Shelly EM Gen4

$74.99

Shipping calculated at checkout.

New

In stock

Typically used for:

Energy saving

Contactor control

Power monitoring

Shelly EM Gen4

$74.99

Shipping calculated at checkout.

In stock

Next-gen energy meter featuring Wi-Fi 6, Bluetooth, Zigbee, and Matter, with at least 30 days of local data logs at 1-minute resolution and 16 MB flash memory.

*Shelly EM Gen4 comes with a 50 A clamp included in the pack

Typically used for:

Energy saving

Contactor control

Power monitoring

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Extended Coverage: Beyond the standard warranty
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Key Features

New - Multi-protocol connectivity: Bluetooth 5, Wi-Fi 6, Zigbee
New - Matter-certified: Works with Matter “out of the box.”
New - Upgraded hardware: Powerful new chip with 16 MB flash memory
New - Local data logging: Stores data on device for аt least 30 days of 1 minute data resolution
New - Compatible current transformers: 50 A, 80 A, and 120 A options
Single-phase, two-channel measurement
Supports up to 2 current transformers for contactless metering
Dry contact switch for contactor control
Safety features: Overheating, overvoltage, overcurrent, and overload protection"

Device identification

Device name: Shelly EM Gen4
Device model: S4EM-002CXCEU
Device SSID: ShellyEMG4-XXXXXXXX
BLE model ID: 0x1036

Short description

Shelly EM Gen4 (the Device) is a small form factor smart energy meter using up to 2 current transformers (contactless metering), which allows energy metering the consumption of electric appliances and reporting to a mobile phone, tablet, PC, or home automation system. It can work standalone in a local Wi-Fi network or it can also be operated through cloud home automation services. The Device has internal storage for data allowing for later retrieval. The Device has single dry contact switch for controlling external loads.
Shelly EM Gen4 can be accessed, controlled, and monitored remotely from any place where the User has internet connectivity, as long as the device is connected to a Wi-Fi access point and the Internet.
Shelly EM Gen4 can be retrofitted into standard electrical wall boxes, next to electrical appliances, power sockets, or in other places with limited installation space.
Shelly EM Gen4 has an embedded Web Interface which can be used to monitor, configure, and control the device.
The device has multi-protocol wireless MCU which provide Zigbee and Bluetooth connectivity ensuring a secure connection.
This device is compatible with Matter.

Main features

Compact form factor
Single phase, two channels measurement
Current transformer connection
Dry contact relay for contactor control
Real-time clock
Data logs stored on device for at least 30 days of 1 minute data records
Upgraded with an improved processor and the addition of Zigbee connectivity

Use cases

Power Consumption Monitoring: Monitor the power consumption of connected devices in real-time. This information can be valuable for understanding energy usage patterns and making informed decisions to reduce consumption.
Energy Efficiency Optimization: Identify electrical energy consumption patterns and optimize electricity usage.
Appliance Health Check: Keep track of the power usage of individual appliances to assess their health and performance over time. Sudden spikes or changes in power consumption may indicate issues with the appliance.
Cost Management: With the knowledge of power consumption, you can estimate the cost of running specific devices and manage your electricity expenses more effectively.
Space-Efficient Retrofitting: Integrate the device into standard electrical wall boxes, behind power sockets, light switches, or other locations with limited space.
Remote Monitoring: Shelly EM Gen4 supports publishing data to Shelly cloud or other cloud based data collection and storage systems. This allows you to monitor power consumption even when you're away from home.
Local Monitoring: Like the rest of the Shelly Wi-Fi line of devices Shelly EM Gen4 allows for local only monitoring and automations. Access stored energy consumption records directly from the device UI. Automate locally with rules based on instantaneous power consumption or energy consumer for a period of time.

Main applications

Residential
MDU (Multi Dwelling Units - apartments, condominiums, hotels, etc.)
Light commercial (small office buildings, small retail/restaurant/gas station, etc.)
Government/municipal
University/college
Farming

Simplified internal schematics

Connectivity

Wi-Fi
Bluetooth
Zigbee
Matter

Protocols

Zigbee
MQTT
HTTP
HTTPS
WebSocket
RPC

Safety function

Overheating protection
Overvoltage protection
Overcurrent protection
Overpower protection

Supported load types

User interface

Inputs

Specifications

Quantity	Value
Physical
Size (HxWxD):	37x42x16 mm / 1.46x1.65x0.63 inch
Weight:	26 g / 0.92 oz
Screw terminals max torque:	0.4 Nm / 3.5 lbin
Conductor cross section:	0.5 to 4 mm² / 20 to 11 AWG (solid, stranded, and bootlace ferrules)
Conductor stripped length:	6 to 7 mm / 0.24 to 0.28 in
Mounting:	Wall console
Shell material:	Plastic
Shell color:	White
Connectors color:	Grey (Mouse Grey RAL7005, R(106) G(110) B(106), HEX #6A6E6A, LRV 15.19.)
Environmental
Ambient working temperature:	-20 °C to 40 °C / -5 °F to 105 °F
Humidity:	30 % to 70 % RH
Max. altitude:	2000 m / 6562 ft
Electrical
Power supply voltage AC:	110 - 240 V, 50/60 Hz
Power supply voltage DC:	N/A
Power consumption:	< 1 W
External protection:	2 A, tripping characteristic B or C, 6 kA interrupting rating, Energy limiting class 3
Output circuits ratings
Max switching voltage AC:	240 V
Max switching voltage DC:	N/A
Max. switching current:	2 A
Sensors, meters
Voltmeter (AC):	110 - 240 V
Voltmeter accuracy:	±2 %
Ammeter (AC):	0 - 120 A
Ammeter accuracy:	±2 % (2 - 50 A), ±2 % (1 - 2 A), ±5 % (0 - 1 A)
Compatible current transformers:	CT 50A (included in the package) CT 80A CT 120A
Power and energy meters:	Active and apparent power Active and apparent energy Power factor
No load threshold:	30 VA per phase
Measurement data storage:	At least 30 days of 1 min data resolution
Data export:	CSV for PQ recorded values JSON format export through RPC
Internal-temperature sensor:	Yes
Radio
Wi-Fi
Protocol:	802.11 b/g/n/ax
RF band:	2412 - 2484 МHz
Max. RF power:	< 20 dBm
Range:	Up to 30 m / 100 ft indoors and 50 m / 160 ft outdoors (Depends on local conditions)
Bluetooth
Protocol:	5 (LE)
RF band:	2402 - 2480 MHz
Max. RF power:	< 20 dBm
Range:	Up to 10 m / 33 ft indoors and 30 m / 100 ft outdoors (Depends on local conditions)
Zigbee
Protocol:	802.15.4
Zigbee repeater:	Yes
RF bands:	2405 to 2480 MHz
Max. RF power:	< 20 dBm
Range:	Up to 100 m / 328 ft indoors and 300 meters / 984 ft outdoors (Depends on local conditions)
Microcontroller unit
CPU:	ESP32C6
Flash:	16MB
Firmware capabilities
Schedules:	20
Webhooks (URL actions):	20 with 5 URLs per hook
Scripting:	Yes
MQTT:	Yes

Basic wiring diagrams

Legend

Terminals		Wires
O	Load circuit output terminal	L	Live (110-240 V~) wire
I	Load circuit input terminal	N	Neutral wire
IA	First channel current transformer input	Current transformers
IB	Second channel current transformer input	CTA	First channel current transformer
L	Live (110-240 V~) terminal	CTB	Second channel current transformer
N	Neutral terminal

Shelly Smart Control

Adding the device to the Shelly Smart Control

Components and APIs

Compliance

Printed user guide

Shelly EM Gen4 multilingual printed user and safety guide.pdf

FAQ

What are the differences between the different generations of Shelly products?

Each new generation adds more power, memory, and features:

Gen 1 offers basic control;

Gen 2 (Plus Series, Mini Series, Pro Series) adds Bluetooth, scripting, and better security;

Gen 3 improves performance, adds Matter (starting from firmware version 1.6.0 or newer) and advanced monitoring;

Gen 4 offers multi-protocol connectivity, featuring Wi-Fi 6, Bluetooth, Zigbee, and Matter.

Learn more: https://support.shelly.cloud/en/support/solutions/articles/103000316073-comparison-of-shelly-gen-1-gen-2-and-gen-3-devices?fbclid=IwY2xjawJHTR9leHRuA2FlbQIxMAABHaBfrCc1-eqoghqxTVUgn7QBaaqTBKa_dZyem_FbH6z6WrlrHbWo0p_OTg_aem_ltK1ZvtsjkrpzXAFx7uvhQ

Is it possible to use the device without a hub?

Yes, Shelly devices (except for Wave devices) operate independently without the need for a hub. They connect directly to your Wi-Fi network, and you can control them via the Shelly Smart Control app, web interface, or through integrations with platforms like Google Home, Alexa, Home Assistant and Samsung SmartThings.

Knowledge Base

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View full details

Shelly EM Gen4

Smart Energy Control from Anywhere

Manage your home’s energy use and take control of your consumption. Shelly EM Gen4 helps you track usage in real time, store data locally, and connect easily to any smart home system - all in a compact, easy-to-install design.

Smart Schedules

Automate device actions based on your preferred time settings.

Real-Time Clock

Keeps accurate time to ensure your schedules run precisely.

Advanced Integrations

Supports scripting, webhooks, MQTT, WebSocket, RPC, HTTP, and HTTPS.

Local and Cloud-Based Automation

Enables flexible control through Matter and multi-protocol connectivity."

Solutions

Shelly EM Gen4

Power Consumption Monitoring

Monitor the power consumption of connected devices in real-time. This information can be valuable for understanding energy usage patterns and making informed decisions to reduce consumption.

Appliance Health Check

Monitor the power usage of your appliances to ensure optimal performance and longevity. By tracking individual energy consumption patterns, you can proactively identify potential issues before they become costly problems. Unexpected spikes or shifts in power usage are early warning signs that an appliance may need attention, allowing you to maintain efficiency and avoid downtime.

Heavy load control with contactors

Besides precise power metering, Shelly EM Gen4 allows contactor control of heavy-load appliances such as powerful water heaters, hot tubs, heat pumps, and large kitchen appliances. This way, you can both monitor and control the consumption of larger appliances around your home or facility and maximize your savings.