Hybrid Electric Vehicle (HEV) combines the innovation of electric vehicles with gas-powered technology. The advanced HEV includes an electric motor, an internal combustion engine (ICE, also known as a gasoline engine) and a battery. The power is generated by the electric motor acting as a generator to save and store energy, known as regenerative braking. In addition to this, traditional gasoline runs the gas engine.
A plug-in hybrid vehicle (PHEV) has two engines: a gas-powered one and an electric engine. The electric engine that can be plugged in for charging is the primary power source, with the gas-powered engine being utilized once the electric motor runs out of battery.
Battery Electric Vehicle (EV) is the most advanced of the energy-efficient vehicles, offering a 100% battery-powered engined. Having only an electric engine, the vehicle is plugged in to restore its full power.