Verified AliExpress match to the Shelly 2PM Smart Switch

Not exactly, the GreatScott! video features the Shelly 2PM (Gen1/Gen2), while this AliExpress listing is the Gen3. Gen3 is the same product family from the same manufacturer but adds Bluetooth and KNXnet/IP support. The core dual-channel 16 A relay function is identical; the difference is additional radio and protocol capability in Gen3, not a downgrade.

The listing confirms Alexa and Google Home compatibility. Apple HomeKit is not listed as a native integration for the Shelly 2PM Gen3; Shelly devices can be bridged to HomeKit via third-party software (e.g., Homebridge) but this requires additional setup. If HomeKit is your primary ecosystem, verify current firmware support before purchasing.

KNXnet/IP lets the Shelly 2PM Gen3 communicate with KNX building-automation systems over your IP network, without a separate KNX gateway. This is the exact hybrid use case covered in the GreatScott! video, replacing traditional KNX switches with a relay that still speaks the KNX protocol. If your installation has no KNX infrastructure, this feature has no practical effect.

For the majority of smart-home relay installations, Wi-Fi alone is sufficient. Bluetooth on the Gen3 is primarily used for initial device provisioning and direct local control when Wi-Fi is unavailable. It can also reduce dependency on a router during first-time setup. If your home already has reliable 2.4 GHz Wi-Fi coverage at the install location, Bluetooth adds convenience but is not essential.

The Shelly app (iOS and Android) is available globally and functions without a mandatory subscription. Local control over Wi-Fi does not require a cloud connection once the device is set up. Shelly's cloud services are free; advanced automations and remote access are included at no additional charge as of current firmware, though this is subject to change by the manufacturer.

Yes, the 2PM's two-channel output is specifically designed for roller shutter and blind motor control, with built-in safety logic to prevent both channels from activating simultaneously. Wiring requires a neutral line; installations without a neutral wire (switched-live only) are not supported. The device is rated for 16 A per channel, compatible with most residential motor loads.