NASA Astronauts Complete 6.5-Hour Spacewalk to Upgrade ISS Power Grid

NASA astronauts Jessica Meir and Anil Menon conducted a 6.5-hour spacewalk on Thursday, August 6, 2026, to advance a critical power system upgrade on the International Space Station (ISS). The mission focused on preparing the station's infrastructure for enhanced energy generation as the orbital laboratory continues to support an expanding array of scientific research.

During the excursion, which NASA reports lasted exactly 6 hours and 27 minutes, the duo worked on the station's port truss. Their primary objective was the installation of mounting hardware and bracket structures specifically designed to prepare the 3B power channel for upcoming solar array modifications. According to NASA, these structural additions are essential prerequisites for the integration of new power-generating hardware.

The Push for Power

This operation is part of a broader, multi-year effort to modernize the ISS power architecture. The station is currently transitioning from its aging legacy solar wings to International Space Station Roll-Out Solar Arrays (iROSA). These advanced arrays are designed to augment the existing system, increasing both power generation and overall efficiency. This upgrade is necessary to meet the growing energy demands of modern scientific payloads and the requirements of the crew as the station moves toward its eventual decommissioning phase.

Strategic Implications

Maintaining the integrity of the ISS power grid is vital for the continued operation of life-support systems and the high-energy instruments used in international research. Beyond the immediate needs of the station, the deployment of iROSA technology serves as a critical testbed for future space exploration. The success of these deployable solar arrays provides a technical blueprint for the power systems that will eventually support deep-space habitats and lunar outposts, where efficient, scalable energy is a primary constraint.

Next Steps

With the mounting hardware now in place on the port truss, NASA has cleared a major hurdle for the next phase of the power channel modifications. While the structural preparation is complete, the agency will now focus on the subsequent installation and activation of the solar array components. Mission controllers will continue to monitor the stability of the 3B power channel to ensure the station remains viable for its diverse international research partners.