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

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Original price £79.99
Original price £79.99 - Original price £79.99
Original price £79.99
Current price £74.99
£74.99 - £74.99
Current price £74.99
Availability:
Out of stock

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
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.

What’s Included
  • Shelly 3EM-63W Gen3
  • Integrated current transformer wires (63 A version)
  • Installation documentation
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)
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