Shelly Pro 3EM-3CT63 DIN Rail Smart 3-Phase Energy Meter with 63A Current Transformers
The Shelly Pro 3EM-3CT63 is a professional-grade DIN rail mountable single or three-phase energy meter designed for precise monitoring and management of electrical consumption across residential, commercial, and industrial installations. With included 63A current transformers (CT clamps), this device delivers accurate real-time measurements of voltage, current, active and apparent power, and power factor for each phase, making it ideal for whole-home energy monitoring, EV charger tracking, solar energy management, and industrial power distribution.
Why You'll Love the Shelly Pro 3EM-3CT63
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Professional 3-Phase Monitoring: Measures up to 63A per phase with 1% accuracy (Class B, IEC 62053-21)
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60-Day Data Logging: Stores up to 60 days of 1-minute interval energy data in non-volatile memory, even without internet
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Flexible Connectivity: Wi-Fi, Bluetooth, and LAN support with MQTT, Modbus TCP, HTTP, and WebSocket protocols
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Solar and Renewable Ready: 4-quadrant measurement tracks both imported and exported energy
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Advanced Automation: Custom scripting, webhooks, and integration with Home Assistant, Node-RED, and major smart home platforms
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Compact DIN Rail Design: Easy professional installation directly in your electrical panel
Real-Time Energy Insights
The Shelly Pro 3EM-3CT63 provides instantaneous measurements of voltage, current, active power, apparent power, and power factor for each phase in real time. Whether you're monitoring energy consumption across your entire home, tracking EV charger usage, or managing multi-phase commercial equipment, you'll have the detailed data you need to reduce costs and improve efficiency. The built-in real-time clock ensures accurate timestamps even if your internet connection drops.
Designed for Professionals
Enhanced with Gen2 firmware flexibility and robust connectivity options, the Shelly Pro 3EM-3CT63 is built for professional integrators and advanced users. The device supports standalone operation on a local LAN or Wi-Fi network, or cloud-based operation through industry-standard protocols. All inbound connections support TLS encryption for secure data transmission. Optional external contactor control is available using the Shelly Pro 3EM Switch Add-on (sold separately).
Included 63A Current Transformers
The Shelly Pro 3EM-3CT63 comes with a specially designed combined 3-phase current transformer capable of measuring up to 63A. These compact CT clamps provide non-contact measurements, simplifying installation while delivering highly accurate results suitable for a wide variety of capacitive and inductive loads including electric vehicle charging and commercial building energy management.
Perfect for Australian Homes and Businesses
Monitor your entire home's energy usage across all three phases to identify which appliances or systems are using the most power. Track your solar panel production and grid consumption simultaneously to maximise renewable energy usage. Monitor EV charger consumption in real time. Manage multi-tenant buildings, retail spaces, or industrial equipment with detailed phase-by-phase insights.
Key Specifications
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Measurement Range: 100-260V AC, 0-63A per phase
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Accuracy: 1% active energy measurement, Class B (IEC 62053-21)
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Connectivity: Wi-Fi 802.11 b/g/n (2.4 GHz), Bluetooth, LAN
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Protocols: Modbus TCP, MQTT, HTTP, WebSocket (all with TLS support)
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Data Storage: 60 days at 1-minute resolution in non-volatile memory
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Operating Temperature: -20°C to +40°C
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Power Consumption: < 3W
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Mounting: DIN rail (standard 35mm)
What's in the Box
- Shelly Pro 3EM-3CT63 DIN rail energy meter unit
- Shelly 3CT63 combined 3-phase current transformer (63A)
- User guide and safety instructions
Full Specifications
Physical
| Dimensions (H×W×D) |
Shelly Pro 3EM: 94 × 19 × 69 mm
Shelly 3CT63: 14 × 54 × 26 mm |
| Weight |
Shelly Pro 3EM: 62 g
Shelly 3CT63: 32 g |
| Mounting |
DIN rail (Pro 3EM), freestanding on phase wires (3CT63) |
| Shell Material |
Plastic |
| Shell Colour |
White |
| CT Aperture |
Ø9 mm |
Electrical
| Voltage Range |
100-260V AC |
| Current Range |
0-63A per phase |
| Accuracy Class |
Class B (IEC 62053-21) |
| Measurement Accuracy |
1% |
| Measurement Type |
4-quadrant (import/export capable) |
| Device Power Consumption |
< 3W |
| Conductor Cross Section |
0.5 to 2.5 mm² / 20 to 14 AWG |
| Max Screw Terminal Torque |
0.4 Nm |
Connectivity
| Wireless Protocol |
Wi-Fi 802.11 b/g/n |
| Radio Frequency |
2400-2495 MHz |
| Wi-Fi Range |
Up to 50m outdoors, 30m indoors (depending on building materials) |
| Bluetooth |
Yes |
| LAN Support |
Yes (when connected via compatible Shelly device) |
| Supported Protocols |
Modbus TCP, MQTT, HTTP, WebSocket |
| Security |
TLS support for all inbound connections |
Data & Features
| Data Logging |
60 days at 1-minute intervals |
| Memory Type |
Non-volatile |
| Real-Time Clock |
Yes (maintains time if SNTP connection lost) |
| Measurement Parameters |
Voltage, current, active power, apparent power, power factor, accumulated energy (per phase) |
| Phase Sequence Detection |
Yes |
| Custom Scripting |
Yes (mJS) |
| Webhooks |
HTTP/HTTPS |
| Smart Scheduling |
Weekly schedule, sunrise/sunset automation |
Environmental
| Operating Temperature |
-20°C to +40°C |
| Max Altitude |
Up to 2000m |
Compatibility
| Smart Home Platforms |
Home Assistant (local), Amazon Alexa, Google Home |
| No Hub Required |
Yes (works standalone) |
| Matter Ready |
Yes (firmware upgrade) |
| Add-on Support |
Shelly Pro 3EM Switch Add-on for external contactor control |
Warranty
| Manufacturer Warranty |
5 years |
Specifications are sourced from the manufacturer product page and may be updated.
