Shelly EM

WiFi-operated energy meter and contactor control



What is Shelly EM?

WiFi-operated energy meter and contactor control

We developed Shelly ЕМ 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.


  • No HUB required.
  • Internal temperature sensor for overheating protection.
  • Shelly EM can automatically turn off the whole circuit if consumption or energy (prepaid energy option) reaches the set limit.
  • Designed to fit in most standard electrical boxes and switches.
  • 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 2A
Roller shutter mode No
Device temperature protection No
Overload protection No
Power measurement Yes
Channels 2 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 39mm x 36mm x 17 mm

Wiring diagrams

How to connect

Device pinout


Use cases

Detailed info about your electricity consumption

With Shelly EM, 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.


Shelly Power Consumption Alarm Signal

Always be notified and monitor your power consumption with Shelly EM, so your power counter never cuts-out your electricity.

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Shelly EM Auto Toggle Based on Solar Panels Production

Learn how you can use Shelly EM to auto toggle based on the production of your solar panels.

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