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
