Wrapped in a Photovoltaic Skin, Student-Designed EV Generates More Energy Than It Uses

Passenger cars spend the vast majority of their time parked in various locations. Clemson University’s Deep Orange 17 project began with this straightforward observation, asking what all those stationary hours could contribute to an electric vehicle. Graduate automotive engineering students collaborated with BMW of North America to develop a fully functional prototype named Luminetta, covering its exterior with 1,781 photovoltaic cells. These cells harvest energy while the vehicle is in motion and continue working once it comes to a complete stop, turning time spent under the sun into part of the vehicle's charging cycle.

BMW challenged the student team to engineer an electric vehicle capable of generating more energy than it consumes over a standard 24-hour urban commuting cycle. The students broadened the traditional efficiency equation to incorporate the long periods between drives. In a modeled scenario based on a 12-mile commute, the solar system generated enough surplus energy to provide an average of 31 additional miles of range. This concept relies heavily on where the car spends its time, making the parking space nearly as crucial as the road itself.

Stock photo for illustration only, not from the actual event

Solar power anchors Luminetta's propulsion strategy. Working alongside the team at the Fraunhofer Institute for Solar Energy Systems ISE, the Clemson students integrated photovoltaic cells directly across the exterior surfaces, transforming the car's outer skin into an active energy-harvesting area. The system is engineered to keep producing electricity even when sections fall into shadow, a vital detail for a vehicle navigating past trees and buildings or remaining parked beside them for hours.

The two-door coupe maintains a recognizable road-car silhouette rather than adopting the extremely flat proportions typical of solar racing cars. Its aerodynamic form draws inspiration from the boxfish, whose compact body unites low drag with practical internal volume, while its broader visual styling references BMW's rich design heritage.

Luminetta becomes even more compelling when looking beyond the solar skin. The vehicle weighs a mere 550 kilograms (1,212 pounds), roughly a quarter of the weight of many comparably sized production cars. This minimal mass cuts down the baseline energy required by the car, allowing the relatively small amount of power gathered from sunlight to exert a dramatic effect on its driving range. The chassis utilizes structural steel around passenger safety zones, while aluminum reduces weight across other sections alongside 3D-printed metal joints connected to carbon-fiber structural members.