H55, a Valais-based pioneer in electric aviation technologies, has announced the successful closing of its Series C financing round, raising CHF 65 million.

Founded in 2017, H55 emerged from the Solar Impulse project and is headquartered at the Energypolis campus in Sion. The company has positioned itself at the forefront of the electric aviation industry, driven by its commitment to safety, performance, and sustainability.

The newly raised funds will enable H55 to complete the necessary testing for European Union Aviation Safety Agency (EASA) certification of its propulsion battery packs by the end of the year. This milestone will make H55 the first company to meet the certification requirements for CS-23 category aircraft. “Being just months away from meeting all battery certification requirements positions us to be market leaders, a significant achievement for H55,” said André Borschberg, Co-Founder and Executive Chairman of H55.

In March 2024, EASA approved H55’s Energy Storage System (ESS) compliance checklist, confirming that it meets current operational and environmental standards. Subsequent rigorous testing validated the safety and performance of H55’s battery packs, further establishing the company as a leader in electric aviation innovation.

The financing round will also support H55’s expansion in North America, specifically through the construction of a new manufacturing facility in Montreal. This new facility will enhance product development and technical customization for key customers including Pratt & Whitney Canada, CAE and Harbour Air.

The CHF 65 million Series C round builds on the company’s momentum from previous financing successes. In September 2023, H55 raised CHF 45 million to accelerate its efforts to commercialize electric and hybrid propulsion solutions. H55’s commitment to advancing electric aviation is further evidenced by the recent EASA approval of its electric battery system and ongoing collaborations with industry leaders.