HOW EV MAKERS CAN WIN THE RACE TO 5.0MPKWH

Manufacturers are honing every detail to close in on big efficiency goal

- JULIAN RENDELL

Scrutinise the spec of an electric car and there's a figure in miles per kilowatt hour (mpkWh) for vehicle energy efficiency, typically an average of between 3.0 and 4.0.

There's no doubt efficiency is important, both for engineers, who use it as a yardstick of achievement, and for drivers, for whom it is the key to understanding battery range.