Shelly Pro 3EM – 3CT63
£130.99
The Shelly Pro 3EM – 3CT63 is a DIN-rail three-phase energy meter supplied with a purpose-built bank of three 63A current transformers, rated to IEC 62053-21 Class B accuracy. It stores 60 days of 1-minute interval data, tracks imported and exported energy for solar setups, and communicates over LAN, Wi-Fi, Bluetooth, Modbus and MQTT. No built-in relay.
- Supplied with a bank of three 63A current transformers
- Class B accuracy (IEC 62053-21), 1% measurement precision
- Communicates via LAN, Wi-Fi, Bluetooth, Modbus and MQTT
- Photovoltaic-ready, tracking both imported and exported energy
Buy the Shelly Pro 3EM - 3CT63 online in the UK from ShellyUK — genuine Shelly stock with fast UK delivery.
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.
Supplied with a bank of three 63A current transformers
Class B accuracy (IEC 62053-21), 1% measurement precision
Communicates via LAN, Wi-Fi, Bluetooth, Modbus and MQTT
Photovoltaic-ready, tracking both imported and exported energy
Where you'd use it
Domestic Three-Phase Monitoring
Fit the 63A CT bank on a three-phase domestic supply to see real-time draw per phase, useful where load isn't balanced evenly across the property.
Solar Diversion Data Feed
Feed its per-phase import/export readings into a script or home automation system to drive solar diversion decisions for an immersion heater or battery.
Panel-Friendly DIN Retrofit
Install it on the DIN rail of an existing consumer unit where space is tight, since the compact CT bank is sized for smaller domestic and light-commercial panels rather than the 400A industrial version.
Specification
Connectivity
- Wi-Fi protocol
- 802.11 b/g/n (2.4 GHz)
- Operational range (depending on local construction) • up to
- 50m outdoors • up to 30m indoors
- Bluetooth protocol
- 4.2
Physical & Build
- Mounting DIN rail
- Shelly Pro
- 3EM-3CT63 (H x W x L) 94 x 19 x 69 mm
- Shelly
- 3CT63 (H x W x L) 14 x 54 x 26 mm
Environmental
- Ambient humidity
- 30% to 70% RH
Power & Electrical
- Power supply voltage
- AC 110-240V, 50/60Hz
- Power consumption < 3W
- Power metering
- 3 channels, up to 63A each
Other
- Ambient temperature
- -20°C to +40°C
- Voltmeters (RMS for each phase)
- 100-260 V
- Voltmeters accuracy
- ±1%
- Ammeters (RMS via CT for each phase and the Neutral)
- 0-63 A
- Ammeters accuracy • ±1% at
- 2-63 A • ±2% at 1-2 A • ±5% at 0-1 A
- Power and energy meter types • Active and apparent power • Active and apparent energy • Power factor • Fundamental active and reactive energy
- Measurement data storage At least
- 60 days of 1 min data resolution
- Data export CSV for PQ recorded values, JSON format export trough RPC
- CPU ESP32-D0WDQ6
- Flash
- 16 MB
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