Shelly 1PM Gen4

The Shelly 1PM Gen4 is a 16A smart relay designed for easy retrofitting and remote control via the free Shelly app. It provides 1%‑accurate power monitoring with local or cloud storage options, features an upgraded chipset and more RAM than the Gen3, and supports Matter and Zigbee for seamless smart‑home integration.

Compatibility

Shelly 1PM Gen4 is compatible with the following systems:
Zigbee CompatibleWi-Fi Compatible DeviceMatter Compatible

Price range: £21.07 through £80.89

SKU: 1PM-GEN4 | 1PM-GEN4-2 | 1PM-GEN4-4 Category:

Description

The Shelly 1PM Gen4 is a single‑channel smart relay capable of handling loads up to 16A, making it a practical solution for upgrading existing electrical devices at home or in the workplace. It requires no specialised wiring or additional hubs, and is designed for easy retrofitting inside standard electrical boxes or behind light switches. Once installed, it can operate on its own for simple remote control or be integrated into advanced, customisable automations and multi‑device scenes.

As the successor to the Shelly Plus 1PM Gen3, the 1PM Gen4 introduces a range of enhancements and new capabilities. Alongside a faster chipset and increased RAM, the Gen4 lineup adds support for Zigbee and Matter, in addition to the existing Bluetooth and Wi‑Fi connectivity. Each relay can maintain all these connections simultaneously, enabling the 1PM Gen4 to work seamlessly with older Shelly Wi‑Fi networks as well as existing Zigbee or Matter ecosystems, all without the need for an extra hub.

Key features:

  • Built-in WiFi; no hub required
  • Bluetooth connectivity
  • Embedded web server for local management
  • 1 channel switch, 16A
  • Power metering
  • Smart schedules
  • Smart scenes
  • Automatic sunrise/sunset schedules
  • Automatic on/off timer

What’s included:

  • 1 x 1PM-GEN4
  • 1 x Installation guide

Product Specifications

Physical and Performance Attributes

Weight27 grams
Dimensions (L x W x H)37 × 42 × 16 mm