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Shelly

Shelly EM Gen3

SKU 3800235261873

For measuring a circuit with a clamp, and switching a contactor from that reading. The Shelly EM Gen3 includes a 50 A transformer and can switch up to 2 A.

Manufacturer: Shelly
£77.01 inc VAT

Key features

Wi-Fi Bluetooth
  • Measures energy use through current clamps
  • Switches loads up to 2 A
  • Wi-Fi and Bluetooth connectivity
  • Powered from 110 - 240 V~ 50/60 Hz
  • Schedules, plus scripting, MQTT and webhooks
  • Overheating protection
  • Set up and run from the Shelly Smart Control app
Product details Manual

Why Shelly EM Gen3

The Shelly EM Gen3 includes a 50 A transformer and can switch up to 2 A

Energy metering

Reads current through its clamps and keeps an energy total, so the app shows what the house or a circuit uses.

Load rating

Switches loads up to 2 A. The manual lists the limits for lamps, motors and other load types.

Connectivity

Connects over Wi-Fi and Bluetooth. Setup runs from the phone, then the device joins the home network.

Local automation

Schedules, scripting, MQTT and webhooks run on the device itself, so routines keep working if the internet drops.

Built-in protection

Overheating protection cuts the output before the device or the load is put at risk.

Shelly Smart Control

Add the device, name it and build scenes from the free app on iPhone or Android.

What the Shelly EM Gen3 does

The Shelly EM Gen3 is an energy monitor with a contactor output, for measuring a circuit or the whole supply with clamp transformers.

Good for:

  • Household energy monitoring
  • Solar generation and export
  • Switching a contactor from energy readings

Key facts

  • Current range: 0 - 80A
  • Relay output: 2 A/240 V~
  • Power supply: 110 - 240 V~ 50/60 Hz
  • Mounting: Wall console, Electrical cabinet

Works with

Runs from the Shelly Smart Control app and works with Amazon Alexa, Google Home and Home Assistant, with no hub needed. Connectivity: Wi-Fi, Bluetooth.

Also consider

Browse Relays & dimmers, all Shelly and what Shelly is.

Guide: Which Shelly energy monitor for a UK home?

Questions

Do I need a hub for the Shelly EM Gen3?

No. It connects to your home Wi-Fi directly.

Should an electrician fit it?

We recommend a qualified electrician for anything connected to mains wiring. The manual is linked on this page.

What's the maximum load?

The contactor output switches up to 2 A.

Does it work with Home Assistant without the cloud?

Yes. It works with Home Assistant on the local network.

Shelly Smart Control

One free app for every device

This device is added and run from Shelly Smart Control, the free app for iPhone and Android.

  • Rooms, groups and scenes for the whole home
  • Live power readings on devices that measure energy
  • Control away from home, or keep it on the local network

iPhone needs iOS 15 or later. The app is published by Shelly.

Shelly Smart Control on two phones, showing room energy use and live device status.