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.

£21.98 inc VAT

SKU: 1PM-GEN4 Category:

Compatibility

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

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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

Misc Product Attributes

Category Specification Value
Physical Size (HxWxD) 37×42×16 mm / 1.46×1.65×0.63 in
Weight 27 g / 0.95 oz
Screw terminals max torque 0.4 Nm / 3.5 lbin
Conductor cross section 0.5–4 mm² / 20–11 AWG (solid, stranded, ferrules)
Conductor stripped length 6–7 mm / 0.24–0.28 in
Mounting Wall console
Shell material Plastic
Shell color Red
Terminals color Grey (Mouse Grey)
Environmental Ambient working temperature -20 °C to 40 °C / -5 °F to 105 °F
Humidity 30% to 70% RH
Max. altitude 2000 m / 6562 ft
Electrical Power supply 110–240 V~
24–30 V⎓
Power consumption < 1 W
Neutral not needed No
External protection Cable protection switch (EN60898‑1, B/C curve, max 16 A, min 6 kA, class 3)
Output circuit ratings Max switching voltage: 240 V~ / 30 V⎓
Max switching current: 16 A (240 V~), 10 A (30 V⎓)
Sensors / Meters Voltmeter (AC) Yes
Ammeter (AC) Yes
Internal temperature sensor Yes
Wi‑Fi Protocol 802.11 b/g/n/ax
RF band 2412–2472 MHz
Max RF power < 20 dBm
Range Up to 30 m / 100 ft indoors; 50 m / 160 ft outdoors (conditions vary)
Bluetooth Protocol 5.0
RF band 2402–2480 MHz
Max RF power < 4 dBm
Range Up to 10 m / 33 ft indoors; 30 m / 100 ft outdoors (conditions vary)
Zigbee Protocol 802.15.4
Zigbee repeater Yes
RF band 2400–2483.5 MHz
Range Up to 100 m / 328 ft indoors; 300 m / 984 ft outdoors (conditions vary)
Microcontroller CPU ESP‑Shelly‑C68F
Flash 8 MB
Firmware Capabilities Schedules 20
Webhooks 20 (5 URLs per hook)
Scripting Yes
MQTT Yes