NASA Upgrades Space Station Power Capacity With Next-Generation Solar Arrays

• NASA has augmented the power generation capabilities of the International Space Station (ISS) over the last five years using next-generation International Space Station Roll Out Solar Arrays (IROSAs).
• A total of eight IROSAs have been deployed, collectively increasing the station's power capacity by more than 160kW for research and daily operations.

Technology and Design

• The IROSA design launches as a compact cylinder and unfurls autonomously after installation, similar to a yoga mat.
• The arrays are roughly half the size of legacy arrays but generate approximately 28kW of additional power each.
• The compact nature of the technology significantly reduces mass and launch volume.

Deployment History

• Technology demonstrations began in 2017, followed by the first deliveries via SpaceX commercial resupply missions in 2021.
• Between 2021 and 2023, six arrays were installed by astronauts during spacewalks, assisted by the Canadarm2 robotic arm.
• An additional set of arrays was launched during the SpaceX 35th commercial resupply mission following 2023 power projections.

Mission Impact

• The revitalized power system supports critical life support and hundreds of ongoing scientific investigations.
• The station serves as a vital testbed for future exploration technologies, including planetary defense demonstrations and deep-space missions.