H55 is a Swiss company specialising in certification-grade electric propulsion and energy storage systems for aviation. The company enables electric aviation to scale by transforming commercial cells into safe Energy Storage supported by regulators, insurers and OEMs. Founded as the technological legacy of Solar Impulse, H55 builds on more than two decades of hands-on electric aviation experience. The company has already designed, built, and flown multiple electric aircraft.

H55 supports a platform-based approach, allowing certification evidence to compound across aircraft programmes, reducing adoption risk, and supporting capital-efficient deployment of electric and hybrid aircraft.