Shelly Pro 3EM – 120A

£139.99 Excl. VAT £116.66

In stock

Next-generation DIN-mountable 3-Phase Energy Meter

Shelly Pro 3EM is a DIN rail mountable three-phase energy meter. Enhanced with all the Gen2 firmware flexibility and LAN connectivity, it provides professional integrators with additional options for end-customer solutions. Shelly Pro 3EM reports accumulated energy as well as instantaneous voltage, current, and power factor per phase in real time.

  • 4 quadrant measurement with multiple connection types
  • Accuracy Class B (IEC 62053-21) active energy
  • Photovoltaic ready
  • Phase sequence error detection* (option)
  • Optical pulse indication of energy usage
  • Measurement accuracy tо 1%
  • Stores data in non-volatile memory that can be retrieved for a period of up to 60 days in 1-minute intervals
  • Package includes 3 pieces of 120A Current Transformers

  • 4-Quadrant Measurement

    Measure active imported and exported energy of capacitive and inductive load types.

  • Accuracy Class B (active energy)

    Shelly Pro 3EM has a measurement accuracy of 1%.

  • MODBUS Support

    Allows for easy and fast deployment in existing industrial installations.

  • Wi-Fi, LAN and Bluetooth Connectivity

    Simultaneous ethernet and Wi-Fi usage. MQTT, inbound and outbound WebSocket, UDP, mTLS support.

  • Power Monitoring

    Monitors mono-phase electrical systems with up to 3 points simultaneously. Fast notifications and at least 60 days of 1-minute records storage.

  • Scripting Functionality

    Shelly Pro 3EM supports MJS scripting, allowing you to create additional features and functionality.



  • Power supply voltage AC 110-240V, 50/60Hz
  • Power consumption < 3W
  • Power metering 3 channels, up to 120A each


  • Mounting DIN rail
  • Ambient temperature -20°C to +40°C
  • Ambient humidity 30% to 70% RH
  • Voltmeters (RMS for each phase) 100-260 V
  • Voltmeters accuracy ±1%
  • Ammeters (RMS via CT for each phase and the Neutral) 0-120 A
  • Ammeters accuracy • ±1% at 2-120 A
    • ±2% at 1-2 A
    • ±5% at 0-1 A
  • Power and energy meter types • Active and apparent power
    • Active and apparent energy
    • Power factor
    • Fundamental active and reactive energy
  • Measurement data storage At least 60 days of 1 min data resolution
  • Data export CSV for PQ recorded values, JSON format export trough RPC


  • Wi-Fi protocol 802.11 b/g/n (2.4 GHz)
  • Operational range (depending on local construction) • up to 50m outdoors
    • up to 30m indoors
  • Bluetooth protocol 4.2
  • CPU ESP32-D0WDQ6
  • Flash 16 MB


  • (H x W x L) 94 x 19 x 69 mm

How it works?

Download the Shelly Cloud application on your smartphone or tablet
Connect to your Wi-Fi router
Place the device wherever you wish


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