Shelly EM Gen3

The Shelly EM Gen3 is a small form factor smart energy meter able to utilise up to 2 current transformers for contactless metering (one 50A clamp is included), 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 a single dry contact switch for controlling external loads.

The Shelly EM Gen3 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. It can be retrofitted into some electrical wall boxes, next to electrical appliances, power sockets, or in other places with limited installation space. It also has an embedded web interface which can be used to monitor, configure, and control the device.

You can monitor power monitoring data via the Shelly smart home ecosystem, including the Shelly Smart Control app – or link it with a popular home automation software such as Home Assistant via a Raspberry Pi!

Note: You may require a neutral wire to use this product. Please research the device and your home wiring (safely, see below) before purchasing.

⚠️Caution – Read Before Buying⚠️

• Before beginning the installation, please read this guide and any other documents accompanying the device carefully and completely
• Danger of electrocution. The mounting/installation of the device should be performed by a qualified person (electrician)
• Failure to follow the installation procedures could lead to malfunction, danger to your health and life, violation of the law or refusal of legal and/or commercial guarantee (if any)
• Allterco Robotics (makers of Shelly products) and Mann Enterprises LTD are not responsible for any loss or damage in case of incorrect installation or improper operation of this device due to failure to follow the user and safety instructions in the printed guide accompanying this product (also available in the resources section below)
• Do not connect the device to appliances exceeding the given max load.
• Use the device only with a power grid and appliances which comply with all applicable regulations. Short circuit in the power grid or any appliance connected to the device may damage the device.
• Before starting, wire check that the breakers are turned off and there is no voltage on their terminals. This can be done with a phase meter or multimeter. When you are sure that there is no voltage, you can start wiring the cables.

Features

• Wi-Fi and Bluetooth connectivity
• Single phase, two channel measurement
• Up to 2 current transformers connection (contactless metering)
• Dry contact switch for contactor control
• Shelly chip with 8 MB memory
• Local data logs stored on device for up to 10 days in 1-minute intervals
• Smart schedules
• Real-time clock
• Supports scripting, webhooks, MQTT, WebSocket, HTTP, RPC protocols
• Wide integration into smart automation systems

Specifications

Size (HxWxD)	37x42x16 mm / 1.46×1.65×0.63 inch
Weight	EM Gen3 – 23 g / 0.81 oz
	CT 50A – 50 g / 1.76 oz
Screw terminal max torque	0.4 Nm / 3.5 lbin
Conductor cross-section	0.2 to 2.5 mm² / 24 to 14 AWG (solid, stranded, and bootlace ferrules)
Conductor stripped length	6 to 7 mm / 0.24 to 0.28 in
Mounting	Wall console, Electrical cabinet
Shell material	Plastic
Shell colour	White / Charcoal gray
Connectors colour	Black
Ambient working temperature	-20 °C to 40 °C / -5 °F to 105 °F
Humidity	30 % to 70 % RH
Max. altitude	2000 m / 6562 ft
Power supply	110 – 240 V~ 50/60 Hz
Power consumption	< 1.2 W
Neutral not needed	Yes or No
External protection	2 A, tripping characteristic B or C,
	6 kA interrupting rating,
	Energy limiting class 3
Max. switching voltage	240 V~
Max. switching current	2 A/240 V~
Voltmeter (AC)	110-240 V~ 50/60 Hz
Voltmeter accuracy	±2%
Ammeter (AC)	0 – 80A
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
Power and energy meters	Active and apparent power
	Active and apparent energy
	Power factor
	Fundamental active Fundamental reactive energy
Channel-to-channel calibration minimum load	500 W
No load threshold	30 VA per channel
Measurement data storage	At least 10 days of 1 min data resolution
Data export	CSV for PQ recorded values
	JSON format export through RPC
Internal-temperature sensor	Yes
Wi-Fi
Protocol	802.11 b/g/n
RF band	2412 – 2472 МHz
Max. RF power	< 20 dBm
Range	Up to 30 m / 100 ft indoors Up to 50 m / 160 ft outdoors (Depends on local conditions)
Bluetooth
Protocol	4.2
RF band	2402 – 2480 MHz
Max. RF power	< 4 dBm
Range	Up to 10 m / 33 ft indoors Up to 30 m / 100 ft outdoors (Depends on local conditions)
CPU	ESP-Shelly-C38F
Flash	8 MB
Schedules	Yes
Webhooks (URL actions)	20 with 5 URLs per hook
Scripting	Yes
MQTT	Yes
Encryption	Yes (Transport level)
Authentication	Yes (Application and transport level)

Resources

• Shelly Product Documentation
• Printed User Guide (as found within the package)
• Components and APIs
• Device Identification
  • Device name: Shelly EM Gen3
  • Device model: S3EM-002CXCEU
  • Device SSID: ShellyEMG3-XXXXXXXXXXXX
  • BLE model ID: 0x1027
• EAN: 3800235261873

Handy Shelly Resources

• Shelly Cloud
• Shelly App
  • Apple App Store
  • Google Play
  • Huawei AppGallery
• Home Assistant Shelly Integration
• Shelly Community Forum
• Shelly Facebook Support Group
• Shelly Knowledgebase
• Shelly Device Finder (easy-to-use software to find Shelly devices in the local network)
• Shelly Developer API

Package Contents

• 1x Shelly EM Gen3
• 1x 50A Clamp
• 1x User Guide