Fuel cells generate electricity, heat and potable water through controlled reactions between oxygen and hydrogen, making them a core technology for long duration crewed spaceflight. Nimbus has developed a proprietary water management approach that removes product water using a blend of capillary and hydraulic forces that do not depend on gravity, allowing the system to function reliably in microgravity and partial gravity conditions.

According to Nimbus, this gravity independent water management reduces system complexity compared with conventional fuel cells designed for terrestrial use. The design can cut overall system mass and volume, which are critical drivers for mission architecture and cost, while also simplifying operations for in space and lunar surface applications.

The recent test series exposed the Nimbus fuel cell stack and associated components to mechanical loads representative of launch on a crewed lunar mission profile. Engineers evaluated the unit for leaks, structural response, electrical output and water management performance under varying vibration spectra and shock events, confirming that the technology can withstand the dynamic environment without degradation in its key operating metrics.

"These test results reflect the successful collaboration between Blue Origin and Nimbus Power Systems on advanced Polymer Electrolyte Membrane (PEM) fuel cell technology specifically tailored to space applications," said John Couluris, Senior Vice President of Lunar Permanence at Blue Origin. "We continue to leverage the latest advances in Nimbus' terrestrial fuel cell technology to accelerate Blue Origin's in house fuel cell solutions for in space and lunar products."

"This demanding hardware demonstration is the culmination of more than a year of close cooperation between the talented teams at Nimbus and Blue Origin," added Michael Gorman, CEO of Nimbus Power Systems. "It speaks to the reliability of the underlying technology and our combined attention to product detail. We look forward to supporting Blue Origin's commercial space objectives by continuing to harmonize space and terrestrial fuel cell supply chains to lower costs and increase reliability for both applications."

Blue Origin holds a license to use Nimbus Power Systems fuel cell technology in its Blue Moon lunar lander program and in other space power system developments. The company plans to integrate fuel cell based power and water generation into Blue Moon to support surface operations, cargo delivery and crewed activities as part of NASA's Artemis campaign.

NASA intends to employ the Blue Moon lander to ferry astronauts between lunar orbit and the Moon's surface and to enable extended expeditions on the Moon. Fuel cells that can deliver continuous electrical power, thermal management and drinkable water in this environment are expected to play a central role in mission architectures focused on lunar permanence and eventual commercial activity.

Nimbus Power Systems, based in Groton, Connecticut, is advancing fuel cell systems for heavy duty mobility, aerospace and stationary power markets and is positioning its technology as a high efficiency replacement for conventional heavy duty engines. Through licensing and support agreements, Nimbus aims to serve both terrestrial and space customers, using common technology building blocks to improve manufacturability and supply chain resilience.

Blue Origin is developing reusable rocket engines, launch vehicles, in space systems and lunar landers as part of its broader effort to lower the cost of access to space and to open space resources to a wide range of users. The collaboration with Nimbus on fuel cell technology aligns with Blue Origin's strategy to pair in house developments with specialized partners to field integrated solutions for lunar missions and other deep space applications.

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