Shelly 2L Gen3 WiFi Switch without Neutral Wire

With the Shelly 2L Gen3, you can bring two circuits in your home into the smart home age – even without a neutral wire. This compact module allows you to independently control two circuits, such as two lamps or sockets, via WiFi, app, or voice assistants. The new Gen3 generation impresses with more powerful hardware, more memory, and enhanced security features. Thanks to the integrated bypass (included), you can safely operate LED lights or other low-power devices. Ideal for existing installations in older buildings where no neutral wire is present. You can easily install the 2L in existing wall boxes and continue using existing switches or buttons. Control can be local or via the cloud – whichever you prefer. The device is compatible with common platforms like Home Assistant, openHAB, or Node-RED. More complex scenarios can also be implemented with scripting and webhooks. The Shelly 2L Gen3 is thus ideal for anyone who wants to smarten up two consumers at once – without laying additional cables.

Features:

• Two independent circuits: You can control two lamps or other devices separately – perfect for rooms with split circuits.
• No neutral wire necessary: Thanks to sophisticated technology, the 2L also works in installations without a neutral wire – the bypass is already included.
• Compact design: The module fits easily behind existing light switches or in wall boxes.
• WiFi control without a gateway: The Shelly 2L Gen3 connects directly to your WiFi – no additional hub needed.
• App and voice control: Use the free Shelly app or control via Google Assistant and Amazon Alexa.
• Safe and future-proof: Thanks to the Gen3 platform with improved memory, more secure chip, and extended firmware.
• REST API and MQTT support: Easy integration into automation platforms like Node-RED, openHAB, or Home Assistant.
• Operation without the cloud: You can use the 2L entirely locally – ideal for maximum privacy.
• Internal temperature sensor: Protects the device from overheating by automatic shutdown.

Application examples:

• Smart control of ceiling and wall lighting in the living room with just one module.
• Retrofitting hallway and staircase lighting without a neutral wire.
• Integrated into Home Assistant for timed scenes like “Wake Up” or “End of Day”.
• Conversion of a double switch into a fully controllable smart module.
• Switching power strips for home office and TV devices with remote access.

Documentation:

• Shelly Knowledge Base
• Shelly Forum Deutsch

Technical Specifications:

• Manufacturer: Allterco
• Manufacturer SKU: Shelly_2L_Gen3
• Physical properties:
  • Maximum torque of screw terminals: 0.4 N
  • Conductor cross-section: 0.2 to 2.5 mm² (solid, stranded, ferrules)
  • Stripping length: 6 to 7 mm
  • Installation type: In-Wall
  • Housing material: Plastic, color Cyan
  • Terminals color: Black
• Environment:
  • Operating temperature: -20 °C to +40 °C
  • Storage temperature: 10 °C to +40 °C
  • Humidity: 30% to 70%
  • Max. operating altitude: 2000 m
• Electrical
  • Supply voltage: 220–240 V~ 50 Hz
  • Power consumption: < 1.2 W
  • Neutral wire required: No (Bypass required for loads at O)
  • Minimum load without neutral: Bypass required for LED lights, not for incandescent bulbs
  • External protection: 10 A circuit breaker, characteristic B/C, 6 kA breaking capacity, class 3
• Circuit output
  • Max. switching voltage: 240 V~ 50 Hz
  • Max. switching power: 200 W (per channel)
• Sensors:
  • Internal temperature sensor: Yes
• Radio:
  • WiFi: 802.11 b/g/n, 2401–2495 MHz, < 20 dBm WiFi range: up to 30 m indoors / 50 m outdoors
  • Bluetooth 4.2: 2400–2483.5 MHz, < 4 dBm, up to 10 m indoors / 30 m outdoors
• MCU:
  • Processor: ESP-Shelly-C38
  • Clock frequency: 160 MHz
  • RAM: 512 KB
  • Flash: 8 MB
• Firmware features:
  • Schedules: Up to 20
  • Webhooks: Up to 20 with 5 URLs each
  • Scripting: Yes
  • MQTT support: Yes
• Dimensions: 37 x 42 x 16 mm
• Weight: 53 g

Package Contents:

• 1x Shelly 2L Gen3 WiFi Switch
• 1x Shelly Bypass