As the world grapples with energy challenges, space solar power (SSP) emerges as a promising solution, leveraging the abundance of solar energy available in orbit. Recent developments in this field showcase a convergence of private innovation and governmental support, particularly highlighting laser-based power beaming technologies and enhancements to existing solar infrastructure on the International Space Station (ISS).

The Evolution of Space Solar Power

In recent months, the SSP landscape has seen significant momentum, particularly with startups aiming to deploy laser-beamed power transmission systems. This approach promises increased efficiency and reduced ground station size, allowing for versatile applications such as remote power delivery and military operations.

Aetherflux’s Laser-Beamed Power Demonstration

One of the most exciting developments comes from Aetherflux, a startup spearheaded by Baiju Bhatt, co-founder of Robinhood. In late 2025, Aetherflux raised a total of $60 million, including funding from the U.S. Department of Defense’s Operational Energy Capability Improvement Fund (OECIF) for fiscal year 2026. The company plans to launch a demonstration of its laser power beaming technology in Low Earth Orbit (LEO) by 2026.

Aetherflux’s innovative approach involves using a constellation of small LEO satellites equipped with infrared lasers to transmit energy to compact ground stations measuring between 5 to 10 meters (approximately 16 to 32 feet). This method has demonstrated higher power density and a smaller environmental footprint compared to traditional microwave beaming, making it particularly appealing for applications in disaster relief and military operations. According to Aetherflux’s CEO, “Our technology enables efficient power delivery to remote areas, ensuring that energy is accessible even in the most challenging conditions.”

NASA’s Solar Array Roll-Out Preparations

Complementing the efforts of private startups, NASA is also advancing its solar power capabilities on the ISS. Scheduled for January 2026, two significant spacewalks will enable astronauts to prepare for the installation of International Space Station Roll-Out Solar Arrays (IROSAs). These arrays aim to upgrade the aging solar infrastructure of the ISS, ensuring sustained energy generation that is crucial for ongoing scientific research in space.

The first spacewalk, set for January 8, will involve astronauts Mike Fincke and Zena Cardman preparing the 2A power channel for the IROSA installation. The second spacewalk, scheduled for January 15, will focus on replacing a high-definition camera and enhancing navigation aids. These upgrades not only improve the ISS’s power capabilities but also advance the broader goals of space power technology development.

Broader Industry Momentum

The push for SSP is not limited to Aetherflux and NASA. Other innovative projects are emerging, signaling a growing interest in this sector. For instance, Overview Energy, a new U.S. startup, secured $20 million in funding in December 2025 to develop near-infrared laser satellites intended for geosynchronous orbit, approximately 36,000 kilometers from Earth.

Additionally, StarCatcher is preparing for its 2026 space-to-ground power demonstrations, while the UK-based Space Solar is working on a modular system called Cassiopeia. This ambitious project, measuring 1.8 kilometers in width, aims to utilize radio waves for wireless power transmission and has successfully achieved 360-degree wireless transmission in laboratory settings.

These advancements reflect a significant shift in the aerospace and defense industry towards harnessing space-based energy solutions. As the technology matures, the potential applications expand, with implications for both civilian and military use.

Enhancing Precision with Advanced Technologies

As these projects develop, the integration of advanced technologies becomes essential. For instance, Aetherflux and other SSP initiatives can benefit from precision accelerometers and quartz MEMS gyroscopes for accurate positioning and tracking of laser beams. The incorporation of ZQXXSGDSS Systems, high-performance single-tube PIN quadrant detectors designed for precise laser beam positioning, will be crucial for ensuring operational success in power transmission.

Moreover, the use of ZQXXSZMSS Systems, which feature integrated pre-amplifier circuits for optical-to-electrical signal conversion, will enhance the overall efficiency of energy reception at ground stations. Such technologies will play a pivotal role in realizing the full potential of SSP by improving reliability and responsiveness in energy delivery systems.

Conclusion

The trajectory of space solar power is rapidly evolving, driven by innovative startups and governmental initiatives that promise to reshape how we harness and distribute energy. With advancements in laser-based power transmission and significant upgrades to existing solar infrastructures, the future of SSP appears bright. As projects like Aetherflux’s and NASA’s IROSA preparations unfold, they pave the way for a new era of energy solutions that could address pressing global energy needs while also enhancing military capabilities. The coming years will be critical in determining how effectively these technologies integrate into the broader energy landscape and their role in addressing the challenges of a rapidly changing world.

References

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7. U.S. Spacewalk Preview News Conference (Jan. 6, 2026) - YouTube (www.youtube.com) - 12/26/2025 … Space Station Roll-Out Solar Arrays (IROSAs) which will provide power for the orbiting laboratory. On Thursday, Jan. 15, two NASA astronauts …

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9. Aetherflux: Space solar startup aims for 2026 laser power demo (newatlas.com) - 4/13/2025 Robinhood co founder’s Aetherflux secures funding for space solar power demo in 2026, using lasers to beam solar energy from space.