Industry jargon

Range-extended electric vehicle

Also called: REEV, REX, range extender A range-extended electric vehicle is driven by an electric motor but carries a small internal combustion engine that can generate electricity when additional range is needed. The engine acts as an onboard generator rather than the normal mechanical drive source. UK vehicle definitions treat a range-extended electric vehicle as a special case of plug-in hybrid. The battery can be charged from an external electricity supply as well as from the onboard generator. The distinction from many PHEVs is drivetrain layout: a REEV is intended to drive electrically while the combustion engine supplies electrical energy rather than routinely driving the wheels.