H3 Dynamics and XSun have announced a groundbreaking collaboration to develop the world's first solar-hydrogen-electric uncrewed aircraft system. This innovative system will utilize a unique tribrid propulsion system that integrates solar, hydrogen, and battery power to enhance efficiency and flight capabilities. The aircraft, based on XSun's SolarXone platform, will be equipped with a 1-kW fuel cell from H3 Dynamics for cruise power, while solar photovoltaic cells integrated into the wings will generate up to 400 watts of power. Batteries will be employed for takeoff, ensuring a seamless transition between power sources. The synergy of these technologies is expected to provide an electric flight endurance of up to 12 hours and a range of 600 km, marking a significant milestone in the development of sustainable aviation solutions. H3 Dynamics CEO, Taras Wankewycz, expressed enthusiasm about the potential of harnessing solar power in aircraft to enhance fuel efficiencies in hybrid-electric fuel cell systems. He emphasized the benefits of this approach in increasing flight durations while optimizing space and weight considerations. Test flights for the SolarXone with the tribrid propulsion system are scheduled to commence in October in France, showcasing the practical application of this cutting-edge technology. Moreover, H3 Dynamics is ramping up its production capabilities in Toulouse, France, with a focus on delivering certified hydrogen-electric power systems by the end of 2025. Wankewycz highlighted the ongoing setup of the production facility, with operations expected to be fully functional within three to four months. The company's strategic partnerships with industry leaders like Airbus, Pipistrel, and others underscore the growing interest in hydrogen-electric propulsion solutions across a range of aircraft types, from uncrewed systems to regional jets. The expanded Aerocell product line offers a variety of power systems to cater to different aircraft requirements, further demonstrating the versatility and potential of renewable energy in aviation.