An apparatus for charging a battery of a vehicle includes at least one photovoltaic cell that is adapted to convert solar insolation into electricity. The position of each photovoltaic cell is varied so that it faces toward a current location of the sun whether the vehicle is stationary or moving whenever the sun is visible. The apparatus is preferably disposed in a spoiler. The spoiler is either permanently attached to or is detachably-attachable with respect to the vehicle. The spoiler helps improve stability and handling at higher vehicle speeds as well as providing for the supplemental charging of the battery. The spoiler adds to the aesthetic appeal of the vehicle while helping to camouflage its primary purpose as that of a solar charging device.