Shelly WiFi Energy Meter and Contactor Control + 50 Amp Current Transformer

This product is currently sold out.

With Shelly EM you can view the quality of your electrical network regarding active power, reactive power, voltage and power factor.  Monitor your facility or home to avoid additional expense or drastic drops in voltage that can damage your appliances or machinery.  The relay will turn off immediately if it detects electrical consumption higher than the defined over-power setting.


Monitor the consumption of any home appliance, electric circuit and office equipment (lights, power lines, security systems, heating and cooling, etc.) individually.  Monitor the consumption of your whole home or generated electricity from solar panels with WiFi Energy Meter with contactor control functionality.  The only device of it's kind in the world.  Intelligently designed to fit in most standard electrical boxes and switches. Shelly EM is smaller than two cookies stacked together.

  • Countdown timer can automatically switch off the load after an hour
  • Two independent* measuring channels up to 120A each 
  • The two measured circuits and the Shelly EM must be on the same phase
  • One contactor control (or load up to 2A)
  • 365 days of internal memory in case Wi-Fi is not available
  • Voltage measurement and configurable alarm reporting


Power supply AC 110-230V ±10%, 50/60Hz
Power supply DC No
Channels 2 Channel
Contactor Control Yes - max 2A
Roller shutter mode No
Device temperature protection No
Overload protection No
Power measurement Yes
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 42mm x 36mm x 14 mm
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