Bern, Switzerland – September 2025 – Smartflyer AG, the innovative aircraft manufacturer, has signed a landmark partnership with H55 SA, the Swiss-based leader in certified electric propulsion systems, to power the SF-1 hybrid-electric aircraft. The agreement was formalised during the Electrifly-in opening at Bern Airport in the presence of Rolf Stuber, Smartflyer founder and CEO, and Axel Doffey, H55 European Sales Manager, representing CEO Martin Larose.
Under the deal, H55 will supply the batteries for Smartflyer’s pioneering SF-1. For Smartflyer, this represents a decisive step forward, ensuring the programme benefits from H55’s proven expertise in delivering high-quality, safety-certified battery systems specifically developed for aviation.
H55’s technology spans from individual cells to full battery modules and is set to become the first to achieve certification from the European Union Aviation Safety Agency (EASA). This “Swissness” hallmark underscores innovation, precision, and reliability, while offering Smartflyer enhanced performance and operational flexibility.
The collaboration extends to Smartflyer’s new battery nose module currently under development. Together, the two companies aim to accelerate sustainable aviation with solutions capable of matching combustion engine performance while maintaining a strong edge in environmental responsibility.
Rolf Stuber, Smartflyer CEO, said:
“With H55, we have found a partner who fully shares our vision of innovation, safety, and sustainability. H55’s advanced battery technology is not only a technical milestone for the SF-1, but also a cornerstone in redefining the future of aviation and accelerating the path toward lower-emission flying.”
H55 CEO Martin Larose added:
“What impresses H55 is the strong credibility of the project, underpinned by innovative design and efficient production concepts. The clever airframe design further strengthens Smartflyer’s advantage and makes them an ideal partner in driving the transition toward sustainable aviation.”
The first SF-1 demonstrator is scheduled to fly in 2026, marking a significant milestone in the shift toward efficient, affordable, and sustainable mobility.
About Smartflyer
Founded in 2016 in Grenchen, Switzerland, Smartflyer AG is developing a hybrid-electric aircraft for sustainable aviation. Its modular propulsion concept combines the benefits of electric flight with extended range, offering a foundation for cleaner operations and reduced emissions.
More: www.smartflyer.ch | info@smartflyer.ch
About H55
H55 was established by the former Solar Impulse team—André Borschberg, Sebastien Demont, and Gregory Blatt. The company provides certified electric propulsion and battery management systems for general aviation and regional aircraft, with the goal of enabling sustainable air travel.
More: www.h55.ch | press@h55.ch
SOURCE AND IMAGE: H55
