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Relays · Head to head

Shelly 1 Mini Gen3 vs Shelly 2PM Gen4

Full Smart Relays comparison in 2026

Updated September 2026
Data from Amazon and official Shelly site.
2026 verdict
If you want the more capable smart relay, the Shelly 2PM Gen4 is the winner: two channels rated 16A each, per-channel energy monitoring and a Zigbee radio, all in a module that still fits behind a switch.
Shelly 2PM Gen4
Winner
Shelly 2PM Gen4
$38.99
Buy on Amazon USACheck price
The Shelly 1 Mini Gen3 is the smaller, cheaper single-channel relay, rated 8A, and it documents dry-contact and wet-contact modes for jobs like a garage door or a sprinkler valve, which the Shelly 2PM Gen4 sheet leaves unconfirmed. Both need a neutral wire, both run on 2.4 GHz Wi-Fi with Matter, Alexa, Google Home, Apple Home, SmartThings and Home Assistant support, and both ship with a 3-year warranty. The 2PM Gen4 adds overvoltage, overcurrent and overpower protection, where the Mini Gen3 lists only overheating protection. Choose the Shelly 2PM Gen4 for two circuits, shutters or metering, and the Shelly 1 Mini Gen3 for one light or one trigger in a crowded box.
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FeatureShelly 1 Mini Gen3Shelly 2PM Gen4Winner
Price$17.99$38.99Shelly 1 Mini Gen3
Rating4.54.6Shelly 2PM Gen4
SafetyOverheating protectionOverheating protection, Overvoltage protection, Overcurrent protection, Overpower protectionShelly 2PM Gen4
Relay Channels12Shelly 2PM Gen4
Energy MonitoringNOYESShelly 2PM Gen4
Zigbee RouterNOYESShelly 2PM Gen4
Warranty3 years3 yearsTie
Connectivity2.4 GHz WiFi, BluetoothBluetooth, ZigbeeTie
IntegrationsGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterTie

What the differences mean

Number of channels

The Shelly 2PM Gen4 switches two circuits from one module, which is two light groups in a double gang box or one roller shutter motor. The Shelly 1 Mini Gen3 has a single channel, so a second circuit means a second unit.

Load rating

The Shelly 2PM Gen4 is rated 16A per channel and the Shelly 1 Mini Gen3 8A, or 2000W resistive. For lighting either is plenty, but a water heater, a pump or a heavy motor belongs on the higher rating.

Energy monitoring

The Shelly 2PM Gen4 reports power use per channel, so you can see what a heater or a pump draws. The Shelly 1 Mini Gen3 has no metering at all, which is fine for a light and a limitation for anything you want to track.

Radios and mesh role

The Shelly 2PM Gen4 adds Zigbee and can act as a Zigbee router, while the Shelly 1 Mini Gen3 is Wi-Fi and Bluetooth for pairing only. If you already run a Zigbee network, the Gen4 module also strengthens it.

Protection and contact modes

The Shelly 2PM Gen4 lists overheating, overvoltage, overcurrent and overpower protection against overheating alone on the Shelly 1 Mini Gen3. In return, only the Mini Gen3 documents dry-contact and wet-contact modes.

Which one to buy if

  • you need to automate roller shutters or blinds
    Shelly 2PM Gen4

    The Shelly 2PM Gen4 has an interlock mode built for two-direction motors, and owners describe reliable scheduled open and close with obstacle detection.

  • you just need one light or one appliance made smart in a tight junction box
    Shelly 1 Mini Gen3

    The Shelly 1 Mini Gen3 is the smaller of the two at 29 x 35 x 16 mm and does the single-channel job without paying for a second channel.

  • you want to open a garage door or trigger a sprinkler valve
    Shelly 1 Mini Gen3

    The Shelly 1 Mini Gen3 documents both dry-contact and wet-contact modes, which is what those low-voltage triggers use.

  • you want to see how much power a heater or pump uses
    Shelly 2PM Gen4

    The Shelly 2PM Gen4 measures energy per channel and handles up to 16A per channel.

  • your smart home already runs on Zigbee
    Shelly 2PM Gen4

    The Shelly 2PM Gen4 has a Zigbee radio and can serve as a router, which the Shelly 1 Mini Gen3 cannot.

What owners say

Owners of both Shelly relays praise local control that answers instantly without the cloud, clean Home Assistant integration and regular over-the-air updates. They also agree on the entry ticket: both need a neutral wire and some comfort with mains wiring. Shelly 1 Mini Gen3 owners single out the tiny size, the dry contacts that solve garage doors, sprinklers and fireplaces, and the ability to configure it through its own web page; their loudest complaint is a wiring diagram that reads as if the I and O terminals were a power output. Shelly 2PM Gen4 owners single out smooth roller shutter automation with obstacle detection and the built-in energy readings, while a few describe switching the module into Zigbee mode as fiddly, and note it has no physical on/off button.

Price history compared

Every price change of both, in the same store, so the gap between the two lines is what one costs more than the other.

  • Shelly 1 Mini Gen3
  • Shelly 2PM Gen4

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Frequently Asked Questions

Which is better overall: Shelly 1 Mini Gen3 or Shelly 2PM Gen4?

The Shelly 2PM Gen4 is the more capable relay, with two 16A channels, energy monitoring, Zigbee and a fuller protection set. The Shelly 1 Mini Gen3 is the better fit only when you need one channel in the smallest and cheapest package.

What is the difference between Shelly Gen3 and Gen4 relays, such as the Shelly 1 Mini Gen3 and the Shelly 2PM Gen4?

Here the difference is mostly the model, not the generation alone. The Shelly 2PM Gen4 has two channels at 16A, per-channel energy monitoring, Zigbee and an interlock mode for shutters, while the Shelly 1 Mini Gen3 is a single-channel 8A relay with Wi-Fi only. Both list Matter support.

Do the Shelly 1 Mini Gen3 and the Shelly 2PM Gen4 need a neutral wire?

Yes, both list a neutral wire as required, so neither suits an older switch box without one. Both work on 110-240 V AC.

Which one works with Apple Home, Alexa and Google Home?

Both. The Shelly 1 Mini Gen3 and the Shelly 2PM Gen4 list Alexa, Google Home, Apple Home, SmartThings, Home Assistant and Matter support, so the ecosystem should not decide between them.

Who should buy the Shelly 1 Mini Gen3?

DIYers who want one smart channel in a small space, especially for a garage door, sprinkler valve or a single light where dry-contact or wet-contact wiring is needed.

Who should buy the Shelly 2PM Gen4?

Buyers who need two circuits or a roller shutter from one module, want per-channel energy readings, run loads up to 16A, or want a Zigbee router in the same box.

Full comparison table

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