Shelly 3EM

Professional 3 phase energy meter

What is 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.


  • No HUB required.
  • Wide range of voltage support.
  • Anti energy theft protection
  • Overconsumption and over energy protection
  • It can be integrated to work with all other Shelly devices.
  • Compatible with Android, iOS, Amazon Alexa, Google Assistant, and home automation servers using MQTT, CoAP, and REST API.
  • Easily make your Arduino project live and usable in your automation project.


Power supply AC 110-230V ±10%, 50/60Hz
Power supply DC No
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
Channels 3 Channel
Operational temperature 0 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/WiFi Protocol 802.11 b/g/n
Radiofrequency 2400 – 2500 MHz
Radio signal power 1mW
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

Wiring diagrams

How to connect

Device pinout


Use cases

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 your electricity consumption

With Shelly 3EM, you can 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 energy that may damage your appliances and machines.


Jimmy James