Stellar Jet to Unveil Revolutionary Solid-State Hydrogen Storage for Aviation at Paris Air Show 2025

StellarJet, a pioneer in hydrogen-powered aviation, is proud to announce the unveiling of two groundbreaking innovations that bring the hydrogen aviation revolution closer to reality: a revolutionary Solid-State Hydrogen Storage Unit and a next-generation Electric Ducted Fan (EDF).

These two core technologies mark major milestones in the development of the hydrogen-powered StellarJet aircraft — an ultra-efficient, zero-emission platform designed to redefine the standards of clean flight.

The first innovation — StellarJet's solid-state hydrogen fuel tank — achieves a system-level hydrogen content of 23% wt, offering 6.6 kWh/kg energy density and a safe operating pressure from 20 to 350 bar. Capable of functioning between -60°C and +80°C, the system enables fast refueling (under 30 minutes) and provides a safe, lightweight, and modular alternative to traditional liquid hydrogen tanks.

"This storage solution represents a turning point in aviation," said Alexey Popov, CEO of Stellar Aircraft. "Until now, the limited efficiency and complexity of hydrogen storage systems held back the potential of hydrogen-powered flight. By leveraging our long-standing collaboration with experts in rocket science, our team has delivered a safe, scalable, and high-performance solution."

This breakthrough technology surpasses liquid hydrogen in all key performance metrics — it is compact, stores more usable energy per unit weight, significantly more affordable, uses low-cost, widely available materials, and is far easier to certify under aerospace safety standards. Originally developed for space applications, this innovation brings the power of rocket science into everyday aviation.

Unlike legacy liquid hydrogen systems that pose boil-off and explosion risks, StellarJet's solid-state hydrogen storage uses advanced metal hydride technology, enabling fully customizable tank shapes with superior safety. The system is optimized for a wide range of applications, including industrial, aerospace, satellite, and even submarine use.

The second innovation — an Electric Ducted Fan (EDF) propulsion unit — delivers 132 kW of power and 1700 N of thrust, while weighing only 14.7 kg. With a duct diameter of 375 mm and integrated power controller, this EDF represents the next evolution in distributed electric thrust architecture, tailored specifically for the StellarJet.

All core technologies — from design and engineering to machining and final assembly — are 100% developed and manufactured in-house by StellarJet, headquartered in Austin, Texas.

These innovations lay the foundation for the upcoming flight debut of the hydrogen-powered StellarJet Demonstrator, scheduled for Summer 2025.

StellarJet | www.stellaraircraft.com