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Shelly
Shelly

EM Gen3

Compact two-channel Wi-Fi energy meter that measures consumption with two current transformer clamps up to 80A per channel. Includes a dry-contact relay for contactor control of heavy loads like water heaters and heat pumps.

Native Shelly integration, local and no cloud required, with MQTT support. Two-channel contactless metering via CT clamps (50A clamp included, up to 80A per channel) plus a dry-contact relay for contactor control; Matter is available over Wi-Fi via firmware, though energy data is not exposed to Matter.
Works on integrations
Shelly MQTT Matter
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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