A solar car operates by the collection and conversion of sunlight into electricity. Using solar cells mounted on the vehicle, collected energy is delivered to the car's batteries or motor. Generally, a car can operate on only 700-1500 watts of power. With such small amounts of energy available, efficiency is crucial. Aerodynamic drag, weight, and rolling resistance all influence the car's design.
Solar energy is converted directly to electricity by the photovoltaic array.
Electric energy is stored in batteries. Solar electricity can also go directly to the motor when the car is running. Modern electronic motor controllers smoothly and efficiently control power to the motor. Speed control is by a normal accelerator pedal. The latest in motor technology uses powerful rare-earth magnets and a brushless design.