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Shelly 1L Gen3
Shelly 1L Gen3
Shelly 1L Gen3
Shelly 1L Gen3
Shelly 1L Gen3
Shelly 1L Gen3
Shelly 1L Gen3

Shelly

Shelly 1L Gen3

SKU 3800235261637

For a UK light switch with no neutral in the back box. The Shelly 1L Gen3 sits behind the existing switch and adds app and schedule control to one lighting circuit up to 200 W, with a Shelly Bypass in the box for LED lamps.

Manufacturer: Shelly
£31.28 inc VAT

Key features

Wi-Fi Bluetooth
  • No neutral wire required
  • Shelly Bypass included in the box
  • Wi-Fi and Bluetooth connectivity
  • Powered from 220-240 V~ 50Hz
  • Up to 20 schedules, plus scripting, MQTT and webhooks
  • Overheating protection
  • Fits in a wall box behind the switch
  • Set up and run from the Shelly Smart Control app
Product details Manual

Why Shelly 1L Gen3

The Shelly 1L Gen3 sits behind the existing switch and adds app and schedule control to one lighting circuit up to 200 W, with a Shelly Bypass in the box for LED lamps

No neutral needed

Fits switch boxes that only have a live feed, which is common in older UK homes. The included bypass is fitted at the lamp for low-wattage LED loads.

Connectivity

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

Local automation

Up to 20 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.

Hidden install

Small enough to sit in the wall box behind an existing switch, so the room looks the same.

Shelly Smart Control

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

What the Shelly 1L Gen3 does

The Shelly 1L Gen3 is a single-channel smart switch for lighting circuits that have no neutral wire at the switch.

Good for:

  • Older homes without a neutral in the switch box
  • LED and incandescent lighting circuits
  • Adding app and schedule control without rewiring

Key facts

  • Neutral wire: Not needed (Shelly Bypass is required for the load at O)
  • Max. power: 200 W
  • Shelly Bypass: Included in the box
  • Power supply: 220-240 V~ 50Hz (Shelly Bypass is required)

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.

Pairs well with

Also consider

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

Guide: Shelly 1L vs Mini: no-neutral UK light switches

Questions

Does the Shelly 1L Gen3 need a neutral wire?

No. It works without a neutral wire. A Shelly Bypass is needed for LED lighting, and one is included in the box.

Do I need a hub for the Shelly 1L 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.

Will the Shelly 1L Gen3 fit in a UK back box?

The body measures 37 x 42 x 16 mm. Whether it fits depends on the box depth and the cables already in it.

What's the maximum load?

It is rated up to 200 W.

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
Download on theApp Store Get it onGoogle Play

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.