The most experienced

electric propulsion company in the world.

The most experienced

electric propulsion company in the world.

Pioneering heritage. Industrial scale.

Born from the record-breaking Solar Impulse heritage, H55 turns pioneering flight into industrial reality. With thousands of flight hours across multiple platforms, we deliver aviation-grade battery technology for leading OEMs across civil and dual-use markets.

Over two decades of electric aviation.

Our technology has been powering electric and hybrid aircraft for over twenty years – the longest-tenured electric propulsion technology in the industry.

Solar Impulse creation
First generation battery module

entered operations with Solar Impulse 1.

Solar Impulse perpetual flight

demonstrated with a day and night flight.

Solar Impulse around the world flight
H55 founded

in Switzerland.

Bristell partnership

for the B23 Energic.

Bristell B23 Energic maiden flight

HB-SXC.

Pratt & Whitney Canada partnership

for its De Havilland Dash-8 hybrid-electric demonstrator program.

H55 expands to Canada

with H55 Canada Inc.

Compliance checklists

validated by EASA.

Next generation battery design de-risking
SmartFlyer partnership

for the SF-1 electric aircraft with range extender.

First-ever completion of formal battery module test campaign

on H55’s 6th-gen architecture.

Certifiable battery module deliveries

to Smartflyer and Pratt & Whitney Canada.

Successful system safety function verification testing

of integrated energy storage system.

Global production capabilities

H55 combines certification-ready technology with the industrial capabilities required to scale. With dual production capabilities in Europe and North America, supported by automated processes and a qualified, diversified supply chain, H55 is positioned to increase production in line with growing OEM demand while maintaining the quality, traceability and reliability required for certified aviation.

From supply chain to product

With production capabilities in Switzerland and Canada, H55 combines automated processes, rigorous traceability and qualified suppliers to deliver consistent, repeatable quality as customer programmes grow.

Precision from cell to module

Every module begins with carefully selected and characterized cells and moves through controlled assembly, testing and quality assurance – supported by a diversified and regularly audited supply chain.

Engineers, Pilots, Pioneers, Innovators, Entrepreneurs, Operators dedicated to transforming the future of aviation.

Engineers, Pilots, Pioneers, Innovators, Entrepreneurs, Operators dedicated to transforming the future of aviation.

Meet the H55 leadership team:

Meet the H55 Board of Directors: