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Solar Car With LONGi’s BC Cells Completes 200 km Belgium Run Under Real-World Conditions Photograph: (LONGi)
LONGi has validated its back-contact (BC) solar cell technology under real-world conditions, as a solar race car powered by its cells completed a 200-km urban road test across Belgium.
The test was conducted by the Innoptus Solar Team using its 11th-generation solar car, Infinite Apollo, which was driven through live traffic and varying sunlight conditions. The exercise forms part of the team’s preparation for the 2026 American Solar Challenge, scheduled to begin in July.
The Belgium run marks a key milestone in the vehicle’s testing programme, which has included several thousand kilometres of road trials following nearly 10 months of development. The test was designed to assess performance across diverse driving conditions, including stop-and-go traffic and sustained cruising.
LONGi, which is supplying BC cell technology and vehicle-integrated photovoltaic (VIPV) solutions for the car, said the trial demonstrated stable energy output and system reliability in dynamic environments.
The road test also brought together the broader solar value chain, with partners such as Sibelco supplying high-purity quartz used in solar cell manufacturing, while system integration was carried out by the racing team.
The vehicle completed multiple stops across Belgium in a single day, navigating urban routes and fluctuating irradiance levels, while maintaining consistent performance. The test marks the car’s return to European roads after its participation in the 3,000-km Bridgestone World Solar Challenge last year.
Industry observers say such real-world validation is increasingly critical as solar technologies move beyond laboratory efficiency benchmarks to demonstrate performance in operational environments. Looking ahead, the American Solar Challenge will follow a route along the Mississippi River and Route 66, with teams required to clear a qualification round before entering the main race.
LONGi said it will continue refining its BC technology in collaboration with the Innoptus team to improve system-level performance ahead of the race. Separately, the company also showcased its solar-powered mobility applications through a “Solar Van” exhibition, aimed at demonstrating clean energy solutions to the public.
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