The Shelly Plus 2PM Gen4 is a compact dual-channel smart switch that brings advanced energy monitoring to your smart home. This device fits easily behind switches or sockets, letting you control appliances remotely while tracking power use in real time. With support for Wi-Fi, Bluetooth, Zigbee, and Matter, it integrates seamlessly into modern setups for better home automation.
Product Overview
Right from the start, this device stands out for its small size and big capabilities. Measuring just 37 x 42 x 16 mm and weighing 30 g, it slips into standard wall boxes without hassle. It handles two independent channels on the same phase, each with up to 10 A AC switching (16 A total, 18 A peak). This makes it ideal for lights, fans, or even blinds with precise slat control.
What sets this device apart is built-in power metering per channel. You get voltage, current, and energy readings, plus an internal temperature sensor. Power it with 110-240 V AC or 24 V DC, and it consumes less than 1.4 W itself. The Gen4 upgrade brings a faster chipset, more RAM, and native Matter compatibility for future-proofing your installation.
Technical Specifications
This device packs robust hardware into a tiny package. Its ESP-Shelly-C68F processor with 8 MB flash handles complex tasks smoothly. Electrical specs include max 240 V AC / 30 V DC switching, with ammeter and voltmeter for accurate AC measurements.
Wireless options shine: Wi-Fi (802.11 b/g/n/ax) reaches 30 m indoors/50 m outdoors; Bluetooth 5.0 up to 10 m indoors; Zigbee (802.15.4) extends to 100 m indoors/300 m outdoors. All at under 20 dBm RF power for safe operation.
Firmware features include 20 schedules, 20 webhooks (5 URLs each), full scripting, and MQTT support. Screw terminals take 0.4 Nm torque, and it needs external B/C circuit breakers (16 A max, 6 kA breaking).
Here are the key specs in a simple list:
- Dimensions: 37 x 42 x 16 mm (1.46 x 1.65 x 0.63 in)
- Weight: 30 g (1.06 oz)
- Power Supply: 110-240 V~ / 24 VDC ±10%
- Switching: 10 A/channel AC, 10 A DC
- Sensors: AC voltmeter, ammeter, temperature
- Connectivity: Wi-Fi, Bluetooth, Zigbee, Matter
- Protections: Energy limiting class 3## Connectivity & Integration
Integration is where it excels in home automation. Choose Wi-Fi for direct app control via the Shelly Cloud, or Zigbee for mesh networks without a hub. Matter support means it works with Apple HomeKit, Google Home, Alexa, and more out of the box.
Bluetooth simplifies local setup and pairing. Advanced users love MQTT, WebSocket, REST API, and scripting for custom logic. No CoAP, but HTTP actions and schedules cover most needs. Pair it with voice assistants for hands-free control: "Alexa, close the blinds" using its cover mode.
In any smart home, link it to sensors for automation. For example, trigger based on motion or temperature from other Shelly devices. It's perfect for SmartThings or Home Assistant via Zigbee or MQTT.
Use Cases
This device fits many smart home scenarios, thanks to dual channels and metering.
- Blinds and Shutters: Control position and slat angle for one motor. Automate sunrise/sunset schedules to save energy and boost privacy.
- Appliance Monitoring: Track power on fans, pumps, or heaters per channel. Spot inefficient devices and cut bills with energy savings.
- Lighting Control: Switch two light circuits independently. Integrate with smart lighting for scenes via app or voice control.
- Industrial Light: Monitor split loads like routers or valves. Use scripting for alerts on high usage.
- HVAC Fans: Automate based on internal temp sensor for energy efficiency.
These uses highlight its versatility for homes or facilities.
Setup & Getting Started
Getting it running is straightforward for DIY fans. First, power off the circuit. Mount in a wall box using the console. Wire channels to loads (same phase), neutral, and live. Torque screws to 0.4 Nm.
Download the Shelly Smart Control app (iOS/Android). Connect via Bluetooth for initial Wi-Fi setup. Scan QR code for Matter pairing if needed. The built-in web interface lets you configure modes: switch, cover, or metering. Test channels and calibrate for shutters.
Firmware updates happen over-the-air. For Zigbee, join a coordinator network. Scripting? Access via web for custom JS. Full guides in the app or knowledge base ensure quick troubleshooting.
Safety note: Use qualified electricians for installs. External breakers required.
Final Thoughts
This device delivers top-tier energy monitoring and control in a retrofit-friendly design. Its multi-protocol support, precise metering, and shutter smarts make it a standout for energy efficiency and home automation. Whether automating blinds, tracking usage, or building custom setups, it offers great value at 4.7 stars from 1200+ reviews.
Ideal for tech-savvy homeowners or pros seeking Zigbee and Matter without hubs. Pair with other Shelly gear for a full ecosystem. If you want reliable, compact power management, this device is a smart pick.