Smart Meter Single-Phase AC 63A 80-400V WiFi Energy Meter Review

The Chatthen Smart Meter is a single-phase energy monitor designed for installation on a standard 35mm DIN rail. It supports currents up to 63A and operates across a wide voltage range of 80-400V, making it suitable for UK domestic and light industrial applications. Beyond simple tracking, it includes safety features such as earth leakage protection and over/under voltage cut-offs. Integration with the Smart Life app allows for remote control of the circuit and historical data logging, providing a digital overview of power consumption directly on your smartphone.

In a UK household context, this device is most effective when used to monitor high-drain appliances or outbuildings, such as a garden office or a garage conversion. The WiFi connectivity is generally stable, but users should ensure their router signal reaches the consumer unit, which is often shielded by metal casing. The 'Smart Life' app integration is a highlight, allowing for the creation of automation routines, though the interface for electricity cost calculation may require manual tariff input to be accurate.

The device itself does not actively save energy; rather, it provides the data necessary for behavioral change. By identifying 'vampire' loads or excessive usage in specific zones, a UK household might realistically reduce their bill by 5-10% through more informed appliance use. The potential £ savings are highly dependent on the user's proactive response to the consumption data provided and the current price per kWh under the energy price cap.

This is not a 'plug-and-play' consumer device. It must be installed by a qualified electrician as it involves working within the consumer unit (fuse box) and handling mains wiring. Ensure there is enough physical space on the DIN rail before purchasing.

The unit consumes a negligible amount of power to maintain its WiFi connection and display, typically costing less than £2-£3 per year at current UK electricity rates.