Shelly EM Gen3

What is Shelly EM Gen3?

Gain real-time insights into the power consumption of your connected devices with Shelly EM Gen3. By monitoring the energy usage as it happens, you can uncover patterns that reveal opportunities for efficiency.

 

  • Wi-Fi and Bluetooth connectivity
  • Single phase, two channels measurment
  • 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

*Shelly EM Gen3 comes with a 50 A clamp included in the pack

 

VIEW SPECIFICATIONS  SHELLY MOBILE APP

Features

Wi-Fi and Bluetooth connectivity

Connect Shelly ЕМ Gen3 to your Wi-Fi network. No HUB required! Quick inclusion via Bluetooth or use it as a Bluetooth gateway.

Current transformers connection

Connect up to 2 current transformers. No need for extra wiring!

Dry contact switch

For contactor control of heavier loads.

Local data storage

Data logs stored on device for up to 10 days in 1-minute intervals. When connected to the cloud, data logs go back to 365 days.

Smart Scenes

Set custom scenes by combining Shelly EM Gen3 with your other Shelly devices to control energy use.

Scripting

Fully supports scripting, allowing you local control and custom functionalities.

Use Cases

Total power monitoring

Total power monitoring

Know how much energy your home consumes with Shelly EM Gen3! The perfect solution for one-phase homes, Shelly EM Gen3 can make a large difference in your savings by constantly monitoring the overall power in your breaker box and giving you immediate control over your current consumption. Connect a contactor to Shelly EM Gen3 and save energy by automatically switching off non-essential appliances.
Heavy load control with contactors

Heavy load control with contactors

Besides precise power metering, Shelly EM Gen3 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.
Appliance Health Check

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.

Gen3 Series Features

On the Road to Matter

Each Gen3 device is engineered to be upgradable to Matter. The doubled memory, compared to Plus series, guarantees a smooth update process, paving the way for new smart capabilities and integrations. *Dependent on the extent of Matter's functionalities support.

More Memory, More Power

The Gen3 series ensures the quality and reliability of our devices by using our own powerful Shelly chip. Boasting 8MB of memory, this dramatically improves device performance and efficiency. This significant increase in memory not only guarantees smoother and faster operation but also equips the Gen3 series for the introduction of new capabilities.

Unified Control with Virtual Components

The Gen3 Series introduces “virtual components, transforming how you manage and control 3rd party devices. Within the Shelly Smart Control app, you can now create virtual devices, integrating non-Shelly products into a unified control system. This feature provides streamlined control of all your smart devices, regardless of brand, from a single interface.

CAUTION

Installation of certain Shelly devices must be done by a qualified electrician or authorised installer.

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Diagrams

WIRING

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

SPECIFICATIONS

Physical

Size (HxWxD):

37x42x16 mm / 1.46x1.65x0.63 inch

Weight:

  • EM Gen3 - 23 g / 0.81 oz

  • CT 50A - 50 g / 1.76 oz

Screw terminals 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 color:

  • White

  • Charcoal gray

Connectors color:

Black

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:

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

Output circuits ratings

Max. switching voltage:

240 V~

Max. switching current:

2 A/240 V~

Sensors, meters

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 and 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

Radio

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 and 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 and 30 m / 100 ft outdoors
(Depends on local conditions)

Microcontroller unit

CPU:

ESP-Shelly-C38F

Flash:

8 MB

Firmware capabilities

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)

Download the Shelly Cloud app for Android and iOS

Download Shelly Cloud App on Apple App StoreDownload Shelly Cloud App on Google Play store

Videos

Shelly EM Gen3 – Installation video