Shelly 1PM Gen4 vs Shelly Plus 2PM

The Shelly Plus 2PM, which controls two circuits, costs less and adds overvoltage, overcurrent and overpower protection. The Shelly 1PM Gen4 wins on integrations, including Apple HomeKit and Matter, and on acting as a Zigbee router.

Channels against connectivity. The Shelly Plus 2PM switches two loads from one module, while the Shelly 1PM Gen4 handles one but supports Matter, Apple HomeKit and Zigbee routing.

The Shelly 1PM Gen4, which lists Apple HomeKit and Matter alongside Google Home, Alexa, SmartThings and Home Assistant. The Shelly Plus 2PM covers Google Home, Alexa, SmartThings and Home Assistant.

The Shelly Plus 2PM, with overheating, overvoltage, overcurrent and overpower protection. The Shelly 1PM Gen4 does not list those protections.

Yes, both are PM models, so both report power consumption, the 2PM doing so per channel across its two outputs.

Buyers on Apple HomeKit or Matter who need one circuit controlled and want the module to double as a Zigbee router for nearby battery sensors.

Buyers with two loads in one box, such as a light and a fan or a pair of roller blinds, who want per-channel metering and the fullest protection set at a lower price.