Shelly Pro 3EM-400A

Shelly Pro 3EM-400A — WiFi Three-Phase Meter up to 400A per Phase

The Shelly Pro 3EM-400A (model SPEM-003CEBEU400) is a professional three-phase energy meter with Gen2 firmware and DIN rail mounting. Designed for high-power installations with measurement up to 400A per phase using included current clamps.

Key Specifications

• Model: SPEM-003CEBEU400
• 3 three-phase measurement channels (3×400A with included clamps)
• Accuracy Class B (IEC 62053-21)
• Storage: 60 days at 1-minute resolution
• WiFi 802.11 b/g/n + Ethernet RJ45 + BLE 4.2
• Power Supply: 110–240V AC, 50/60 Hz

Use Cases in Spain

• Consumption monitoring in high-power industrial installations
• Energy control in substations and electrical distribution centers
• Monitoring of large-scale photovoltaic installations
• DIY home automation projects with Home Assistant and MQTT

Integrations

Compatible with Home Assistant (local), Amazon Alexa, Google Home, MQTT, HTTP REST API, mJS scripting, and Modbus TCP. No hub or subscriptions required.

• RF Band: 2400 – 2495 MHz
• Max RF Power: <20 dBm
• Wi-Fi Protocol: 802.11 b/g/n
• Wi-Fi Range: Up to 30m indoors / 50m outdoors
• Ethernet: RJ45 Port (LAN)
• Bluetooth Protocol: BLE 4.2
• Bluetooth Range: Up to 10m indoors / 30m outdoors

Official Resources

• Shelly Knowledge Base — Shelly Pro 3EM-400A
• Web Interface Guide

APIs and Protocols

• This device
• All Shelly devices and services