Shelly 2PM Gen4 WiFi & Zigbee Operated Relay with Power Metering

The Shelly 2PM Gen4 WiFi & Zigbee Relay with Power Metering is a versatile two-channel smart relay module designed for modern smart-home automation. It fits behind existing light switches, sockets, or inside junction boxes, enabling control of devices, lights, blinds, shutters, or other appliances without visible hardware. The device combines compact form factor with broad connectivity and built-in energy monitoring for a clean, efficient installation and flexible control.

With support for multiple communication protocols — WiFi, Zigbee, Bluetooth, and the emerging Matter standard — the 2PM Gen4 adapts easily to most smart-home ecosystems. Its dual-channel design lets you independently control two circuits or loads, making it suitable for dual lighting circuits, a light plus a blind motor, or two separate appliances. Integrated power metering per channel provides real-time insight into energy consumption, helping you monitor usage and optimise energy efficiency across your home.

Key Features

• Dual-Channel Smart Switching: Independently control two circuits or loads from a single compact relay, enabling flexible wiring configurations such as separate lights, blinds, or appliances.
• Multi-Protocol Connectivity: Supports WiFi, Zigbee, Bluetooth, and Matter — allowing seamless integration into a wide range of smart-home systems and future-proofing your setup.
• Per-Channel Power Metering: Built-in energy measurement tracks consumption for each channel in real time, giving visibility of power usage for lights, motors or appliances.
• Compact Retrofit Design: Small form factor fits standard wall boxes or behind existing fixtures, making it ideal for retrofits and installations where space is limited.
• Motor & Blind Control Support: Capable of driving bi-directional AC motors for blinds, shutters, awnings or curtains, including support for position and slat-angle control where applicable.
• Local and Remote Operation: Operates via embedded web interface or the Shelly app, supports local-network control or cloud integration, and works with automation, scheduling, scenes, scripting, MQTT, webhooks and APIs.

Technical Specifications

• Switch type: Dual-channel smart relay
• Maximum load per channel: 10 A AC (total 16 A continuous, 18 A peak) or 10 A / 30 V DC
• Supply voltage: 110–240 V AC or 24–30 V DC
• Power consumption: < 1 W
• Power measurement: Yes — real-time energy and power metering per channel
• Connectivity: WiFi (802.11 b/g/n/ax, 2.4 GHz), Zigbee 3.0, Bluetooth, Matter compatible
• Dimensions: 37 × 42 × 16 mm; Weight: ~30 g
• Operating environment: –20 °C to +40 °C ambient temperature; humidity 30–70% RH
• Mounting: Flush behind standard wall boxes, sockets or light switches

Use Cases

• Automating lighting circuits or appliances in homes and offices while preserving existing switch and socket layouts.
• Controlling motorised blinds, roller shutters, awnings or curtains — with support for both switching and position/slat-angle control.
• Monitoring energy consumption per device or circuit to identify high-usage loads and optimise electricity usage.
• Integrating into comprehensive smart-home systems (voice control, scheduling, scenes, automation and energy-based triggers) across platforms such as Apple HomeKit, Google Home, SmartThings or Home Assistant.
• Retrofitting older properties with smart automation in a minimal and unobtrusive way, thanks to the compact relay size and flexible wiring options.