Shelly EM Gen4 – Single-phase Smart Energy Meter, 4th Generation, 2-channel with Current Transformers (CTs), Integrated Relay, Wi-Fi, Bluetooth and Zigbee 3.0, Matter-ready

The Shelly EM Gen4 represents the latest generation in residential and commercial electricity monitoring. Completely redesigned on a 4th-generation hardware architecture, this ultra-compact device can be easily fitted into the sockets behind power points or in electrical distribution boards. The major innovation of the Gen4 series is its native multi-protocol connectivity, integrating Zigbee 3.0 for the first time alongside the classic Wi-Fi and Bluetooth. The device enables high-precision bidirectional measurement across two independent channels using non-contact current clamps (CTs) and includes an internal relay for local control of loads.

Key Features & Technical Advantages

• High-Performance Gen4 Architecture: Equipped with the new 4th-generation processor and expanded flash memory, the module offers instant response times, advanced local processing of consumption data and superior network stability.

• Multi-Protocol Connectivity (Wi-Fi + Zigbee 3.0 + Bluetooth): The device breaks down the barriers of traditional ecosystems. It can operate via Wi-Fi (2.4 GHz) connected directly to a router or be integrated as a mesh device into Zigbee 3.0 networks, reducing Wi-Fi congestion in the home. Bluetooth is used for instant pairing.

• Dual Non-Contact Measurement (2 Channels via CT Clamps): Allows simultaneous monitoring of two completely independent electrical circuits (e.g. household consumption and solar panel output, or the separate consumption of the washing machine and air conditioning) using current transformers (clamps).

• Integrated Control Relay: Features an internal relay capable of switching electrical loads, providing a direct solution for automatically cutting off the power supply in the event of an overload or according to a set schedule, without the need for a secondary relay in the distribution box.

• Local Data Storage (Data Logging): Includes secure internal memory that records minute-by-minute consumption history. Data is saved locally even when the internet or hub connection is completely lost, and is subsequently synchronised.

• Native Matter Compatibility: Thanks to the Gen4 chip, the device is designed to operate directly within the universal Matter standard, facilitating local communication with Home Assistant (via ZHA/Zigbee2MQTT or Wi-Fi), Apple Home, Google Home and Amazon Alexa.

Examples of Applications

1. Photovoltaic Systems (Net-Metering): One terminal measures the energy drawn from the grid, whilst a second measures the inverter’s output, giving you a clear, real-time picture of your home’s energy balance.

2. Consumption Threshold-Based Automation: You can programme a high-power socket to switch off automatically (via the internal relay or by sending a command over the network) if the consumption detected on the main circuit exceeds a certain safety threshold.

Technical Specifications

• Model: Shelly EM Gen4

• Architecture: Shelly Gen4 Platform

• Measurement Type: Single-phase, 2 independent channels via current transformers (CT clamps are selected separately, 50A or 120A)

• Measured Parameters: Active power (W), Energy (Wh), Voltage (V), Current (A)

• Integrated Relay: Yes (1 × relay output for direct control)

• Wireless Connectivity: Wi-Fi 802.11 b/g/n (2.4 GHz), Zigbee 3.0, Bluetooth (for configuration)

• Mains Voltage: 110–240 V AC, 50/60 Hz (Neutral wire required)

• Supported Protocols: Matter, MQTT, HTTP Webhooks, Local API

• Compatibility: Shelly Smart Control, Home Assistant, SmartThings, Alexa, Google Home

Package Contents: 1 × Shelly EM Gen4 Smart Energy Meter, Quick Start Guide and wiring diagrams. (Note: Current transformers must be purchased separately depending on the required capacity).

Why choose the Shelly EM Gen4 from Wifishop?

The launch of the 4th generation brings long-awaited flexibility through the integration of the Zigbee 3.0 protocol alongside Wi-Fi, making the Shelly EM Gen4 the most versatile energy meter on the market. Matter-ready compatibility and the inclusion of an internal relay eliminate compromises regarding space and interoperability, offering a comprehensive solution for monitoring and protecting your electrical network.