This post is also available in:
עברית (Hebrew)
Aetherflux, a U.S.-based startup founded by physicist Baiju Bhatt, is setting its sights on revolutionizing space-based solar power (SBSP) by developing a scalable and affordable alternative to traditional methods. While SBSP has long remained in the early development phase, Aetherflux believes its novel approach could finally unlock its potential.
The company plans to deploy a constellation of smaller satellites that will beam solar power back to Earth using infrared lasers. This marks a significant departure from the conventional reliance on large satellite arrays positioned in geostationary orbit, which are designed to remain in constant sunlight and typically employ microwave transmitters to deliver energy to ground-based rectennas.
Bhatt noted in an interview with SpaceNews that traditional SBSP designs lack scalability. “Our main observation is the reason it hasn’t happened is because that design is not one that you can iterate on. It’s all or nothing,” he explained. By contrast, Aetherflux’s method allows for incremental improvements, as the company can launch additional satellites into low Earth orbit (LEO) as needed.
The first in-space test of Aetherflux’s technology is set for 2026, utilizing a “kilowatt-class” spacecraft bus provided by Apex. This spacecraft will be launched aboard a SpaceX Transporter mission, beaming power back to Earth with an infrared laser that has a spot size of 10 meters. Future designs aim to enhance this capacity further. Importantly, Aetherflux’s satellites will incorporate power storage solutions to ensure functionality during nighttime.
To advance this groundbreaking project, Aetherflux is seeking approximately $10 million in funding for the initial demonstration phase. This is significantly lower than the substantial infrastructure costs associated with SBSP.
If Aetherflux’s inaugural test proves successful, its modular approach could attract renewed investor interest, paving the way for a future where renewable energy is beamed from space, potentially transforming the energy sector.
