H55

H55 is a Swiss pioneer in certified electric propulsion technologies for aviation, founded in 2017 by the former senior leadership team of Solar Impulse. The company develops and manufactures battery packs, electric motors, motor controllers, and energy management systems specifically designed for electric and hybrid aircraft. Based in Sion, Switzerland, with subsidiaries in Montreal, Canada and Toulouse, France, H55 is at the forefront of making sustainable aviation a reality.

The company emerged from the groundbreaking Solar Impulse project, which demonstrated that solar power could enable aircraft to complete long-haul journeys without consuming any fuel. Building on this success, co-founders André Borschberg, Sébastien Demont, and Gregory Blatt established H55 to commercialize electric propulsion technologies for the broader aviation industry. The company has achieved several world-first milestones, including developing the B23 Energic, a fully electric two-seater aircraft in partnership with Czech manufacturer BRM Aero.

H55 has raised over $74 million in Series C funding as of July 2024, with investors including the Government of Quebec. The company is on track to achieve the world's first EASA certification for a battery pack for aviation by the end of 2024, with battery packs ready for integration into CS-23 aircraft starting early 2025. In 2025, H55 was recognized by Fast Company as one of the Most Innovative Companies, reinforcing its leadership at the intersection of innovation and sustainability in electric aviation.

The company completed a landmark 8-state "Across America" tour with the B23 Energic, completing 192 all-electric passenger flights across Florida, Alabama, Arizona, Nevada, California, Colorado, Wisconsin, and New York. This demonstrated the viability of electric flight for pilot training and regional aviation, with recharging costs averaging just $7 per flight and flight endurance exceeding one hour on a single charge.