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Power and Propulsion Element for GatewayNASA is taking on the bold objective of returning humans to the Moon by 2024. As part of this effort, the Gateway is being constructed to serve as a command center and way-point in cis-lunar space for lunar exploration missions. The Power and Propulsion Element (PPE) is the first element of Gateway to be launched and will generate all the power and propulsion required over its 15-year service life. To achieve these goals, high-power solar arrays and solar electric propulsion will be implemented and demonstrated. The electrical power system (EPS) of Gateway, prominently featuring lightweight Roll Out Solar Arrays (ROSA) with state-of-the-art Z4J solar cells and a central hinge, will be sized for an end-of-life (EOL) power management and distribution capability of over 55 kilowatts (kW). The solar array circuits are being designed in a modular manner with scalability and extensibility to a 300 kW-class mission. NASA Glenn Research Center is managing the PPE contract on which Maxar Technologies, Inc. is responsible for fabricating and demonstrating the spacecraft. This manuscript provides a summary of the electrical power system, with additional discussion of the ROSA power generation.
Document ID
Document Type
Michael Aulisio
(Glenn Research Center Cleveland, Ohio, United States)
Jeffrey Hojnicki
(Glenn Research Center Cleveland, Ohio, United States)
Clyde Christensen
Bao Hoang
Date Acquired
September 29, 2020
Subject Category
Spacecraft Propulsion And Power
Meeting Information
2020 Conference on Advanced Power Systems for Deep Space Exploration(Virtual)
Funding Number(s)
WBS: 837933.
Distribution Limits
Public Use Permitted.
Technical Review
External Peer Committee
Power Management and Distribution
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