Clemson University has unveiled Deep Orange 17, a solar-integrated electric vehicle prototype that produced an average of 31 miles (50 kilometers) of additional driving range from surplus solar energy in student modeling of a 12-mile (20-kilometer) daily commute. The two-door coupe, named Luminetta, was developed by graduate automotive engineering students alongside BMW’s research and development team, which set the challenge in the fall of 2024. Clemson says Deep Orange 17 combines solar generation, lightweight construction and intelligent vehicle controls to demonstrate that energy-positive mobility is possible.
Highlights
- More than 1,700 photovoltaic cells are integrated directly into the vehicle’s exterior surfaces, harvesting energy both parked and in motion.
- The prototype weighs 1,212 pounds (550 kilograms), approximately one-fourth the weight of many similarly sized production vehicles.
- Modeling across Greenville, South Carolina; Frankfurt, Germany; Madrid, Spain; and Mumbai, India produced an average of 31 miles (50 kilometers) of surplus range on a 12-mile (20-kilometer) commute.
- Sixteen graduate students developed the vehicle over two years, and it is scheduled to appear at the 2027 Consumer Electronics Show in Las Vegas.
A Challenge to Build an Energy-Positive Vehicle
In the fall of 2024, BMW asked the Deep Orange graduate team whether a vehicle could generate more energy than it consumes during everyday driving. Rather than optimizing solely for standardized driving cycles, the students focused on how people actually use their vehicles: passenger cars spend most of their time parked, which creates opportunities to harvest solar energy throughout the day. The team also designed the vehicle to capture sunlight while driving.
BMW has served as primary sponsor for five Deep Orange projects, including this one, according to the university.
“This is a project we’ve wanted to pursue for years, so it’s incredibly rewarding to see this group of students come together over the last two years, overcome so many technical challenges and constraints, and bring an energy-positive vehicle to life,” said Stephan Augustin, Project Manager of Research and New Technologies at BMW.
How Does the Solar System Generate Surplus Energy?
Solar power functions as a core element of the propulsion strategy rather than an auxiliary feature. More than 1,700 photovoltaic cells are integrated into the vehicle’s exterior surfaces, allowing the body itself to generate power while parked and in motion, and the system continuously replenishes onboard energy storage to offset consumption during daily driving.
The panels were developed with the Fraunhofer Institute for Solar Energy Systems ISE and use a construction that continues generating power when portions of the array are shaded. A durable outer film protects the cells, with its color created through a laser manufacturing process.
To evaluate real-world performance, students modeled environmental conditions and sunlight availability in Greenville, Frankfurt, Madrid and Mumbai. Assuming a 12-mile (20-kilometer) daily commute, the vehicle generated enough surplus energy to provide an average of 31 miles (50 kilometers) of additional range across all four locations.
Engineering for Efficiency
Reaching an energy-positive result required more than solar panels. The multi-material chassis pairs structural steel for passenger safety with aluminum components, carbon fiber structural members and 3D-printed metal joints, holding curb weight to 1,212 pounds (550 kilograms).
The exterior draws on the aerodynamic characteristics of the boxfish, whose streamlined body reduces drag while maintaining interior volume. Regenerative braking, intelligent torque distribution and optimized drivetrain controls work together to recover energy during driving.
“This was an incredibly challenging project—not only to create a working energy-positive prototype, but to demonstrate how a vehicle can become increasingly energy independent through solar integration,” said Harsh Manghnani, Deep Orange team member and solar integration lead. “Seeing our initial research and design validated in a working prototype has been incredibly rewarding.”
Design and Cabin Technology
The result is a two-door coupe drawing on BMW’s design heritage with a modern identity. The Luminetta name reflects both the vehicle’s solar capability and its retro-modern styling. Inside, a custom human-machine interface presents real-time vehicle telemetry alongside Apple CarPlay and Android Auto.
From Prototype to Research Platform
Deep Orange immerses students in the full vehicle development process — market research, customer requirements, concept development, systems engineering, component manufacturing and validation — while working alongside industry engineers under real budgets, schedules and technical constraints.
“It’s rare for a master’s student to have the opportunity to experience the complete process of developing a prototype vehicle,” said Anshul Karn, Deep Orange Project Manager. “Many engineering programs include courses in areas like digital modeling or marketing, but very few give students the opportunity to begin with a vision, work through the entire development process and ultimately deliver a fully functioning prototype. That experience is what makes Deep Orange so unique.”
The 16 students who built the vehicle graduate August 7 with Master of Science degrees in Automotive Engineering. Research on the prototype continues at the Clemson University International Center for Automotive Research in Greenville, South Carolina, where the vehicle will serve as a platform for further work in sustainable mobility.
