Shelly PRO 3EM-400A

Product Introduction

The Shelly Pro 3EM-400A is a professional-grade three-phase smart energy meter designed for advanced electrical monitoring in residential, commercial, and industrial environments. Installed inside electrical distribution boards using a DIN-rail mounting system, the device enables precise monitoring of electricity consumption across all three phases of a power system.

The meter includes three 400 A split-core current transformer clamps, allowing accurate measurement of high-capacity electrical loads such as industrial machinery, large buildings, solar installations, and EV charging systems.

With integrated Wi-Fi, LAN, and Bluetooth connectivity, the Shelly Pro 3EM-400A supports remote monitoring, automation, and integration with smart home platforms or energy management systems. The device records energy data locally and can store historical measurements for detailed analysis and optimisation of power usage.

Key Features

Three-Phase Energy Monitoring
Measures electricity consumption across three phases simultaneously, providing complete insight into power usage.

High-Capacity Measurement (Up to 400A)
Includes three current transformer clamps capable of monitoring loads up to 400 A per phase.

Professional DIN-Rail Installation
Designed for mounting inside electrical distribution boards for centralized energy monitoring.

Real-Time Power Analytics
Reports voltage, current, active power, apparent power, and power factor per phase.

Wi-Fi, LAN, and Bluetooth Connectivity
Supports wired Ethernet and wireless connectivity for reliable integration with automation systems.

Bidirectional Energy Monitoring
Tracks both energy consumption and energy production, making it suitable for solar energy systems.

Smart Home Integration

The Shelly Pro 3EM-400A integrates with a wide range of smart home and automation platforms.

Supported integrations include:

• Shelly Smart Control App
• Amazon Alexa
• Google Home
• Home Assistant
• MQTT and REST API automation systems

Common applications include:

• Monitoring total building or industrial energy usage
• Tracking solar energy production and grid consumption
• Monitoring high-power equipment such as HVAC or EV chargers
• Automating loads based on energy consumption thresholds

Technical Specifications

Product Type: Three-Phase Smart Energy Meter
Model: Shelly Pro 3EM-400A
Measurement Channels: 3 phases
Maximum Measurement Current: 400 A per phase
Power Supply: 110–240 V AC
Connectivity: Wi-Fi 2.4 GHz, Ethernet (LAN), Bluetooth
Measurement Accuracy: Approx. ±1% active energy measurement
Data Storage: Up to 60 days of local energy data logging
Measurement Parameters: Voltage, current, active power, apparent power, and power factor
Mounting: DIN-rail installation
Dimensions: Approx. 69 × 19 × 94 mm

What’s in the Box

Shelly Pro 3EM-400A energy meter
3 × 400 A current transformer clamps
Mounting hardware
Quick start guide