H55 delivers first certified Adagio battery modules to Smartflyer’s SFX1 aircraft program

H55 has supplied the initial certified Adagio battery modules to Smartflyer for integration into the SFX1 hybrid-electric aircraft, marking a significant progression in the programme. This delivery transitions the SFX1 from component validation to full system integration and testing, with the battery modules having already passed all regulatory certification requirements. The integration phase will focus on combining propulsion architecture, energy management, and other aircraft systems ahead of a planned ground test campaign this summer, with the first flight anticipated in autumn 2026. The SFX1 is designed as a hybrid-electric aircraft aimed at pilot training, utilising electric propulsion supplemented by a range extender to enhance operational flexibility. H55, which originated from the Solar Impulse project, brings extensive experience to the table, having logged over 2,000 hours of fully electric flight without any battery-related incidents. This track record underpins the company’s commitment to a certification-grade approach to electric propulsion, setting it apart from systems that merely meet compliance standards. Smartflyer’s CEO, Rolf Stuber, highlighted the significance of receiving the Adagio battery modules, describing it as a major milestone that enables the next stage of development. He emphasised the collaborative effort between Smartflyer and H55 to advance efficient and sustainable aviation solutions. This partnership reflects a growing momentum within the electric aviation sector to deliver practical, environmentally friendly aircraft for training and other applications. Looking ahead, the successful integration and testing of these battery modules will be critical in demonstrating the viability of hybrid-electric propulsion in aviation. The SFX1 programme’s progress could pave the way for broader adoption of sustainable technologies in pilot training aircraft, potentially influencing regulatory frameworks and industry standards. With first flight targeted for 2026, the coming months will be pivotal in validating the system’s performance and safety credentials.