Product detailed description

🔌 Shelly Pro EM-50 – A Professional 1-Phase Energy Meter with Contactor Control

Gain absolute, pinpoint clarity on exactly how much power your household or commercial enterprise is burning through. The Shelly Pro EM-50 is a premium, single-phase smart energy meter meticulously designed to be installed easily, safely, and securely directly onto the DIN rail inside your main electrical distribution board.

Boasting a remarkable Class B accuracy for active energy measurement, this device achieves a professional-level precision of an incredible 1%. The Shelly PRO EM-50 stands as the ultimate analytical tool for monitoring precise consumption, optimizing solar power systems, and intelligently managing an array of large home appliances or heavy electrical circuits.

Precise Measurement Paired with a Built-in Relay (Dry Contact)

A massive technological advantage of this model is that, in addition to its current measurement terminals, the device features an integrated dry contact (voltage-free) switch with a capacity of up to 2A right on its body. This means the meter does not just passively record power data—it can actively engage with the connected infrastructure. Thanks to this physical output, you can directly control external high-power contactors and other heavy relays right from the meter. This allows you to effectively and safely disconnect an entire heavy appliance circuit (such as turning off a water boiler or AC unit based purely on live consumption readings). The Shelly Pro EM-50 provides detailed, real-time reporting on accumulated energy, instantaneous voltage, flowing current, as well as active and apparent power—all beautifully visualized in live graphs directly on your smartphone.

Massive Benefits of the Shelly Pro EM-50 Energy Meter

• ⚡ Measure 2 Independent Channels on 1 Phase: Utilizing the included current transformer (CT) clamps, the meter can safely and highly accurately monitor up to two completely separate circuits, handling up to an enormous 50 A of load each. You gain instant insight into how much power the main house draws versus the detached garage.
• 🌐 Top-Tier Robust Connectivity: To ensure maximum network reliability from deep inside shielded metal breaker boxes, the device supports a fully hardwired RJ45 Ethernet LAN port connection, alongside fast Wi-Fi. The onboard Bluetooth ensures a completely painless initial pairing process via the app.
• 📈 Onboard Historical Data Storage: The energy meter retains a highly detailed history of its measurements locally for up to 60 days, operating with a shocking recording accuracy of 1 minute. This critical data remains intact and available to you even during severe home internet outages.
• 🤝 Industrial Protocol Support & Integration: The device natively supports advanced protocols including MQTT, WebSocket (both incoming and outgoing), UDP, and mTLS. Crucially, it fully supports the MODBUS communication protocol, proving that this piece of hardware is flawlessly suited for integration into existing, professional industrial automation installations.
• 🧠 Advanced mJS Scripting: Robust support for the mJS scripting language empowers installers and power users to write entirely custom functions, deeply automating the operation of the device to execute highly complex, user-specific rules on a local level.