Energy meter SHELLY Pro 3EM CT63 - Wi-Fi / Bluetooth

Shelly Pro 3EM 3CT63 is an accurate and versatile Wi-Fi energy meter that enables real-time monitoring of electricity consumption in homes, businesses, and other properties directly from a smartphone. The device measures energy consumption in three-phase electrical systems with currents of up to 63 A per phase, providing Class B measurement accuracy. The meter is also ideal for solar power systems, as it measures both energy drawn from the grid and energy fed back into it. Comprehensive consumption history helps identify peak consumption periods, monitor energy usage, and discover potential opportunities for savings.

The Pro 3EM 3CT63 enables electricity remote consumption monitoring through the Shelly Smart Control app. The consumption of each of the three phases can be monitored individually, and the meter stores measurement data in its internal memory for up to 60 days at one-minute intervals. The device connects directly to a Wi-Fi network without a separate hub, and a LAN connection is also available when needed. The meter can operate on a local network without an internet connection and can be integrated into broader home automation systems, such as Home Assistant. The device aldo supports Bluetooth, making the initial setup easier.

Shelly Pro 3EM 3CT63 is designed for installation in electrical distribution boards where reliable measurements and efficient use of space are essential. The meter is mounted on a DIN rail, and the included three-phase 3CT63 current transformer enables measurement of all three phases using a single compact module. Instead of separate current clamps, the integrated current transformer simplifies installation and saves space. The meter's functionality can also be expanded with the separately available Shelly Pro 3EM Switch Add-on module, which enables electrical devices to be controlled using an external contactor. Five-year (60-month) warranty!

Basic delivery contents

• Shelly Pro 3EM energy meter
• 3 x 63 A current transformers
• 3CT63 connection module
• DIN rail adapter module

Delivery contents (Energy meter + Shelly Pro 3EM Switch Add-on)

• Basic delivery contents
• Shelly Pro 3EM Switch Add-on relay add-on

Technical specifications

• Brand and model: Shelly Pro 3EM 3CT63
• Intended use: Energy consumption measurement and monitoring of three-phase electrical systems or single-phase circuits
• Operating voltage: 100–260 V
• Measurement current: 0–63 A / phase
• Power consumption: Less than 3 W
• Measurement channels: 3
• Current transformer: Shelly 3CT63 (three-phase, included)
  • Measurement current: Up to 63 A / phase
  • Conductor opening diameter: Ø 9 mm
• Neutral wire required: Yes
• Measurement data storage: Up to 60 days, at 1-minute intervals
• Wireless connectivity: Wi-Fi 2.4 GHz (802.11 b/g/n), Bluetooth 4.2
• Wired network connection: Ethernet (LAN, RJ45)
• Energy consumption monitoring: Yes
• Scheduling and automation: Yes, based on measurement data
• Requires a separate hub: No
• Operating temperature: -20 – +40 °C
• Permissible humidity: 30–70% RH
• Installation: DIN rail mounting in an electrical distribution board
• Material: Plastic
• Color: White
• Dimensions:
  • Energy meter: 94 x 19 x 69 mm
  • Current transformer: 14 x 54 x 26 mm
• Weight:
  • Energy meter: 62 g
  • Current transformer: 32 g
• Control and monitoring: Shelly Smart Control app, local web interface, and compatible automation systems
  • Compatible automation systems: Including Home Assistant
• Additional features: MQTT, Modbus, scripting support, real-time clock, and measurement data export in CSV and JSON formats
• Other features: Internal temperature sensor, 16 MB memory, and support for device control using a separate Shelly Pro 3EM Switch Add-on module
• Warranty: 60 months

Measurement features

• Voltage and current per phase
• Active and apparent power
• Active and apparent energy
• Reactive energy
• Power factor
• Bidirectional energy measurement (consumption and production)

Measurement accuracy

• Active energy accuracy class: B (±1%)
• Voltage: ±1%
• Current 2–63 A: ±1%
• Current 1–2 A: ±2%
• Current 0–1 A: ±5%