Shelly Pro 3EM-400

Overview

Shelly Pro 3EM-400 is a DIN rail mountable three-phase energy meter with gen2 firmware flexibility and LAN connectivity. It supports standalone operation within a local LAN/Wi-Fi network or integration with cloud-based home automation services via MQTT, HTTP, and WebSocket. All inbound connections support TLS encryption.

Real-Time Monitoring and Data Storage

• Reports accumulated energy, voltage, current, active power, and apparent power per phase

• Stores data in non-volatile memory for up to 60 days in 1-minute intervals

• Equipped with a real-time clock to maintain time accuracy even if SNTP connection is lost

Remote Access and Control

• Can be accessed, set up, and monitored remotely within the same network infrastructure

• Embedded Web Interface for monitoring, control, and settings adjustment

Important Notice

⚠ The Device does not have a built-in relay. Contactor control requires a Shelly Pro Add-on attached to the Shelly Pro 3EM-400.

Features

• 4 Quadrant measurement

• DIN rail mounting

• Multiple connection types

• Current transformer connection

• Phase sequence error detection* (option)

• Channel-to-channel calibration**

• No load threshold***

• Optical pulse indication of energy usage

• Real-time clock

• Data logs

• Accuracy Class B (IEC 62053-21)

• Photovoltaic ready

* Phase sequence error detection ensures the correct order of phase voltages and reports misalignment.

** Requires at least 5000 W load per channel.

*** If total load per channel drops below 30 VA, energy consumption will not be recorded.

Main Applications

Residential

Multi-Dwelling Units (MDU)

Light Commercial

Industrial

Agricultural

Government/Municipal

University/College