Shelly 1PM Gen4
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Our take on the Shelly 1PM Gen4
The Shelly 1PM Gen4 is a small Wi-Fi and Bluetooth smart relay that fits behind a wall switch or inside a junction box. It switches loads up to 16 A and reports real-time power consumption, so you can automate lights, heaters or appliances and track what they use. It also works as a Zigbee device and with Amazon Alexa. It is a DIY-style module, not a plug-in smart plug, so wiring knowledge is required.
- Fits behind most wall switches at about 1.7 by 1.5 inches
- Measures real-time power and energy use
- Works over Wi-Fi and Bluetooth, plus Zigbee
- Local control without a cloud account
- Supports Alexa voice control and remote control
Shelly 1PM Gen4 prices at every store
- Best BuyNew
Out of stock
$28.99Verified
Store links may earn us a commission. Price via Klarna.
Shelly 1PM Gen4 price history
Lowest price we've seen: $28.99 on Nov 7 at Best Buy. Tracked across 1 store since Nov 7.
Specifications
Questions and answers
- What is the Shelly 1PM Gen4 used for?
- It is a relay module that goes behind a switch or in a junction box to make a wired load smart. It switches up to 16 A and reports power consumption.
- Does it need a neutral wire?
- Yes. The 1PM Gen4 needs live and neutral to power the module, so check your switch box before buying.
- Does it work with Alexa?
- Yes. It supports Amazon Alexa voice control, and it also works locally through the Shelly app and over Wi-Fi, Bluetooth and Zigbee.
- Can it measure energy use?
- Yes. It reports real-time power and accumulated energy, which lets you see what a connected appliance costs to run.
- Is the Shelly 1PM Gen4 a plug-in device?
- No. It is a bare module for fixed wiring; you supply the switch, box and wiring, and installation should follow local electrical codes.
