How Is Fuel Efficiency Measured In Electric Vehicles Meaning. The fuel efficiency of an electric car is measured in kilometres per kwh. Fuel cell electric vehicles (fcevs) are a type of electric vehicle that generate electricity using a fuel cell powered by hydrogen rather than storing energy in a.
This is measured in kilowatt hours (kwh). Electric vehicle battery size is expressed in terms of how much power the battery will hold, just like the litres in a fuel tank.