European Union Funded Water-to-Propellant Project
The Green SWaP initiative launched in 2024 to develop orbital rocket fuel from space-based water resources.
Updated on Oct. 10, 2026 in Space
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The European Innovation Council launched the Green Solar-to-propellant Water Propulsion (Green SWaP) project in 2024. This initiative seeks to utilize solar energy to convert water into hydrogen and hydrogen peroxide for use as rocket fuel.
Why it matters
By producing propellant directly in orbit, the project aims to drastically lower costs associated with transporting raw materials from Earth. This technology could support critical future infrastructure, including lunar logistics and long-duration deep-space exploration.
The Green SWaP project received €4 million in funding from the European Innovation Council to develop rocket thruster prototypes. The research team is currently selecting methodologies to transform space-based water into fuel using solar energy.
The players
European Innovation Council
This is an agency within the European Union tasked with identifying and scaling up breakthrough technologies and innovations.
University of Pisa
This institution is a public research university located in Italy that is participating in the development of the project.
The details
The research team is working to develop thruster prototypes that leverage solar-powered electrolysis to split water into hydrogen and hydrogen peroxide. This process eliminates the reliance on Earth-based supply chains for critical mission propellant.
Timeline
The Green SWaP project officially began in 2024.
The project is scheduled for completion in 2028.
The Big Picture
The Green SWaP project follows the funding model established by the European Innovation Council's Pathfinder program to support high-risk, high-gain aerospace technology. This initiative signifies a paradigm shift toward in-situ resource utilization, moving away from the conventional reliance on Earth-shipped propellants.
Successful development of this technology could significantly reduce the costs of future deep-space missions and lunar logistics. By enabling on-orbit refueling, it paves the way for more sustainable and frequent human activity beyond low Earth orbit.
The takeaway
This project highlights the growing trend of utilizing extraterrestrial resources to solve logistical challenges in space travel. Implementing such systems is essential for expanding human exploration reach beyond our current orbital limitations.
What happens next
The project team is scheduled to transition into a second phase of development by 2028, which will include extensive prototype testing.
Further reading
Learn more about the latest innovations in Space exploration.
Source note: This article includes information reported by Anadolu Ajansı.
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