Shelly Pro EM-50

Shelly Pro EM-50 – a single-phase DIN-rail energy meter with a built-in dry-contact relay for contactor control, enabling precise energy monitoring and control.

Features

• Connectivity: Wi-Fi, Ethernet (LAN), Bluetooth (BLE gateway)
• Single-phase, two-channel energy measurement (active & apparent power, voltage, current)
• Built-in 2 A dry-contact relay for contactor control
• 4-quadrant measurement (import/export), PV-ready
• Accuracy Class B (~1 %)
• Optical LED pulse indication
• Real-time clock with 60-day data logging at 1-minute resolution
• Low power consumption < 3 W
• Secure communication: TLS/mTLS, MQTT, WebSocket, HTTP/HTTPS, Modbus TCP
• Scripting, Webhooks, JSON/CSV data export

Primary Uses

• Energy monitoring and control for single-phase circuits with dual channels
• Automated load control (e.g., redirect PV surplus using contactor)
• Energy consumption analysis and automations
• Integration with industrial automation via Modbus and scripting

Compatibility

• Operates via local Web UI and cloud
• Integrates with Alexa, Google Home, SmartThings via ecosystem
• Hub-free operation