The Shelly 2 Output Power Base for Wall Display is a practical replaceable power supply and relay module specifically designed for the Shelly Wall Display X1i and X2i smart panels. The module allows the Wall Display to function not only as a control panel but also to directly control two separate electrical circuits, such as lighting or other electrical loads.
The device operates as a power supply module connected to the back of the Wall Display, offering a space-saving and integrated solution for installation into standard wall boxes. Thanks to the two built-in relays, up to two separate lighting circuits or other devices can be controlled from a single compact and smart unit.
Using the relays, lighting can be remotely switched, automated, or scheduled, while the Shelly Wall Display serves as the central user interface. The system also supports local operation, ensuring reliable functionality even without an internet connection.
Its compact design makes it especially suitable for apartments, hotels, smaller commercial spaces, and modern smart homes where aesthetic appearance, minimal space usage, and multifunctional control from a single wall-mounted unit are important.
About the Shelly brand
Shelly is one of the most well-known and innovative smart home brands in Europe, developed by the Bulgarian company Allterco Robotics. The manufacturer is particularly strong in the market of Wi-Fi and Bluetooth-based smart devices, many of which operate without a central hub, requiring only a working Wi-Fi network for quick and easy installation.
Shelly offers a wide product portfolio including relays, sensors, smart plugs, lighting solutions, and professional DIN rail-mounted devices. The brand places strong emphasis on local control, allowing devices to operate even without internet access, improving reliability and data security.
Shelly devices support advanced integrations such as REST API, MQTT, and Webhook communication, making them easy to integrate with platforms like Home Assistant, openHAB, Node-RED, and other DIY solutions. They are also compatible with popular cloud ecosystems including Google Home, Amazon Alexa, and Samsung SmartThings.
The latest Shelly generations also offer BLE gateway, Wi-Fi range extender, and other networking features. Shelly products are especially popular among advanced users and installers, while their ease of use also makes them suitable for beginners.
Integrations
Shelly devices are among the easiest smart devices to integrate thanks to their factory firmware. They support MQTT and REST API control and are compatible with Google Home, Amazon Echo, and Yandex Alice voice assistants. Through Shelly Cloud, many Shelly devices have already been integrated into SmartThings. The firmware also supports numerous open-source and third-party systems including:
- MQTT
- HomeSeer
- ioBroker
- Home Assistant
- openHAB
- Domoticz
- SYMCAN
- nymea
- Hubitat
- HOOBS
- REST API
Key product features
Dual independent relay outputs: Control two separate circuits from one module
Wall Display compatibility: Specifically designed for Shelly Wall Display
Compact design: Optimized for flush wall installation
Local control: Automations work even without internet
Remote control: Via Shelly app or integrated systems
Smart home protocols and platform compatibility
Connectivity: Through the Shelly Wall Display system
Platforms: Shelly Smart Control, Home Assistant, MQTT-compatible systems
Voice control: Alexa and Google Assistant support via the Shelly ecosystem
Smart features
Remote switching: ON/OFF control via mobile app
Automations: Scheduling and scene creation
Local operation: Works without cloud access
Multi-circuit control: Manage two separate electrical loads
Technical specifications
Product name: Shelly 2 Output Power Base for Wall Display
Function: Dual-channel power supply and relay module for Shelly Wall Display
Compatibility: Shelly Wall Display
Size: 72.30 × 69.8 × 28.70 mm
Weight: 53.5 g
Installation: Standard wall box
Housing material: Plastic
Housing color: Gray
Connector color: Green
Max. terminal tightening torque: 0.4 Nm
Wire cross-section: 0.75 – 2.5 mm² (18–14 AWG)
Stripping length: 6 – 7 mm
Power supply: 100–240V AC, 50/60Hz
Number of outputs: 2 independent relay outputs
Max. switching voltage: 240V AC
Max. switching current: 5A per channel
Auxiliary power output: 5V DC / 1A
Operating temperature: -20°C – +40°C
Humidity: 30–70% RH
Max. installation altitude: 2000 m
