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Shelly 3EM

Tested with Home Assistant
Original price £119.99 - Original price £119.99
Original price
£119.99
£119.99 - £119.99
Current price £119.99
Availability:
Low stock

Shelly 3EM is a Wi-Fi three-phase energy monitor designed for precise monitoring of electricity consumption in residential, commercial, and industrial installations. It connects directly to your Wi-Fi network with no hub required and allows real-time measurement of energy usage across three independent phases or circuits. Shelly 3EM supports bidirectional energy monitoring, making it suitable for tracking consumption and solar power generation, and includes a contactor control output for load automation. It integrates with the Shelly app and home assistant for monitoring, logging, and automation.

 

Key Features
  • Wi-Fi three-phase energy monitor with no hub required
  • Measures power, voltage, current, and energy on up to three independent phases
  • Supports bidirectional energy monitoring for consumption and energy generation
  • Contactor control output for automated load switching
  • Real-time and historical energy usage tracking
  • Works with the Shelly app for local and remote monitoring
  • Compatible with Amazon Alexa, Google Assistant, and Home Assistant
  • Supports schedules, automation rules, REST API, and MQTT
Use Cases

Three-Phase Energy Monitoring

Monitor real-time and historical electricity usage across three-phase systems or multiple circuits.

Solar and Energy Generation Tracking

Track energy produced by solar panels or other generation sources using bidirectional energy measurement.

Load Automation

Automatically control high-power loads such as heaters, EV chargers, or machinery using the built-in contactor output.

Home and Building Automation

Integrate detailed energy data into automation platforms using REST API, MQTT, or supported voice assistants.

What’s Included
  • Shelly 3EM energy monitoring module
  • Three current transformer clamps
Technical Specifications
Power
Power supply AC: 110–240V ±10%, 50/60Hz
Measurement
Measurement channels: 3

Maximum current: Up to 120A per channel (with compatible current transformer)

Power measurement: Yes

Energy measurement: Yes

Bidirectional measurement: Yes
Contactor Control
Output type: Dry contact

Maximum load: 10A at 230V AC
Operational
Operational temperature: -20°C to +40°C

Device power consumption: < 1 W
Connectivity
Wireless protocol: Wi-Fi 802.11 b/g/n

Radio frequency: 2412–2484 MHz

Radio signal power: 1 mW

Range: Up to 50 m outdoors and up to 30 m indoors (depending on building materials)
Dimensions
Size: 73 × 57 × 22 mm
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