H55’s certification-grade ESS platform reduces aircraft integration and certification risk, helping OEMs move more efficiently towards aircraft certification, thereby enabling electric aviation at scale.
Certification is not a test. It is an engineering discipline.
In December 2025, H55 completed – for the first time in the aviation industry –all regulator-required and EASA-witnessed propulsion battery module certification tests, conducted on serial-conforming hardware from our own production-compliant manufacturing lines.
Designed for certification, accelerating market entry for OEMs
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H55 qualifies its systems through representative environmental testing, covering temperature extremes, altitude, vibration and electromagnetic interference. This ensures safe performance in all operating conditions.
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Safety-critical airborne software is developed and verified by applying controlled, traceable processes to guarantee predictable and safe behaviour in flight.
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Airborne Electronic Hardware (AEH) is traced from its requirements through design and testing to ensure its reliable operation.
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To demonstrate that batteries can perform safely in flight, H55 tests them under normal operation and worst-case failure conditions, including thermal runaway.
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Aircraft-level requirements, interfaces and safety objectives are managed and verified throughout system development. H55 applies this process to ensure optimal integration with the aircraft.