2026 verdict
For roller shutters or two lighting circuits in one back box, the
Shelly 2PM Gen3 is the better buy, metering each channel and protecting against overload.
It has two relay channels at 16A, a cover mode for shutters, blinds and gates, and overheating, overvoltage, overcurrent and overpower protection. The
Shelly 1 Gen3 is the cheaper single-channel relay and the only one of the two with dry contacts, the potential-free output that garage doors, gates and boilers need, but it measures nothing. Both are Gen3 Shelly modules with Wi-Fi, Bluetooth and Matter, a 16A rating, a three-year warranty and support for Alexa, Google Home, Apple Home, SmartThings and Home Assistant. Pick the
Shelly 2PM Gen3 for shutters and metered circuits, and the
Shelly 1 Gen3 for a single light or a dry-contact job.
What owners say
Owners of both Gen3 relays agree on stable Wi-Fi and a Home Assistant integration that runs locally without trouble. Shelly 1 Gen3 owners describe it as a Swiss army relay, hidden behind a switch for lights or wired as a dry contact for garage doors, sump pumps, pool filtration and solar setups, and power users value its scripting and ESPHome support; they miss energy monitoring and warn about tight boxes and DC installs that need real electrical skill. Shelly 2PM Gen3 owners praise per-channel metering and use it to replace ageing roller shutter actuators, often going from unboxing to a working automation in minutes; a vocal minority struggled to join Wi-Fi through the app or add it to Alexa, and some note the Gen3 casing is a little thicker than the Gen2 one.
