In a significant step toward humanity’s return to deep space, Redwire Corporation has successfully completed the first deployment test of its most powerful solar arrays yet—technology designed to power NASA’s upcoming Gateway space station, the first to orbit the Moon.
The 60-kilowatt roll-out solar arrays (ROSA), developed by the Florida-based aerospace firm, will provide energy for Gateway’s solar-electric propulsion systems. Gateway is set to serve as a multi-purpose lunar platform that will support surface missions, scientific research, and future human exploration of Mars. The earliest planned launch is 2027.
“These ROSAs represent a significant technology achievement that will propel human spaceflight into a bold future,” said Adam Biskner, President of Space Systems at Redwire.
The arrays were commissioned by Maxar Technologies, the company responsible for Gateway’s Power and Propulsion Element. Redwire is building two of these ROSA wings, scheduled for delivery in the fourth quarter of 2025.
The design of the arrays emphasizes efficiency and reliability. Each ROSA delivers a power density of 40 kW per cubic meter and a power-to-mass ratio of 100 to 120 watts per kilogram. Rather than relying on motors, the arrays use composite booms that store strain energy to deploy autonomously—an innovation that simplifies deployment in space.
The unveiling of the arrays was attended by international space agencies and partners, including representatives from Maxar, Northrop Grumman, the European Space Agency, Japan’s JAXA, the UAE’s Mohammed Bin Rashid Space Centre, and the Consulate General of Canada.
“The unprecedented global coalition supporting Gateway is providing more than 60% of its funding,” said Mike Gold, President of Civil and International Space at Redwire. “This will not only save costs for U.S. taxpayers but also build vital experience for future Mars missions.”
As NASA notes, the Sun remains the most abundant energy source in space. With ROSA, Redwire is helping ensure that solar power continues to play a central role in advancing interplanetary exploration.
