H55

H55 is a Swiss company that produces electric propulsion systems for the aviation industry. The company is a spin-off of the Solar Impulse project. André Borschberg, a former pilot for the project, is a co-founder. The company is headquartered in Sion, Switzerland.^[1]

H55

Founded	2017
Founder	André Borschberg, Sébastien Demont, and Gregory Blatt.
Headquarters	Sion , Switzerland
Area served	Worldwide
Key people	Aymeric Sallin, Martin Larose and Andy Sheehan.
Products	Electric Propulsion System Battery System
Website	https://h55.ch/en/

History

The company was founded in 2017 and is headquartered in Sion, Switzerland.^[1][2] It's founders are André Borschberg, Sébastien Demont, and Gregory Blatt.^[3] H55 has locations in Toulouse, France, and Montreal, Canada.^[3]

The company's main product, a battery system, was approved by the European Union Aviation Safety Agency (EASA) in early 2024.^[4][5]

In April 2021 it partnered with Harbour Air, a Richmond, British Columbia based seaplane operator.^[2][6][7] Harbour Air is converting de Havilland Canada DHC-2 Beavers to run on electricity, using H55 batteries.^[8][7][9]

In 2022 H55 agreed to supply battery systems for a Pratt & Whitney Canada (P&WC) regional hybrid-electric flight demonstrator program.^[6][10][11] The project intends to convert a De Havilland Canada Dash 8 to be hybrid-electric, aiming for a 30% improvement in fuel efficiency.^[12] Other partners include: Collins Aerospace; De Havilland Canada; the Canadian government’s National Research Council Canada (NRC); and the Quebec government’s Innovative Vehicle Institute (IVI). CAE and Piper Aircraft selected H55 to provide the battery for the electric conversion kit for the Piper Archer aircraft.^[13][14][15]

In 2023, H55 expanded into Canada as H55 Canada Inc.^[2] The company received a $10,000,000 interest-free loan from the Canadian government as part of the Aerospace Regional Recovery Initiative.^[1][16] Investissement Québec, a provincial investment company, invested in H55.^[17] The company planned to open a manufacturing facility in Greater Montréal with the investment to provide batteries and other products to the North American market.

H55 registered a company in Toulouse, France in December, 2023^[18] to partner with Czech plane maker BRM Aero on an electric two-seater aircraft.^[13] In 2025 H55 began demonstration flights of its B23 electric two-seat plane, based on the Bristell B23 ultralight.^[19]