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

The Shelly 3EM-63W-GEN3 represents the third generation of sophisticated energy monitoring solutions, offering professional-grade metering capabilities for both residential and commercial applications. This compact device provides comprehensive real-time monitoring of either three-phase systems or three independent single-phase circuits, giving users complete visibility over their electrical consumption patterns. With its versatile connectivity options, the unit can operate standalone within a local Wi-Fi network or integrate seamlessly with cloud-based home automation services through multiple communication protocols.

Engineered for precision and reliability, this energy meter features non-contact current measurements through current transformers and maintains accurate data logging even during network interruptions. The device's robust construction and advanced monitoring capabilities make it suitable for everything from basic energy tracking to complex photovoltaic system monitoring. Its user-friendly web interface allows for straightforward configuration and real-time monitoring of all electrical parameters, while the optical pulse indicator provides immediate visual feedback on energy usage.

Technical Specifications

• Model Variants: 3EM-63W (Wire model), 3EM-63T (Flat terminal model)
• Measurement Capability: Single or three-phase systems
• Accuracy Class: B (IEC 62053-21)
• Data Storage: Up to 7 days in 1-minute intervals
• Communication Protocols: MQTT, HTTP, WebSocket with TLS support
• Current Measurement: Non-contact through current transformers
• Mounting: On-MCB installation (above or below circuit breaker)

Key Features

• Four-Quadrant Measurement: Comprehensive power quality analysis including import/export energy monitoring
• Phase Sequence Error Detection: Automatic detection of incorrect phase sequencing with visual alerts
• No Load Threshold: Intelligent power measurement that distinguishes between minimal loads and true zero consumption
• Real-Time Clock: Maintains accurate timestamps even during internet connectivity loss
• Optical Pulse Indication: Visual energy usage indicator for quick consumption assessment
• Photovoltaic Ready: Suitable for solar energy system monitoring and grid feedback applications
• Data Retention: Non-volatile memory ensures no data loss during power interruptions

Use Cases

This energy meter serves multiple applications across different sectors. For residential users, it provides detailed insight into household energy consumption, identifying high-usage appliances and optimising energy efficiency. Commercial establishments benefit from its three-phase monitoring capabilities for accurate billing and load management. Industrial applications include machinery monitoring and preventive maintenance through continuous power quality assessment. The device is particularly valuable for photovoltaic system owners, enabling precise monitoring of energy production, consumption, and grid feedback. Property managers can utilise multiple units for tenant billing and overall building energy management, while facilities managers appreciate the phase sequence detection for preventing equipment damage in three-phase systems.