The Shelly 1L Gen3 is a compact, Wi-Fi-based smart relay that offers an ideal solution for retrofitting and smartening lighting systems where there is no neutral wire in the wall socket, only a phase wire. This is especially useful in older buildings where installing traditional smart relays can be challenging. The Shelly 1L Gen3 enables remote lighting control, setting schedules, and creating automation scenes without the need for a neutral wire.
The device is easy and quick to install, taking as little as 10 minutes. The Shelly 1L Gen3 is specifically designed to fit behind standard wall switches or other tight spaces, making it ideal for retrofit installations. Thanks to its built-in Wi-Fi and Bluetooth connections, it easily integrates into existing smart home systems and allows remote access and control.
About the Shelly brand
Shelly is a brand of the European company Shelly (formerly Allterco Robotics), known worldwide for its innovative and reliable smart home solutions. Thanks to their modular design and open integration options, Shelly products are popular among both the DIY community and professional installers.
Main product features:
- Perfect for retrofit installation! No neutral wire needed. Lights or other devices can be powered and controlled with just a phase wire, without connecting the device to neutral.
- Supported load types:
Incandescent bulbs
LED lighting
*For light sources that do not use a step-down transformer (in case of low voltage lighting). - Minimum bulb power: A Bypass 1L/2L Gen3 unit must be installed next to LED lamps, allowing the control of bulbs above 5W. Not needed for traditional incandescent bulbs.
- Wi-Fi connection: The Shelly 1L Gen3 connects to the home Wi-Fi network, enabling remote control via the Shelly mobile app or other smart home platforms.
- Remote control: With the Shelly app and an internet connection, you can control the connected device from anywhere via smartphone or tablet.
- Voice control: If connected to voice assistants such as Amazon Alexa or Google Assistant, it can also be controlled using voice commands.
- Scheduling and automation: Shelly 1L Gen3 supports scheduling and automation, allowing you to create routine tasks and set timers, such as automatic light switching at specific times.
- Compatibility Designed and tested for compatibility with various lighting types. Operates within the 220–240 VAC voltage range.
- Compact design The Shelly 1L Gen3 has a compact size, making it easy to fit behind light switches or inside junction boxes without taking up much space.
- Protection Internal temperature sensor for overheating protection.
- Local and remote access Devices can be controlled locally within the same Wi-Fi network or remotely when you’re not at home.
- OTA updates Shelly devices regularly receive over-the-air firmware updates to add features and enhance security.
- Smart home system compatibility
- The Shelly 1L Gen3 can be compatible with various smart home systems such as MQTT, Home Assistant, etc., making it a flexible solution for smart home setups.
- What’s new compared to the old Shelly 1L: Includes all the new features of the latest Shelly devices:
- Scripting capabilities
- HTTPS and MQTTS support
- Inbound and outbound WebSocket support
Smart home protocols and platform compatibility
- Supported protocols: Wi-Fi (802.11 b/g/n), Bluetooth 4.2
- Bluetooth Gateway function: Capable of receiving and forwarding signals from Shelly BLE devices (remotes and sensors)
- Native platform: Shelly Smart Control App (Android, iOS)
- Cloud platform integrations: Amazon Alexa, Google Assistant
- Third-party platforms: Home Assistant, OpenHAB, Domoticz, ioBroker, Node-RED, MQTT, REST API, Webhook, HTTPS, UDP
- Voice control: Supports Amazon Alexa and Google Assistant
Smart features
- Remote on/off switching
- Status inquiry from a distance
- Setting schedules and automations: up to 20 timers can be stored in the device’s memory.
- Create scenes with other Shelly devices
- Local and cloud-based operation
- Firmware update support
- Bluetooth Gateway function for BLE devices: can be controlled via Shelly Bluetooth remotes and wireless Bluetooth wall switches
Electrical features
- Power supply: 220–240V AC, 50/60Hz
- Maximum load: 200W (on the O1 output) @ 240V AC
- Switch input: 2 inputs, compatible with up to 2 push-button or toggle switches. Not compatible with intermediate or crossover switches.
- Voltage-free (dry contact) switching: Not supported
- Energy metering: Not supported
- Auto-off / Auto-on function: Supported
Other features
- Size: Compact design, fits behind standard wall switches
- Installation: Easy and fast in-wall installation
- Bypass requirement: Shelly Bypass 1L/2L Gen3 must be used.
- DIY compatibility: Open API and MQTT support, ideal for DIY projects
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