Shelly Pro 3EM 120A — Three-Phase Energy Meter WiFi + Ethernet

Shelly Pro 3EM 120A — Professional Three-Phase Energy Meter with WiFi and Ethernet

The Shelly Pro 3EM 120A (model SPEM-003CEBEU120) is a DIN rail mountable three-phase energy meter with 3 x 120A current clamps included. It monitors three-phase electricity consumption in real-time with Class B accuracy and stores up to 60 days of data. It includes WiFi, Ethernet, and Bluetooth BLE 4.2 connectivity. Gen2 Pro generation. No hub or subscriptions required.

Technical Specifications:

• Model: SPEM-003CEBEU120
• Connectivity: WiFi 802.11 b/g/n (2.4 GHz) + Ethernet (RJ45) + Bluetooth BLE 4.2
• Power Supply: 110 – 240V AC, 50/60 Hz (three-phase)
• Current Clamps: 3 × 120A (included)
• Accuracy: Class B
• Data Storage: 60 days in internal memory
• Mounting: DIN Rail
• Operating Temperature: -20 to +40°C
• Certifications: CE, RoHS
• Protocols: MQTT, HTTP REST API, WebSockets, Webhooks, Scripting (mJS)

Key Features:

• Full three-phase measurement: active, reactive, and apparent power per phase
• 120A clamps included: installation without power interruption
• Certified Class B accuracy for energy auditing and cost control
• 60 days of local data storage without cloud dependency
• Dual WiFi + Ethernet connectivity for maximum availability
• Compatible with Pro 3EM Switch Add-On module for load control

Use Cases:

• Monitoring three-phase electricity consumption in homes and businesses
• Energy auditing in industrial and commercial installations
• Management of photovoltaic installations with production and consumption measurement
• Energy cost control in hotels, offices, and residential communities

Compatible with Home Assistant (local, no cloud), Amazon Alexa, Google Home, MQTT, HTTP REST API, and mJS scripting.

• 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

Resources and documentation:

• Official Knowledge Base (KB)
• This device
• All Shelly devices and services