Shelly 3EM

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The professional 3-Phase energy meter for commercial or residential users.

The Shelly 3EM has an integrated relay output which can be used for contactor control and real-time historical information about the efficiency or your solar or wind energy system and how much energy has been produced.  Control your monthly expenses by saving on money and energy!

365 Day Built-in Energy History

Shelly 3EM was developed to allow you to monitor the status and history, as well as the current and past electrical power consumption for the day, week, month, or year.  Shelly 3EM exports all data in CSV format in 5 minute intervals.  The information can help for analysis and detailed statistics.  A data gets stored in the cloud at incrementing intervals.

Full Protection

Shelly 3EM will automatically shut down and notify you when the defined consumption limit is exceeded.

Optimize Energy Usage

 Live sustainably and save energy, money, and CO2.  With Shelly 3EM you can monitor the consumption of each circuit, appliance, or your whole house to optimize energy usage.  If you have solar panels or wind turbines, you can be aware of how much energy was produced and make savings effortless.

Wireless Shelly 3EM can be connected to any Wi-Fi network or can operate as an Access Point.

Control remotely Control Shelly 3EM directly from your smartphone or tablet and manage its output from the Shelly Cloud app, MQTT, or Rest API.

Highly compatible Shelly 3EM is compatible with both Android and iOS.

Overconsumption and over energy protection Shelly 3EM will automatically turn off the whole circuit if consumption or energy reaches the set limit.

Sunrise/Sunset schedules Automatically follow the sun and turn Shelly 3EM ON/OFF based on the sunrise and sunset hours

Weekly schedules Choose a time and create custom daily schedules for your Shelly 3EM.

Anti energy theft protection Monitor real-time energy consumption for each phase and compare it to the neutral to know if someone is stealing electricity.

Single-Phase systems Shelly 3ЕМ can also monitor monophase electrical systems with up to 3 points simultaneously.


Monitor the consumption of any home appliances, electric circuit and office equipment (lights, power lines, security systems, heating and cooling, etc.) individually. The consumption of your whole home or generated electricity from solar panels with the only one of its kind WiFi-operated Energy Meter with contactor control functionality in the world.

Shelly 3EM

  • three independent measuring channels up to 120A each
  • one contactor control (or load up to 10A)
  • 365 days of internal memory in case Wi-Fi is not available
  • voltage measurement and configurable alarm reporting
  • Included 3x Current Transformers 120A


Power supply AC 110-230V ±10%, 50/60Hz
Power supply DC No
Channels 3 Channel
Contactor Control Yes - max 10A
Roller shutter mode No
Device temperature protection No
Overload protection No
Power measurement Yes
In Box Included 3x Current Transformers 120A
Operational temperature 0°C to + 40 °C
Device power consumption < 1 W
Intelligent On/Off Yes
Local and remote control Yes
Sunrise/Sunset Yes
Weekly Schedule Yes
UL Listed option No
Wireless Yes
Wi-Fi Protocol 802.11 b/g/n
Wi-Fi Radio frequency 2412 - 2484 MHz
Wi-Fi Radio signal power 1mW
Wi-Fi Range up to 50 m outdoors and up to 30 m indoors (depending on the building materials)
Size 73 mm x 57 mm x 22 mm
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