Shelly 3EM-63T-GEN3 Single or Three-Phase Energy Meter

The Shelly 3EM-63T-GEN3 Single or Three-Phase Energy Meter represents the third generation of advanced energy monitoring technology from Shelly. This compact device is engineered to deliver precise, real-time monitoring for either a comprehensive three-phase electrical system or three independent single-phase circuits. Its versatile design allows it to function autonomously within a local Wi-Fi network or integrate seamlessly into sophisticated cloud-based home automation ecosystems through secure protocols including MQTT, HTTP, and WebSocket, with all inbound connections protected by TLS encryption.

Beyond simple energy tracking, the device provides detailed insights into accumulated energy consumption as well as instantaneous measurements for voltage, current, active power, and apparent power on a per-phase basis. It features a robust non-volatile memory capable of storing detailed data logs for retrieval for up to 7 days at 1-minute intervals. An integrated real-time clock ensures data retains accurate timestamps even during internet connectivity interruptions. The unit is equipped with an embedded web interface for straightforward local configuration, monitoring, and control, facilitating easy access for users within the same network.

Technical Specifications

• Model: SHELLY-3EM-63T-GEN3
• Measurement Type: 4-quadrant energy measurement
• Installation: On-MCB mounting (above or below the circuit breaker)
• Connection Capability: Configurable for three-phase or three independent single-phase installations
• Current Measurement: Non-contact, via external current transformers
• Accuracy Class: B (per IEC 62053-21 standard)
• Data Logging: Stores up to 7 days of data in 1-minute intervals
• Phase Sequence Error Detection: Optional feature to detect incorrect phase rotation
• No Load Threshold: 30 VA per channel; power is displayed but energy is not accumulated below this level

Key Features

• Real-Time Monitoring: Provides instantaneous readings of voltage, current, and power per phase.
• Secure Connectivity: Supports local Wi-Fi operation and cloud integration via MQTT, HTTP, and WebSocket with TLS.
• On-Device Data Storage: Maintains a 7-day data history with accurate timestamps from its real-time clock.
• Photovoltaic System Ready: Designed to monitor energy flows in solar power installations.
• Optical Pulse Indication: Features a visual LED indicator for energy usage.
• Embedded Web Interface: Allows for easy local setup, configuration, and monitoring without additional software.

Use Cases

This energy meter is ideally suited for residential and commercial applications requiring detailed energy consumption analysis. It is perfect for monitoring entire property energy usage in a three-phase supply, tracking individual high-consumption circuits like HVAC systems or industrial machinery, and managing energy production and consumption in grid-tied photovoltaic installations. Its ability to log data makes it invaluable for energy audits, cost allocation, and identifying opportunities for improved energy efficiency.