Comparison of Shelly 1, 2, and PM?
Shelly offers compact Wi-Fi modules for the smart control of lights, sockets, roller shutters, and other electrical devices.
The devices can be installed directly behind existing switches and enable simple home automation.
| Device | Description of the | Properties |
|---|---|---|
| Shelly 1 Gen4 | Compact smart relay for easy switching of electrical devices on and off. | – 1 channel- no power measurement- Wi-Fi control- very compact |
| Shelly 1PM Gen4 | Smart relays with integrated current measurement for monitoring energy consumption. | – 1-channel power measurement – Wi-Fi control – energy monitoring |
| Shelly 2PM Gen4 | Smart home module for roller shutters or two separate circuits with energy monitoring. | – 2 channels – Power measurement – Roller shutter control – Wi-Fi control |
Benefits of Shelly
✅ Easy to install behind existing switches
✅ Control via smartphone app
✅ Compatible with Alexa & Google Home
✅ Measure energy consumption
✅ Automations & schedules
Make your home smart with Shelly smart home solutions.
| Model | Channels | Performance measurement | Supply | Typical uses |
|---|---|---|---|---|
| Shelly 1 Gen4 | 1 | No | 110–240 V AC / 12 V DC / 24–48 V DC | Light, socket |
| Shelly 1PM Gen4 | 1 | Yes | 110–240 V AC / 24–30 V DC | Lighting + Electricity consumption |
| Shelly 2PM Gen4 | 2 | Yes | 110–240V AC / 24V DC | Roller shutters, 2 circuits |
Installing a Shelly smart home module
To give you a better idea of the installation process, we have included a video for each of the Shelly devices featured. The videos show how to connect and set up the modules.
Shelly 1 Gen4s
This video shows how to install the Shelly 1 Gen4, which is ideal for easily switching lights or other electrical appliances on and off.
Shelly 1PM Gen4
This guide explains how to install the Shelly 1PM Gen4. This module also allows you to measure electricity consumption.
Shelly 2PM Gen4
This video demonstrates how to install the Shelly 2PM Gen4, which is particularly suitable for controlling roller shutters or two electrical circuits.