H55 reported continued progress on its 200 kWh Energy Storage System (ESS) for the RTX Hybrid-Electric Flight Demonstrator, building on the milestone of a first full-power system test conducted in June 2025. The demonstrator, led by Pratt & Whitney Canada and Collins Aerospace, aims to demonstrate a 30% improvement in fuel efficiency for regional aircraft. H55 CEO Rob Solomon noted that Pratt & Whitney Canada selected H55’s battery architecture as the compliance baseline, citing over 2,000 flight hours and successful EASA test campaigns. The ESS is designed for certification, featuring lightweight, modular construction and a validated cell architecture. CTO Sébastien Demont stated that this integration proves the scalability of their certifiable platform from CS23 to CS25 aircraft. With roots in the Solar Impulse project, H55 is advancing toward flight testing on a modified Dash 8-100, marking a significant expansion into the regional aircraft market. As hybrid-electric systems become central to next-generation aviation, H55’s scalable battery technology is poised to support both near-term demonstrations and long-term commercial operations.
H55 batteries drive key progress for RTX hybrid-electric flight demonstrator.
