The company says new technology to sense the voltage remotely at the battery allows charging at a higher voltage, which further increases efficiency.

A truck’s alternator converts mechanical power from the engine to electricity, which it uses to power all the truck’s electrical systems and keep batteries charged.

New low-speed alternators can deliver up to 180 amps of current, even when a vehicle is driving at speeds well below those reached on motorways – experts suggest their efficiency has risen from a low of 55% several decades ago to as high 80% today.