WiFi Smart Energy Meter & Circuit Breaker Review (2026)

The DEWIN WiFi Smart Energy Meter is a 2P 63A device designed to be installed within a UK consumer unit (fuse box). Unlike plug-in monitors, this device intercepts the load at the source, offering features like over-voltage and under-voltage protection alongside standard kWh tracking. It integrates with the Tuya/Smart Life ecosystem, allowing for remote switching and the creation of automated routines based on current, voltage, or power consumption thresholds.

In a real-world UK setting, this device is particularly useful for monitoring high-load appliances that aren't easily reached by smart plugs, such as electric showers, EV chargers, or immersion heaters. The LCD backlight provides clear local readings, while the app responsiveness is generally stable on 2.4GHz networks. However, users should be aware that WiFi signal strength can be an issue when the device is encased in a metal consumer unit.

Direct savings are indirect and depend entirely on user behaviour; simply installing the meter will not lower bills. However, by identifying 'phantom loads' or inefficient appliance cycles on specific circuits, a typical UK household could realistically identify and trim 5-10% of their annual electricity waste. The precise over-voltage protection may also marginally extend the lifespan of sensitive electronics during grid fluctuations.

Warning: This is not a DIY product. Installation requires internal access to the consumer unit and involves live mains wiring. A qualified UK electrician should be hired for installation to ensure compliance with BS 7671 wiring regulations.

Negligible. The device itself consumes less than 2W to maintain the WiFi connection and LCD screen, costing roughly £4-£5 per year at current UK price cap rates.