BiaHawn 7.4kW Smart EV Home Charger Review

The BiaHawn 7.4kW EV Home Charger is a single-phase AC wallbox designed for the UK market, delivering up to 32 amps of power. Its standout physical feature is the 4.3-inch LCD screen, which provides immediate feedback on voltage, current, and charging time—a luxury often missing from minimalist competitors. Built with an IP65 rating, it is robust enough for external mounting on a driveway or garage wall. It includes Type 2 compatibility, making it suitable for the vast majority of modern electric vehicles and plug-in hybrids sold in the UK.

In daily use, the 8-metre cable provides significantly more flexibility than the standard 5-metre cables often bundled with home chargers, easily reaching across double driveways. The interface is intuitive, and the built-in RCBO (Residual Current Breaker with Overload protection) simplifies the internal safety setup. However, the software app experience can feel less polished than premium ECO-smart chargers, and users may find the 'smart' scheduling occasionally requires a firm Wi-Fi signal to remain consistent.

By switching from a standard 3-pin 'granny' charger to this 7.4kW unit, users can fully charge a standard 60kWh EV in roughly 8 hours compared to 18-24 hours. Real-world savings in the UK depend heavily on utilising 'Time of Use' (ToU) tariffs, such as Octopus Intelligent or OVO Charge Anytime. Using this charger to schedule sessions between 12am and 5am could potentially reduce annual fuel costs by over £400 compared to charging at peak standard variable rates, depending on mileage.

Installation must be carried out by a qualified OZEV-certified electrician. The unit includes PEN protection and a built-in RCBO, which may reduce the need for an earth rod in many UK installations, potentially lowering the installation labour cost.

Beyond the electricity consumed, the unit has a negligible standby power draw of less than 3W. Maintenance is minimal, though the 8m tethered cable should be coiled properly in the included holder to prevent wear on the connectors.