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The Shelly Pro 3EM ‑ 3CT63 is a next-generation DIN rail mountable single or three-phase energy meter, designed for professional-grade monitoring and management of energy consumption across residential, commercial, and industrial installations. Enhanced with Gen2 firmware, LAN connectivity, and a specially designed 63A three-phase current transformer, it delivers precision, flexibility, and reliability for integrators and advanced users alike.
This professional-grade energy meter measures accumulated energy as well as real-time values for voltage, current, active and apparent power, and power factor for each phase. It supports 4‑quadrant measurement and multiple wiring configurations, making it suitable for everything from whole-home energy monitoring to complex industrial power distribution systems. With an accuracy class B (IEC 62053‑21) and 1% measurement precision, it provides dependable data you can trust.
Shelly Pro 3EM ‑ 3CT63 stores up to 60 days of 1-minute interval data in non-volatile memory and includes an integrated real-time clock, ensuring timestamps remain accurate even without an internet connection. This device is photovoltaic-ready and can track both imported and exported energy, making it ideal for solar and renewable energy systems.
Designed for seamless integration, it supports LAN, WiFi, and Bluetooth connectivity, and can communicate locally or via the cloud using protocols such as Modbus, MQTT, HTTP, and WebSocket—with all connections secured via TLS. It also features an embedded web interface for direct configuration and monitoring.
External contactor control is available using the Shelly Pro 3EM Switch Add-on, enabling you to automate load control based on real-time data or custom scripts. Please note that the device does not include a built-in relay.
Thanks to its compact DIN rail design and included bank of three 63A current transformers, the Shelly Pro 3EM ‑ 3CT63 is easy to install in tight electrical panels, making it ideal for a wide range of applications, including:
• Whole-home or commercial energy monitoring
• Factory and industrial power optimisation
• Data centre or substation monitoring
• Renewable energy installations (solar/wind)
• EV charger and high-load appliance tracking
• Smart grid and building management systems
With its robust hardware, advanced connectivity options, and long-term data logging capabilities, the Shelly Pro 3EM ‑ 3CT63 is the ultimate professional tool for precise energy measurement, intelligent automation, and optimised power management.
Measure active imported and exported energy of capacitive and inductive load types.
Shelly Pro 3EM has a measurement accuracy of 1%.
Allows for easy and fast deployment in existing industrial installations.
Simultaneous ethernet and Wi-Fi usage. MQTT, inbound and outbound WebSocket, UDP, mTLS support.
Monitors mono-phase electrical systems with up to 3 points simultaneously. Fast notifications and at least 60 days of 1-minute records storage.
Shelly Pro 3EM supports MJS scripting, allowing you to create additional features and functionality.
