Shelly 1 Mini Gen3 vs Shelly Plus 1PM

The Shelly Plus 1PM wins overall. It adds energy monitoring, full overheating, overvoltage, overcurrent and overpower protection, a higher 16A rating and better owner ratings. The Shelly 1 Mini Gen3 is cheaper, much smaller and supports Matter, which the Plus 1PM does not.

Metering and protection. The Shelly Plus 1PM reports power, voltage, current and total consumption and guards the circuit against overheating, overvoltage, overcurrent and overpower. The Shelly 1 Mini Gen3 has no energy monitoring and lists only overheating protection, but it is far smaller and cheaper.

The Shelly Plus 1PM, rated for 16A on AC and 10A on low-voltage DC. The Shelly 1 Mini Gen3 is rated for 8A and up to 2000W on AC, and 5A and 150W on DC, so it suits lighting, small pumps and gate motors rather than heaters or high-current appliances.

Only the Shelly 1 Mini Gen3, which works with Matter as well as Alexa, Google Home, SmartThings and Home Assistant. The Shelly Plus 1PM has no Matter or Apple HomeKit support, so it reaches those platforms only through Shelly's own integrations or a bridge.

Buy the Shelly Plus 1PM if you want to switch a 16A circuit, know exactly what it draws and have overheating, overvoltage, overcurrent and overpower protection watching it. It suits water heaters, pumps and appliances, offers dry and wet contact modes and carries a 3-year warranty.

Buy the Shelly 1 Mini Gen3 when space is tight or the budget is small: it is one of the smallest smart relays available, keeps the manual switch working, supports dry and wet contacts and Matter, and handles lighting-scale loads with fast local control and a 3-year warranty.