ZeroAvia will explore converting Cessna Caravan Seaplanes using its hydrogen-electric propulsion technology, already flight tested in a six seat airframe and with a 19 seat testbed flight imminent.

ZeroAvia's ZA600 zero-emission engines are to be fitted into Otto's Celera aircraft. The efficiency gains from new airframe design, rather than retrofitting, can expand the impact of zero-emission aviation.

ZeroAvia and Monte have struck a deal for 100 hydrogen-electric powertrains to enable zero-emission aircraft leasing. The companies aim to retrofit the aircraft for regional operators starting 2024.