Shelly PRO 3EM-120A

Product Introduction

The Shelly Pro 3EM-120A is a professional-grade three-phase smart energy meter designed for installation inside electrical distribution boards using a DIN-rail mounting system. It enables precise monitoring of electricity consumption across three phases, making it suitable for residential, commercial, and industrial energy monitoring applications.

Using three external current transformer clamps rated for up to 120 A per phase, the device measures voltage, current, power factor, and energy consumption in real time. This allows users to monitor the energy usage of entire buildings, solar installations, EV chargers, or high-power equipment through the Shelly Smart Control platform or compatible automation systems.

With LAN, Wi-Fi, and Bluetooth connectivity, the Shelly Pro 3EM-120A supports both local and cloud control while offering advanced automation capabilities. The device also supports bidirectional energy monitoring, enabling measurement of both consumed and generated energy, making it particularly useful for photovoltaic (solar) installations.

Key Features

Three-Phase Energy Monitoring
Measures energy consumption across three electrical phases simultaneously for comprehensive power monitoring.

Up to 120A Measurement Per Phase
Includes three current transformer clamps capable of monitoring loads up to 120 A per phase.

Professional DIN-Rail Installation
Designed for installation in electrical distribution boards for centralized energy monitoring systems.

Real-Time Power Monitoring
Reports voltage, current, active power, and power factor for each phase in real time.

Bidirectional Energy Measurement
Tracks both energy consumption and energy production, making it ideal for solar energy systems.

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

Smart Home Integration

The Shelly Pro 3EM-120A integrates with a wide range of smart home ecosystems and automation platforms.

Supported integrations include:

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

Once connected, the device can be used for automation scenarios such as:

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

Technical Specifications

Product Type: Three-Phase Smart Energy Meter
Model: Shelly Pro 3EM-120A
Measurement Channels: 3 phases
Maximum Measurement Current: 120 A per phase
Power Supply: 110–240 V AC
Connectivity: Wi-Fi 2.4 GHz, Ethernet (LAN), Bluetooth
Measurement Accuracy: Approx. ±1%
Energy Data Logging: Up to 60 days of historical data at 1-minute intervals
Measurement Parameters: Voltage, current, active power, reactive power, power factor
Mounting: DIN-rail installation
Operating Temperature: −20 °C to 40 °C

What’s in the Box

Shelly Pro 3EM-120A energy meter
3 × 120A current transformer clamps
Mounting hardware
Quick start guide