Electric Training Aircraft Manufacturer Smartflyer and Propulsion Provider H55 Join Forces on Hybrid-Electric Development

Switzerland– Smartflyer AG, an innovative Swiss aircraft manufacturer, and H55 SA, a leading provider of certified electric propulsion systems, have signed a strategic partnership during the Electrifly-in at Bern Airport. Under the agreement, H55 will supply advanced battery systems for Smartflyer’s hybrid-electric SF-1 demonstrator aircraft, which is scheduled to fly in 2026.

• H55’s battery system, the first in the world expected to receive EASA certification, will power Smartflyer’s SF-1, a hybrid-electric aircraft designed to combine the efficiency of electric propulsion with extended range capability.
• The latest generation of H55 batteries exceeds original capacity expectations, offering Smartflyer improved performance and operational flexibility.
• The collaboration will also enable integration of H55’s technology into Smartflyer’s modular battery nose module currently under development.
• The signing ceremony was attended by Smartflyer founder and CEO Rolf Stuber and H55 representatives, with both companies highlighting the partnership as a milestone in advancing sustainable aviation.
• The first flight of the SF-1 demonstrator in 2026 will represent a major industry step toward hybrid-electric aircraft adoption.

Statements

• “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.”– Rolf Stuber, CEO, Smartflyer AG
• “What impresses H55 is the strong credibility of the project, underpinned by well-thought-out and truly innovative concepts.”– Martin Larose, CEO, H55
• “The hybrid project architecture is a key highlight, as it offers performance levels comparable to combustion engines while maintaining a clear edge in sustainability.”– Axel Doffey, European Sales Manager, H55

About Smartflyer AG
Founded in 2016 in Grenchen, Switzerland, Smartflyer AG is developing a hybrid-electric aircraft for sustainable aviation. Its modular propulsion concept allows for all-electric or hybrid operation, combining efficiency, range, and reduced emissions in a scalable design.

About H55H55 SA, founded by the former Solar Impulse management team, is a Swiss company providing certified electric propulsion and battery management systems for general aviation and regional aircraft. Its solutions are designed to accelerate the industry’s transition toward safe, efficient, and sustainable air travel.

Source: H55