A series hybrid is a type of hybrid vehicle that uses an internal combustion engine to generate electricity, which then powers an electric motor that drives the wheels. In this system, the engine does not directly drive the wheels; instead, it acts as a generator to recharge the battery or supply power to the electric motor. This design allows for greater efficiency, as the engine can operate at its optimal speed and load, reducing fuel consumption and emissions. Series hybrids often feature a battery that stores energy, enabling the vehicle to run on electric power alone for short distances, enhancing overall performance and sustainability.