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Shelly 3EM-63W Gen3 – Wi-Fi Three-Phase Energy Meter with Integrated CTs
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Shelly 3EM-63W Gen3 – Wi-Fi Three-Phase Energy Meter with Integrated CTs

Original price was: £79.99.Current price is: £74.99.

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Overview

The Shelly 3EM-63W Gen3 is a compact Wi-Fi three-phase energy meter with integrated current transformers, designed to monitor power consumption across three-phase systems or up to three independent single-phase circuits.

It provides detailed real-time and historical energy data, including voltage, current, active power, apparent power, power factor, and accumulated energy per phase. With local processing, cloud connectivity, and advanced scripting capabilities, it is suitable for home energy monitoring, commercial installations, and energy optimisation setups.

The device includes built-in data storage, an embedded web interface, and Bluetooth onboarding, enabling fast setup and full local operation without requiring a hub.

Key features

  • Three-phase energy monitoring or three independent single-phase circuits
  • Integrated current transformers supporting 0–63 A per phase
  • Class B accuracy (IEC 62053-21) with 4-quadrant measurement
  • Real-time monitoring of voltage, current, power, and energy
  • Local data storage with up to 7 days of history
  • Embedded web server for direct device access
  • Wi-Fi connectivity with no hub required
  • Bluetooth for quick onboarding and configuration
  • Local automations and advanced scripting support
  • MQTT, HTTP, WebSocket, and REST API integration support

Product information

Use cases
  • Whole-Home Energy Monitoring
  • Track electricity usage across three-phase installations to understand total consumption and identify energy-saving opportunities.
  • Multi-Circuit Monitoring
  • Monitor up to three independent circuits such as EV chargers, HVAC systems, or workshops.
  • Solar and Energy Optimisation
  • Measure grid import/export and integrate with energy automation platforms for solar optimisation and load management.
Technical specifications
Power
Power Supply
220–240 V AC, 50/60 Hz (between LA and N)
Power Consumption
< 2 W
Measurement
Voltage (RMS)
220–240 V AC
Voltage Accuracy
±1%
Current (RMS via integrated CT)
0–63 A (130 A saturation)
Current Accuracy (2–63 A)
±1%
Current Accuracy (1–2 A)
±2%
Current Accuracy (0–1 A)
±5%
No-Load Threshold
30 VA
Measured Values
Active power, apparent power, active energy, apparent energy, power factor, fundamental active energy, fundamental reactive energy
Data & Storage
Consumption History
Minimum 7 days
Data Resolution
1-minute intervals
Data Export
CSV (power quality values), JSON via RPC
Connectivity
Wi-Fi Protocol
802.11 b/g/n (2.4 GHz)
Wi-Fi RF Band
2401–2483 MHz
Max Wi-Fi RF Power
< 20 dBm
Wi-Fi Range
Up to 50 m outdoors, up to 30 m indoors
Bluetooth
4.2
Bluetooth Range
Up to 30 m outdoors, up to 10 m indoors
Environmental
Operating Temperature
−20 °C to 40 °C
Humidity
30–70% RH
Physical
Dimensions
21 × 54 × 42 mm
Wire Length
260 mm (including flat terminal)
What’s included
  • Shelly 3EM-63W Gen3
  • Integrated current transformer wires (63 A version)
  • Installation documentation

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