Does this work with home assistant and sonoff zigbee dongle?

This is not zigbee but will work with home assistant if flashed with tasmota

I would like to know if it is normal for the switch to get hot within the first 10-15 minutes of use.

I’d say no, but then really depends how much current you’re passing through it.. my ones stay somewhat cool, room temp I’d say.

Does this have the option to connect the earth wire in UK circuits?

No, but it’s not required, you can just join the earth together

Can this be used to monitor power cuts? IE, if the power to the device is lost, can the app notify you?

Natively no, if there is a power cut this device will also stop functioning… since this is over Wi-Fi so would your internet ect and this the capability to see if it’s on or not… of course you could do it having a UPS and backup access to 4G (or similar) and some external monitoring tool.

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🔌 Power Meets Intelligence: Smart Living Awaits!

SAFETY FIRST - Automatic overload protection to keep your devices safe and sound.
REMOTE ACCESS - Turn devices on/off from anywhere, ensuring peace of mind.
STAY IN CONTROL - Monitor power consumption in real-time via a user-friendly app.
POWER UP YOUR LIFE - Transform high-powered devices into smart appliances effortlessly.
VOICE ACTIVATED CONVENIENCE - Compatible with Alexa and Google Home for hands-free control.

The SONOFF High Power Smart Switch Power Meter Switch (POWR3) is a cutting-edge device designed to elevate your home automation experience. With a maximum output of 25A/5500W, it allows you to control high-powered appliances remotely while monitoring their energy consumption through a dedicated app. Featuring robust overload protection and compatibility with voice assistants like Alexa and Google Home, the POWR3 ensures both safety and convenience in your smart home setup.

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