Utility Factor refers to the percentage of driving powered by electricity in a plug-in hybrid electric vehicle (PHEV). It measures the extent to which a PHEV relies on its electric motor versus its internal combustion engine. A higher utility factor indicates that the vehicle is using electric power for a greater portion of its driving, which reduces fuel consumption and greenhouse gas emissions. The utility factor can vary depending on the driver’s habits, such as how often they charge the vehicle and the distance of their regular trips.
