The Shelly 1PM Gen4 is a smart WiFi relay with power consumption measurement that turns any circuit into a high-precision control and energy monitoring point. It measures the real-time power consumption of any appliance (up to 16A / 3680W) and helps you detect hidden consumption and reduce your electricity bill. Its main innovation is Gen4 multiprotocol connectivity: choose between WiFi, Bluetooth, Zigbee, or Matter for seamless integration into any smart home ecosystem. It operates locally, without a HUB or subscriptions, and executes automations via mJS scripts even if the internet goes down, all in an ultra-compact format that fits behind a switch.
Why choose the Shelly 1PM Gen4?
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Precise power consumption measurement: monitors real-time consumption and stores historical data in the cloud for free.
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Gen4 Multiprotocol: choose between WiFi, Bluetooth, Zigbee, or Matter depending on your setup.
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Ample power: up to 16A / 3680W, ideal for high-load appliances.
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No HUB or subscriptions: local and cloud control.
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Integrated protection: temperature sensor and overload and overvoltage protection.
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Compatible with everything: Alexa, Google Home, Apple Home (via Matter), Home Assistant, and iOS/Android apps.
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Designed for integrators: KNXnet/IP, documented HTTP API, MQTT(s), WebSockets, Webhooks, and mJS scripting.
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3-year manufacturer's warranty.
Key Features
- 1-channel smart WiFi, Bluetooth, and Zigbee relay (16A)
- Real-time electricity consumption measurement
- No HUB required
- Matter compatible
- Free cloud storage for energy analysis
- Supports KNXnet/IP and multiple automation protocols
- WiFi/Zigbee range extender and Bluetooth Low Energy (BLE) gateway
- Compatible with Alexa and Google Home
- iOS and Android app
Technical Specifications
| Model |
S4SW-001P16EU |
| Power supply |
110 - 240 VAC (±10%, 50/60 Hz) / 24 - 30 VDC |
| Power consumption |
< 1.2W |
| Max. switching current |
16 A (240 V~) / 10 A (30 V⎓) |
| Max. load |
3680 W (AC) |
| Power measurement |
Yes, real-time |
| Connectivity |
WiFi 2.4 GHz
Bluetooth 5.0
Zigbee 3.0 |
| Matter compatible |
Yes |
| Protection |
Temperature sensor, overload, and overvoltage |
| Mounting |
Wall / switch box |
| Material |
Plastic |
| Working temperature |
-20°C to 40°C |
| WiFi/Zigbee range extender |
Yes |
| BLE gateway |
Yes |
| Scripting (mJS) |
Yes |
| MQTT |
Yes |
| KNXnet/IP |
Yes |
| Dimensions |
42 x 37 x 16 mm (approx.) |
