• The 5M€ Clean Aviation grant supports developing an aviation-grade battery for next-generation hybrid-electric regional aircraft
• L.I.M.E project, led by Ascendance with partners EXOES, Basquevolt, and the Chair of Production Engineering of E-Mobility Components (PEM) of RWTH Aachen University, has been selected as one of 12 Visionary Clean Aviation Projects and among four fast-track initiatives driving decarbonisation technologies for short- and medium-range regional aircraft in Europe
• It strengthens BASQUEVOLT’s position as a leading European manufacturer of solid-state battery technology for next-generation electric mobility and energy storage solutions

The Governing Board of the Clean Aviation Joint Undertaking has launched €945 million, to support 12 visionary projects aimed at decarbonising aviation.

These projects aim to reduce net greenhouse gas emissions by at least 30% compared to 2020 state-of-the-art technologies, accelerating the transition to cleaner, zero-emission aircraft in the coming decade.

As part of Call 3, Clean Aviation introduced Fast-Track Areas (FTAs) – a new initiative to de-risk disruptive technologies proposed by research centres and SMEs. FTAs aim to accelerate high-impact solutions into the development phase, in close alignment with the Short-Medium Range and Regional aircraft coordinators. As part of this scheme, four promising projects have been selected — including L.I.M.E — underscoring Europe’s strong commitment to driving sustainable aviation innovation.

The grant will support the development and demonstration of an aviation-grade battery system for hybrid-electric propulsion, primarily targeting next-generation regional aircrafts with entry into service expected by 2035.

The L.I.M.E. project (Lithium-based Innovation for Modular Energy), led by Ascendance (France), a pioneer in hybrid-electric propulsion and aircraft manufacturing, brings together leading European innovators: EXOES (France), specialists in thermal integration and battery packaging; the Chair of Production Engineering of E-Mobility Components (PEM) of RWTH Aachen University (Germany), renowned for battery engineering research; and Basquevolt (Spain), a European leader in solid-state battery technology.

With €5 million in support from the EU’s Clean Aviation program, L.I.M.E. will design, prototype, and demonstrate a TRL 4 battery system tailored for hybrid-electric propulsion in ultra-efficient regional aircraft, with entry into service targeted for 2035 and potential applications in short- and medium-range aircraft.

Over 24 months, the consortium will advance from requirement definition through design, prototyping, and rigorous testing—delivering not only a validated battery demonstrator but also a European pathway to zero-emission regional aviation.

Basquevolt is advancing clean aviation with its next-generation solid-state batteries, designed to deliver greater efficiency, safety, and sustainability for electric and hybrid aircraft. By enabling longer range, lower emissions, and safer in-flight performance, Basquevolt supports Europe’s transition toward zero-emission aviation.

"This Clean Aviation grant is a milestone for Basquevolt and for Europe’s ambition to lead in sustainable aerospace. Our solid-state battery technology is designed to deliver the safety, efficiency, and performance that aviation requires to achieve zero emissions. We are proud to contribute our expertise to the L.I.M.E. consortium and to help drive Europe’s leadership in the clean aviation revolution." said Pablo Fernández Santos, Basquevolt´s Managing Director.