Shelly 1L Relay Switch

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Shelly 1L can convert any wall switch to a smart switch.  Just place the Shelly 1L behind the existing wall switch.  Shelly 1L does not require a Neutral wire connection.

Like all Shelly products, Shelly 1L has advanced scheduling features.  You can switch it on and off at a certain time, or control your light according to the sunset and sunrise hours.  You can even offset sunrise/ sunset by up to 3 hours.  You can also set the Auto Off and Auto On functions to automatically turn you Shelly1 on or off X minutes after the state changes which makes Shelly 1L the perfect solution when use with a motion sensor or when you forgot to switch off the lights.

Shelly 1L has a simple API which allows it to be controlled from any other Shelly or WiFi base device.  You simply need to know the IP address of Shelly 1L to send commands to it and to change the state from anywhere.  Shelly 1L can also control any other WiFi device in your home.  You can set a local action into each device that will execute when the switch is toggled or the output state is changed.  As many as 5 actions per Shelly device allow you to control up to 5 other devices at once.


Wireless No HUB required – Connect Shelly 1L directly to your WiFi at home.

No Neutral required Power on the device and control your light, fan, or other appliances only by Live wire, no neutral required to be connected to the device.

Highly compatible Compatible with Android, iOS, Amazon Alexa and Google Assistant. Control your appliance with your voice.

Overheating protection In case of high temperature Shelly 1L will switch OFF the output to protect itself and your home appliances

Sunrise/Sunset schedules Shelly 1L can automatically follow the sunrise and sunset and control your lighting accordingly.

Weekly schedules Choose a time and set your lighting to turn on/off when you want it to.

Rest API Use our REST API to connect Shelly 1L to your existing home automation system.

MQTT enabled Easily integrate Shelly 1L to your existing home server using MQTT or CoAP protocol.


  • Resistive Loads
  • Inductive Loads
  • Capacitive Loads
  • Lights
    • Incandescent lamps
    • Fluorescent lamps.
    • Halogen lamps.
    • Dimmable LED
    • Non Dimmable LED
    • Fluorescent tubes
    • Neon lamps.


Power supply AC 110-230V ±10%, 50/60Hz
Maximum load 4.1A (5A for short operation)
Power supply DC No
Channels 1 Channel
Device temperature protection Yes
Overload protection No
Power measurement No
Dimming No
Working without a neutral line Yes
Minimum load - no neutral connected, with bypass None
Minimum load - no neutral connected, without bypass 20W resistive load
Minimum load - with neutral connected None
Operational temperature 0°C to + 40 °C
Device power consumption < 1 W
Intelligent On/Off Yes
Local and remote control Yes
Sunrise/Sunset Yes
Weekly Schedule Yes
UL Listed option No
Capacitive Motor starting capacitors, Generators, Synchronous motors
Inductive Led lights, Transformers, Fans, Motors
Resistive Lights, Electric heaters
Dimmable LED Yes
Fluorescent lamps Yes
Fluorescent tubes Yes
Halogen lamps Yes
Incandescent lamps Yes
Neon lamps Yes
Non Dimmable LED Yes
Wireless Yes
Wi-Fi Protocol 802.11 b/g/n
Wi-Fi Radio frequency 2412 - 2484 MHz
Wi-Fi Radio signal power 1mW
Wi-Fi Range up to 50 m outdoors and up to 30 m indoors (depending on the building materials)
Size 42mm x 36mm x 14 mm
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