Shelly 2PM Gen4 vs Shelly Plus 1

The Shelly 2PM Gen4 wins overall. It costs less, controls two 16A channels rather than one, meters both, adds full overheating, overvoltage, overcurrent and overpower protection, and supports Zigbee, Matter, Apple HomeKit and SmartThings. The Shelly Plus 1 wins only on dry contact modes and DC switching.

Capability per module. The Shelly 2PM Gen4 is a dual-channel metering relay with cover mode, a protection suite and Zigbee plus Matter support. The Shelly Plus 1 is a single-channel relay with no metering and no Matter, but it can isolate its contacts and switch a 30V DC load.

The Shelly Plus 1, if the controller expects a volt-free input, because it offers a true dry contact mode. The Shelly 2PM Gen4 does not, so it is better suited to mains loads such as lights, sockets and shutter motors, where its interlock and metering features shine.

No. Only the Shelly 2PM Gen4 supports Apple HomeKit and Matter, alongside Alexa, Google Home, SmartThings and Home Assistant. The Shelly Plus 1 has no HomeKit or Matter support and appears in the Apple Home app only through a bridge such as Home Assistant.

Buy the Shelly 2PM Gen4 if you want two independent 16A channels with per-channel consumption data, shutter control with obstacle detection, a complete protection set and the choice of Wi-Fi or Zigbee with Matter and HomeKit. It needs a neutral wire and carries a 3-year warranty.

Buy the Shelly Plus 1 when the install needs isolated dry contacts, for a gate, boiler or doorbell circuit, or when you are switching a low-voltage DC load up to 30V. It is UL listed, lists overheating protection and comes with a 3-year warranty.