Professional 3-phase energy meter
The perfect solution for manufacturers

Shelly 3EM


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.

Monophase systems

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

Why Shelly 3EM

The professional 3-phase energy meter.
Shelly 3EM can calculate 2-way consumption: produced and used energy for each of the three phases. The device can be configured to measure three separate points of a mono-phase electrical system and measure each of them separately.

Connect in a minute & control it all

Shelly 3EM has integrated relay output which can be used for contactor control. Real-time and historical information about the efficiency of the 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

We developed Shelly 3EM 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. All data gets stored in the cloud at incrementing intervals.

The perfect solution for

Shelly 3EM can do all the work for you. The 3-phase energy meter can calculate energy cost for production, notify you if a machine is powered on during non-working hours, measure the real working time of each machine and allows remote On/Off control for power optimization.

Full protection

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

Оptimize energy usage

Ever wanted to live sustainаbly and save energy, money, and CO2? With Shelly 3EM, you can monitor the consumption оf each circuit, appliance, or of your whole home to optimize energy usage. In case you have solar panels or wind turbines, you can be aware how much energy was produced and make savings effortless.

Detailed info about electricity consumption

Having more detailed information about electricity consumption at your manufacturing facility is crucial for the optimization of overall production costs and idle power. View the quality of your electricity network regarding active power, reactive power, voltage, and power factor. Monitor your facility or home to avoid additional expenses or drastic drops in voltage that may damage your appliances and machines.


One application countless possibilities

With the best cloud service in the world, user-friendly interface, scenes, bulk control, and much more, the Shelly Cloud application allows you to control your home from anywhere. Each Shelly can be integrated and works with all other Shelly devices in the Shelly app.


For Developers

Shelly 3EM comes with a programming/debug header that can be used for flashing alternative firmware to the device. It has ESP8266 inside, with 4MB flash. A USB-to-UART adapter is needed as well as a reliable 3.3V power supply with at least 350 mA drive capability.

Device pinout ›

Visit our REST API for developers ›