Shelly PRO 3EM 120A Professional Power Meter

Shelly Pro 3EM – a DIN rail mountable three-phase energy meter (Wi-Fi, Ethernet, Bluetooth) with Gen2 firmware flexibility, ideal for professional integration.

Features

• Measures voltage, current, active & apparent power per phase
• 4-quadrant measurement (import/export)
• Phase inputs + neutral, uses current transformer (CT) inputs
• Optical pulse indication of energy usage
• Real-time clock and 60-day data log at 1-minute resolution
• Accuracy Class B (~1 %) per IEC 62053-21
• Optional phase sequence error detection
• Secure connectivity: TLS/mTLS, Webhooks, MQTT, WebSocket, HTTP/HTTPS, Modbus support
• Internal temperature sensor and overload protection

Primary Uses

• Energy monitoring for homes, offices, or industrial installations
• PV systems energy import/export tracking
• Data analytics and automation triggers from energy data
• Seamless integration with industrial systems via Modbus and scripting

Compatibility

• Accessible locally via Web UI or via cloud
• Integrates with Alexa, Google Home, SmartThings via MQTT/Webhooks
• Hub-free operation