SHELLY 3EM PRO 400

Shelly Pro 3EM-400 – Professional 3-Phase DIN-Rail Energy Meter

The Shelly Pro 3EM-400 is a next-generation, three-phase energy meter designed for professional installations requiring precision, flexibility, and secure connectivity. Its DIN-rail design and advanced Gen2 firmware provide seamless integration into residential, commercial, and industrial environments.

Equipped with LAN, Wi-Fi, and Bluetooth, the device can operate completely offline within a local network or integrate with cloud home automation platforms through MQTT, HTTP, and WebSocket (TLS-secured). It delivers real-time data on voltage, current, power, and accumulated energy per phase-ideal for renewable energy systems, consumption optimisation, and load analysis.

• Three-phase DIN-rail mountable professional energy meter
• 4-Quadrant measurement for advanced energy analytics
• LAN + Wi-Fi + Bluetooth connectivity (individually enable/disable)
• Current transformer inputs for high-capacity measurement
• Real-time monitoring of voltage, current, active & apparent power
• 60-day data storage with 1-minute resolution
• Built-in real-time clock for accurate data logging
• Phase sequence error detection (optional)
• Channel-to-channel calibration with 5000W minimum load
• No-load threshold alerts for improved accuracy
• Optical pulse indication of power usage
• Accuracy Class B (IEC 62053-21)
• Photovoltaic (solar) ready-ideal for solar monitoring

The Shelly Pro 3EM-400 does not include a built-in relay.
Contactor control requires a Shelly Pro Add-on (sold separately).

• Residential homes and solar energy monitoring
• MDU – apartments, condominiums, hotels
• Light commercial buildings (retail, office spaces, restaurants)
• Agricultural operations (barns, silos, pumping stations)
• Municipal and government facilities
• Universities and educational buildings

• Supports LAN, Wi-Fi (802.11 b/g/n), and Bluetooth 4.2
• Embedded web interface for configuration and monitoring
• Supports scripting, URL actions (webhooks), and MQTT
• Secure encrypted inbound connections (TLS)
• LED indicators for Power, Wi-Fi, LAN, and Measurement status

• Resistive – heaters, incandescent lighting
• Capacitive – LED drivers, electronics
• Inductive – motors, fans, air conditioners

• Power Supply: 110-240V AC
• Power Consumption: < 3W
• Current Transformer Range: 0-400A (comp. with CT-400A)
• Data Storage: 60 days (1-minute intervals)
• Operating Temperature: -20oC to 40oC
• Dimensions: 94 × 19 × 69 mm
• Mounting: DIN rail

The Shelly Pro 3EM-400 is a future-proof, highly accurate monitoring solution offering reliable data for energy optimisation, solar system tracking, and industrial-grade installation requirements.