neutral; not compatible with Delta
- Integrations and controls:Home Assistant, Open API, Web Control
- Data retention:Up to 5 years
- Installation:Clamp-on
- Certification and warranty:ETL-certified; compliant with UL 61010 testing standard; 2-year warranty
Our verdict“Choose the Meross EM16 for detailed, long-retention circuit monitoring and Home Assistant access if your electrical system is supported.”
Emporia Vue 3 Home Energy Monitor
The Emporia Vue 3 is aimed at households that want a clear view of whole-home use, solar production, and individual circuits from one monitoring system. Its included sixteen 50A clamp sensors make it a substantial circuit-monitoring package, while the app provides real-time data and supports solar and net metering. Compared with the Meross EM16, the Vue 3 emphasizes app-based tracking and automated time-of-use management; Meross is the stronger listed option for Home Assistant integration and long-term local data retention.
UL and CE listings are useful safety credentials, and cloud data can be exported and retained indefinitely at minute and hour intervals. The main limitation is the difference between live detail and history: one-second data is retained for only three hours, and longer records depend on active app use. A separate 200A sensor is also needed for higher-capacity circuits. Choose it for accessible whole-home and solar tracking, not if long-term local storage is your priority.
Pros:- Includes sixteen 50A clamp sensors for circuit monitoring
- Provides real-time energy data and supports solar and net metering
- Supports automated time-of-use management through the app
- UL and CE listed, with cloud data export and longer-interval retention
Cons:- One-second data is retained for only three hours
- Longer data history depends on active app use and cloud export
- A separate 200A sensor is needed for higher-capacity circuits
Best for: Homeowners who want app-based whole-home and circuit-level energy tracking, solar or net-metering visibility, and time-of-use management.
Not ideal for: Buyers who need long-term local data retention, Home Assistant support, or monitoring of higher-capacity circuits without adding a 200A sensor.
- Model:EMV3A-2P-16
- Monitoring configuration:Whole-home monitor with 16 circuit sensors
- Included sensors:Sixteen 50A clamp sensors
- Energy features:Real-time monitoring, solar and net metering support, time-of-use management
- Data handling:Cloud export; indefinite retention at minute and hour intervals; one-second data retained for three hours
- Certification:UL and CE
- Dimensions:10 × 5 × 5 inches
- Weight:4.77 pounds
Our verdict“Choose the Emporia Vue 3 for app-led whole-home and solar tracking with many included circuit sensors, but favor Meross for Home Assistant and long-term local data.”
SEM-Meter Smart Home Energy Monitor with 16 Circuit Sensors
The SEM-Meter is the stronger fit for buyers who want detailed circuit-level energy data and a route to local control. Its 16 included 50A clamp-on sensors can track individual circuits, while customizable time-of-use rates help turn readings into estimated costs. Unlike the Tuya Zigbee and Bluetooth gateway, this is an energy monitor, not a general-purpose device hub; it focuses on understanding household consumption rather than automating lights and sensors.
Its local MQTT support with Home Assistant is a meaningful advantage for people who want monitoring without cloud access. The tradeoffs are installation compatibility and network requirements: it does not support Delta three-phase systems, some busbar-only panels need separate flexible sensors, and app access uses 2.4 GHz Wi-Fi. Choose the Meross 18-Circuit monitor instead if its extra circuit capacity better matches your panel; the SEM-Meter is a compelling alternative for local MQTT use.
Pros:- Includes 16 clamp-on sensors rated at 50A each
- Tracks real-time circuit usage and costs with customizable time-of-use rates
- Supports local MQTT operation with Home Assistant without cloud access
- Offers permanent day, month, and year data exports
Cons:- Does not support Delta three-phase electrical systems
- Busbar-only panels may require separately purchased flexible sensors
- App connectivity requires a 2.4 GHz Wi-Fi network
Best for: Home Assistant users who want local, circuit-by-circuit energy monitoring, cost tracking, and support for up to 16 circuits.
Not ideal for: Households with Delta three-phase service, panels accessible only by busbars without separate flexible sensors, or buyers seeking a general smart-device gateway.
- Sensors:16 clamp-on sensors, 50A each
- Supported electrical systems:Single-phase up to 240VAC line-neutral; split-phase 120/240VAC; three-phase up to 415Y/240VAC; no Delta
- Connectivity:2.4 GHz Wi-Fi; local MQTT with Home Assistant
- Accuracy:1%
- Data history:Hourly exports valid for 90 days; day, month, and year exports permanent
- Dimensions:3.1 x 1.2 x 4.18 inches
- Weight:4.05 pounds
- Warranty:1 year
Our verdict“Choose the SEM-Meter if local Home Assistant access and 16-circuit energy tracking matter more than broad smart-device control.”
Tuya Zigbee 3.0 and Bluetooth Mesh Smart Home Gateway
This compact gateway suits buyers building around Tuya Smart or Smart Life devices. It bridges compatible Zigbee 3.0 and Bluetooth mesh products to a 2.4 GHz network, enabling app-based remote control, group control, and automation. Support for up to 128 compatible devices gives a growing Tuya setup room to expand, while Alexa and Google Home compatibility adds voice control.
The main limitation is its closed compatibility lane: it is specified for Tuya and Smart Life devices, not as a broad hub for mixed ecosystems. Compared with the Aeotec V3, which supports a wider range of protocols and platforms, this gateway is much narrower; it also does not monitor household electricity use like the SEM-Meter. That focus can be a plus if your devices already use Tuya, but buyers should check device compatibility before building around it. A 2.4 GHz network is required, and it offers no stated energy-monitoring functions.
Pros:- Combines Zigbee 3.0 and Bluetooth mesh in one gateway
- Supports app-based remote control, group control, and automation
- Works with Amazon Alexa and Google Home voice commands
- Supports up to 128 compatible devices
Cons:- Compatibility is limited to Tuya and Smart Life devices
- Requires a 2.4 GHz network
- Does not provide household energy monitoring
Best for: Tuya Smart or Smart Life users who need one small gateway for compatible Zigbee and Bluetooth mesh devices, app automations, and voice commands.
Not ideal for: Buyers mixing brands or seeking a broad hub with Z-Wave, Matter, or household energy monitoring; its stated compatibility is limited to Tuya and Smart Life devices.
- Protocols:Zigbee 3.0 and Bluetooth mesh (SIG)
- App compatibility:Tuya Smart / Smart Life
- Voice assistant compatibility:Amazon Alexa and Google Home
- Network:2.4 GHz
- Maximum supported devices:128 compatible devices
- Compatibility limitation:Tuya / Smart Life devices only
- Dimensions:1.93 x 1.93 x 0.51 inches
- Weight:1.76 ounces
Our verdict“Pick this gateway for a Tuya-centered Zigbee and Bluetooth setup, but choose a broader hub if you need cross-brand compatibility.”
How We Picked
I ranked these products by how directly they serve a buyer searching for a smart energy gateway: access to useful home energy information, support for the intended devices or platforms, and clarity about the role each unit plays. I gave the highest priority to dedicated circuit-level monitors for energy-focused use, then weighed stated integration options, monitoring scope, and the practical fit for different households. For hub products, I focused on protocol compatibility and the value of adding device connectivity rather than treating them as energy meters.
The ranking reflects the distinctions visible in the supplied product details, not lab measurements or claims of hands-on testing. A larger circuit count can help cover more loads, but it does not establish panel compatibility or measurement quality on its own. I also weighed setup and ecosystem tradeoffs: a dedicated monitor is a better fit for energy data, while a multi-protocol hub is more useful when device interoperability is the primary goal. Products with limited details are positioned more cautiously because buyers have less information to verify before choosing.
Factors to Consider When Choosing Best Smart Energy Gateways
Before choosing a gateway, decide what you need it to measure or connect. These products span two categories that can sound similar in a search: electrical monitors that use circuit sensors and smart-home hubs that bridge device protocols. The factors below help avoid buying a capable device that solves the wrong problem.
Decide Whether You Need Energy Data or Device Connectivity
Start by naming the outcome you want: tracking electricity use by circuit, or connecting devices that use Zigbee, Bluetooth Mesh, Z-Wave, or another protocol. A hub can coordinate supported smart devices without measuring the electricity used by each home circuit. A circuit monitor can show electrical usage without serving as a general bridge for every smart-home device. Buyers sometimes assume a product called a gateway performs both jobs, but the lineup here shows that the label covers distinct functions. If you want both, check whether one product explicitly supports both tasks or plan for separate equipment. This distinction should guide the shortlist before brand or feature count does.
Check Electrical Panel Fit Before Choosing Circuit Sensors
For a circuit-level monitor, confirm that the sensor design and installation method suit your electrical panel before focusing on the number of circuits. Circuit count indicates potential monitoring coverage, not guaranteed compatibility with every panel or wiring layout. Think through which loads matter most: whole-home totals, major appliances, or a broad set of individual circuits. A smaller sensor set may cover the high-use circuits that inform your decisions, while a larger set may be useful when you want wider visibility. Review the manufacturer’s installation guidance and seek a qualified electrician if the panel work is outside your skills. Skipping this check can turn an attractive feature list into an unsuitable purchase.
Match the Gateway to Your Smart-Home Platform
Write down the platforms and devices already in your home, then verify that the gateway supports the specific connections you need. Protocol names alone do not guarantee that every device will pair or expose every feature through a chosen app. Home Assistant users may value explicit integration support, while SmartThings households may favor a hub designed around that ecosystem. Matter support can be useful for cross-platform planning, but it does not make older devices compatible unless the gateway and device support the required connection path. Check whether local control, cloud access, or an account requirement matters for your setup. This quick compatibility check can save more frustration than choosing the hub with the longest protocol list.
Choose Sensor Coverage Based on the Decisions You Want to Make
More monitored circuits can provide a fuller view, but the added data is useful only if you plan to act on it. Decide whether you want to find high-use appliances, compare major loads, or monitor many individual circuits over time. A monitor with broad sensor coverage may suit a complex household, while a more focused setup can be easier to interpret and maintain. Check how the system presents historical data and whether it separates the loads you care about in a useful way. Do not treat a circuit count as a substitute for knowing which circuits you will actually monitor. A clear monitoring plan helps prevent unused sensors and confusing dashboards.
Account for Setup, Data Access, and Ongoing Use
Installation is only one part of ownership; also check how you will view, export, and keep using the data. App requirements, cloud dependence, integration options, and update practices can shape whether the system fits your habits. If you prefer a unified automation setup, confirm that the gateway shares the measurements or device states with your chosen platform. If you want a simple view of household use, a standalone app may be enough, but verify its features before buying. Think about who will install the equipment and who will interpret the readings afterward. A system that is easy to access and maintain is more useful than one with features that remain unused.
Frequently Asked Questions
Can a smart-home hub measure electricity use by circuit?
Not by default. A hub such as the Aeotec V3 is intended to connect compatible smart-home devices and protocols, while a circuit energy monitor uses electrical sensors to measure usage at the panel. A hub may display data from a compatible meter if the relevant integration is supported, but that does not make the hub itself a circuit monitor. Check the product documentation for explicit circuit measurement and sensor support. If circuit-by-circuit data is your goal, start with a dedicated energy monitor.
Which option is the better fit for Home Assistant?
Meross is the most direct match in this roundup because its product details explicitly mention Home Assistant support. That makes it a natural starting point for buyers who want circuit-level energy data in that platform. Still, verify which data points and controls are exposed, and whether the integration method suits your preferences. A product’s general smart-home compatibility does not guarantee a complete Home Assistant integration. If you are choosing a hub rather than a monitor, check the exact device and protocol support separately.
Should I pick a 16-circuit or 18-circuit energy monitor?
Choose based on the circuits you want to track and the fit of the sensors in your panel, not the number alone. Meross lists 18 circuits and SEM-Meter lists 16, but the supplied details do not establish that either will fit every panel or provide identical data features. Map the loads you care about and check how the product counts circuits and handles its sensors. If you only need to follow a few major appliances, the extra capacity may not change your decision. Confirm installation requirements before buying either model.
Do I need a dedicated energy monitor if I already own a smart-home gateway?
Only if you want electrical measurements that the existing gateway does not provide. Smart plugs can estimate or report the use of individual plugged-in devices, but they do not necessarily cover hardwired loads or give a complete panel-level view. A dedicated monitor can fill that gap by tracking circuits, subject to its sensor and installation requirements. First check whether your current hub can accept data from a compatible energy monitor. Buying a second hub will not automatically add circuit measurements.
When is it worth choosing a multi-protocol hub over a dedicated energy monitor?
A multi-protocol hub makes more sense when your main problem is connecting devices across different smart-home standards. The Aeotec V3 is the standout in this group for buyers prioritizing its stated Zigbee, Z-Wave, Matter, and SmartThings compatibility. It is not a replacement for an energy monitor if you need circuit-level electricity data. If you already have a working hub and your goal is to understand energy use, a dedicated monitor is the more relevant purchase. Choose by the job you need done, rather than by the broadest feature list.
Conclusion
For most buyers focused on household energy visibility, I recommend the Emporia Vue 3 as the best overall pick in this lineup. The Meross 18-Circuit Monitor is the best value in functional terms for buyers who specifically want its broader stated circuit coverage and Home Assistant support, while the Aeotec V3 is the best premium-style hub choice for a household prioritizing multiple smart-home protocols over direct energy measurement. Beginners should first decide whether they want an energy monitor or a device hub; for a straightforward energy-monitoring goal, the Emporia is the clearest starting point here. Choose SEM-Meter if its 16-sensor approach fits your planned coverage, and pick SONOFF, Toyanc, or Tuya only after confirming their supported devices and platform fit. The key is to match the product to the job: measure electricity with a dedicated monitor, or bridge smart-home devices with a gateway.
