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Shelly
Shelly

Pro EM-50

DIN-rail single-phase energy meter with two metering channels measuring voltage, current and power via clamp-on 50 A current transformers, plus a built-in dry-contact relay for contactor control. Stores at least 60 days of on-device data at 1-minute resolution for accurate consumption and production monitoring.

Native Shelly integration, local with no cloud required, plus MQTT; wired Ethernet (RJ45) alongside Wi-Fi and Bluetooth. Two independent metering channels (IA/IB) via 50 A clamp-on current transformers at +/-1% accuracy, with an integrated dry-contact relay for contactor control; no built-in display.
Works on integrations
Shelly MQTT
Roles it can fill
Energy Monitor

Recipes using this device

Energy · v1.0.0

High Energy Usage Alert

Installs a Home Assistant automation that watches your whole-home power draw and warns you when it stays high for longer than it should, so a heater or a forgotten appliance does not run all day unnoticed. Add speakers to hear it, add a smart plug to shed the load.

Recipes that can use it

These recipes are built around other hardware, and pick this device up as an optional extra.

Energy · v1.0.0

Solar Surplus EV Charging

Installs a Home Assistant automation that starts your EV charger when your solar array is producing a surplus and stops it when production drops, so the car pulls from the roof rather than the grid. Add a grid meter and a home battery and it holds back until they are happy too.

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