Shelly EM single phase energy meter with contactor control

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Shelly EM is Shelly’s compact size single phase power meter, with max 2 x 120A capacity. With Shelly EM you can also measure how much energy your solar system produces and the power consumption ath the same time.

SKU: ALL-REL-EM Category:
EAN: 3809511202104


Shelly EM is Shelly’s single phase power meter for recommended for both home and corporate use. Shelly ЕМ can monitor energy consumption in real time in 2 points simultaneously (up to 120A each). With Shelly EM you can also measure how much energy your solar system produces and the power consumption ath the same time.

It can automatically turn off the whole circuit if consumption or energy (pre-paid energy option) reaches the set limit and has integrated relay output made for contactor control.


  • 110-230V ±10, 50/60Hz AC, Shelly EM is compatible with all major international voltage standards.
  • Small size: 39x36x17mm
  • equipped with built-in Wi-Fi
  • precise power meter with 1% accuracy, 50A and 120A current transformers are available, sold separately
  • MQTT, rest API support
  • Monthly expenses
  • 365 days consumption history stored on the device
  • User friendly charts
  • Detailed report downloadable in csv
  • Relay output for contactor control: 2 A / 230 VAC / 50/60 Hz



  • 2 x consumption (W),
  • 1 x current (A)
  • 1 x voltage (V)
  • 2 x energy (Wh), consumed energy from power grid
  • 2 x energy (Wh), generated energy from a photovoltaic system
  • 2 x reactive power (Var)


WiFi connection:

  • Shelly EM – similarly to other Shelly devices – has a built-in web server, that is, can work in Access Point mode.
  • It can connect to home or corporate WiFi network and be managed from the free Shelly Cloud app (available for Android and iOS)
  • No need for gateway, controller or hub, it connects directly to WiFi as a WiFi client or access point
  • Supported WiFi protocols: 802.11 b / g / n (2.4 GHz)
  • Can work as a standalone device or connected to Shelly’s Cloud
  • Turn devices on/off directly from your smartphone or tablet. You can manage Shelly EM output from Shelly app, MQTT or Rest API
  • On home networks it seamlessly integrates with home automation systems via HTTP and/or UDP protocols



  • overpower control


Scheduling, timers:

  • Choose a time and create custom daily schedules for your devices.
  • Auto turn on and off by hour or sunset and sunrise.


For developers:

  • Its facotry firmware supports integration to various home automation systems.
  • You can manage ShellyEM output from Shelly app, MQTT or Rest API.
  • REST API documentation can be found here:
  • Shelly ЕМ comes with a programming/debug header which can be used to flash alternative firmware on the device.

Additional information

Dimensions 3.9 × 3.6 × 1.7 cm


CE certificate:

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