Full Smart Relays comparison in 2026
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| Feature | Shelly 1 Gen4 | Shelly 1 Mini Gen4 | Winner |
|---|---|---|---|
| Price | £25.15 | $24.98 | Shelly 1 Mini Gen4 |
| Rating | 4.4 | 4.5 | Shelly 1 Mini Gen4 |
| Warranty | 3 years | 3 years | Tie |
| Safety | Overheating protection | Overheating protection | Tie |
| Connectivity | 2.4 GHz WiFi, Bluetooth, Zigbee | 2.4 GHz WiFi, Bluetooth, Zigbee | Tie |
| Integrations | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | Tie |
| Relay Channels | 1 | 1 | Tie |
| Energy Monitoring | NO | NO | Tie |
| Dry Contact Mode | YES | YES | Tie |
| Wet Contact Mode | YES | YES | Tie |
| Zigbee Router | YES | YES | Tie |
| Local Control | YES | YES | Tie |
The Shelly 1 Gen4 switches up to 16A, the Shelly 1 Mini Gen4 up to 8A, or 2000 W resistive. Lighting circuits and garage door triggers sit comfortably under 8A; a water heater, a pump or a heavy appliance is where the full-size relay earns its place.
At 29 x 34 x 16 mm and 19 g, the Shelly 1 Mini Gen4 fits behind switches and inside fixture boxes where the 37 x 42 x 16 mm Shelly 1 Gen4 will not. In a shallow or crowded box, that is the difference between installing it and not.
Radios, integrations, DC input, contacts, neutral requirement and warranty are the same on both, and idle draw is about 1 W on either, so the choice comes down to load and space.
The Shelly 1 Mini Gen4 is noticeably smaller and fits where the full-size relay will not.
The Shelly 1 Gen4 handles up to 16A, twice the Mini's rating.
A momentary dry-contact trigger needs no more than the Shelly 1 Mini Gen4 offers, at a lower price.
Shelly 1 Mini Gen4 owners point out that this model is not UL or ETL listed.
Owners of both Gen4 relays praise the same things: local control that keeps schedules running without the internet, dry contacts that turn a garage door or a pool light into a smart device, and easy integration with Home Assistant. Both groups also mention that they need a neutral wire and can still be a tight fit when a box is packed. Shelly 1 Mini Gen4 owners single out how small it is, fitting where a standard relay would not, and its own web interface, but note tiny printed instructions, no UL or ETL listing and a few units that arrived dead or lost connection after months. Shelly 1 Gen4 owners talk more about choosing between Wi-Fi, Zigbee and Matter, and complain that pairing over Zigbee, with Hubitat especially, is fiddly and poorly documented.
Moving from the Shelly 1 Mini Gen4 to the Shelly 1 Gen4 buys one thing: load capacity, 16A instead of 8A. Radios, Matter, Zigbee router mode, contacts, DC input and the three-year warranty stay the same, and the full-size relay is bigger. If your Shelly 1 Mini Gen4 switches lights or triggers a door, there is nothing to gain; step up only for a load that goes past 8A.
The Shelly 1 Mini Gen4 for most installs, since it keeps the same Wi-Fi, Bluetooth, Zigbee and Matter support in a smaller, lower priced body. The Shelly 1 Gen4 is the one to buy when a load needs its 16A rating.
Two: size and load rating. The Shelly 1 Mini Gen4 measures 29 x 34 x 16 mm and switches up to 8A, while the Shelly 1 Gen4 measures 37 x 42 x 16 mm and switches up to 16A. Radios, integrations, contacts and warranty are the same.
Yes, both the Shelly 1 Gen4 and the Shelly 1 Mini Gen4 require a neutral wire, so check the switch box before buying either.
Yes. Both can run over Wi-Fi with Matter or join a Zigbee network through a hub, where they also act as Zigbee routers. They work with Alexa, Google Home, Apple Home, SmartThings and Home Assistant.
Anyone automating a circuit that draws more than 8A, such as a water heater or pump, who has room for the full-size relay and a neutral in the box.
DIYers retrofitting lights, garage doors or low-power loads in tight switch or fixture boxes who want Wi-Fi, Zigbee and Matter at a lower price.
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