Shelly 3EM-63T Gen3 – Wi-Fi Three-Phase Energy Meter with Terminal Connections
Overview
Shelly 3EM-63T Gen3 is a compact Wi-Fi-operated three-phase energy meter designed for monitoring three-phase electrical systems or up to three independent single-phase circuits.
This terminal-based version is intended for installations where fixed wiring via screw terminals is preferred.
It delivers precise real-time and historical measurements of voltage, current, active and apparent power, power factor, and accumulated energy per phase. The device supports local operation, cloud integration, and advanced automation, making it suitable for both residential and professional energy monitoring.
With built-in data storage, an embedded web interface, Bluetooth onboarding, and future-ready solar monitoring support, Shelly 3EM-63T Gen3 provides reliable and flexible energy management.
Key Features
• Three-phase energy monitoring or 3 independent single-phase circuits
• Terminal-based wiring connections (63T version)
• Integrated current transformers (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 (up to 7 days at 1-minute resolution)
• Embedded web server for direct local access
• Wi-Fi operated – no hub required
• Bluetooth for fast inclusion and setup
• Local automation and full scripting support
• MQTT, HTTP, WebSocket, and REST API support
• Suitable for future solar and energy optimisation use cases
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:
• ±1% (2–63 A)
• ±2% (1–2 A)
• ±5% (0–1 A)
No-load threshold: 30 VA
Measured values:
• Active & apparent power
• Active & apparent energy
• Power factor
• Fundamental active & reactive energy
Data & Storage
Consumption history: Minimum 7 days
Data resolution: 1-minute intervals
Data export:
• CSV (power quality values)
• JSON via RPC
Environmental
Operating temperature: -20°C to 40°C
Humidity: 30% to 70% RH
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
Physical
Dimensions (H × W × D): 31 × 54 × 42 mm
Connection type: Screw terminals (63T version)
Installation Notes
• Designed for installation inside electrical cabinets
• Terminal wiring suitable for fixed installations
• Supports three-phase or multi-circuit single-phase setups
• Can operate fully locally without cloud dependency
• External protection recommended: 63 A, type B or C circuit breaker
In the Box
• Shelly 3EM-63T Gen3
• Installation documentation