The Final Frontier of Clean Energy: Brae Systems Bets on Space-Based Solar to Power the AI Revolution

TROY, MICHIGAN / CHICAGO, ILLINOIS – As the global race for carbon-free, 24/7 "baseload" energy intensifies, the frontier of power generation is shifting from the Earth’s surface to its orbit. In a landmark move that blends science fiction with high-stakes infrastructure investment, data center developer Brae Systems has signed a 20-year Power Purchase Agreement (PPA) with Virtus Solis to procure solar energy beamed directly from space.

The agreement, announced on September 30, 2026, marks the first commercial commitment of this scale for Space-Based Solar Power (SBSP). Under the terms, Virtus Solis is contracted to deliver 100 megawatts (MW) of continuous power—totaling 876,000 megawatt-hours annually—to a receiving station in Illinois beginning as early as 2030. For an industry currently grappling with the intermittent nature of terrestrial renewables and the slow deployment of next-generation nuclear reactors, the prospect of "sunlight that never sets" offers a tantalizing, albeit unproven, solution.

1. Main Facts: The 100-Megawatt Orbit-to-Earth Pipeline

The partnership between Virtus Solis, based in Troy, Michigan, and Chicago’s Brae Systems represents a pivotal moment for the energy-intensive Artificial Intelligence (AI) sector. While terrestrial solar farms are limited by the diurnal cycle and weather patterns, a satellite in a strategic orbit can capture sunlight nearly 24 hours a day, 365 days a year.

The Scale of the Agreement

Brae Systems, which specializes in innovative cooling and infrastructure for AI clusters, has secured 100 MW of constant power with an option to scale the capacity to 250 MW. Unlike traditional solar PPAs that account for "curtailment" or nighttime downtime, this contract specifies "full capacity" for every one of the 8,760 hours in a year.

The Infrastructure

The power will be received by a "rectenna"—a specialized rectifying antenna array—to be constructed in Illinois. On the supply side, Virtus Solis must deploy a massive orbital structure, potentially up to two kilometers in diameter, composed of modular solar-to-microwave tiles.

The AI Catalyst

The International Energy Agency (IEA) reports that data center energy consumption could exceed 945 terawatt-hours by 2030. With traditional grids struggling to accommodate the surge in demand, AI developers are increasingly seeking "off-grid" or unconventional energy sources to ensure their multi-billion dollar GPU clusters remain operational around the clock.

2. Chronology: From 1970s Theory to 2026 Contracts

The concept of harvesting solar energy in space and beaming it to Earth is not new, but the convergence of falling launch costs and advancements in wireless power transmission has recently accelerated its feasibility.

• 1970s: NASA and the U.S. Department of Energy conduct the first serious feasibility studies on SBSP following the oil crisis. The projects are deemed technically possible but economically ruinous due to the high cost of space flight.
• 2009: California utility PG&E signs a contract with startup Solaren for 200 MW of space power. The project is eventually abandoned in 2015 after Solaren fails to secure the billions in funding required for launch.
• January 2023: The California Institute of Technology (Caltech) launches the Space Solar Power Demonstrator.
• May 2023: Caltech’s MAPLE experiment successfully beams detectable energy from orbit to a receiver in Pasadena, proving the fundamental physics of wireless power transfer in a vacuum.
• January 2024: NASA’s Office of Technology, Policy, and Strategy (OTPS) releases a comprehensive report analyzing the economic hurdles of SBSP, setting the stage for private sector cost-reduction targets.
• January 2025: The U.S. research agency ARPA-E grants Virtus Solis $2 million to refine its power-beaming efficiency.
• September 30, 2026: Brae Systems and Virtus Solis sign the 20-year PPA, moving the technology from the laboratory to the commercial balance sheet.
• March 2027 (Anticipated): Virtus Solis plans a public demonstration to prove a transmission efficiency of over 50%.
• 2030 (Target): Scheduled commencement of commercial power delivery to the Illinois rectenna.

3. Supporting Data: The Physics and Economics of Beaming Power

To understand why a data center would look to the stars for electricity, one must look at the efficiency and availability metrics that differentiate space solar from its terrestrial counterpart.

The Orbital Advantage

According to research conducted by Google’s Suncatcher team, a solar module in the correct orbit receives up to eight times more energy than a module on Earth. In space, there is no atmospheric filtration, no cloud cover, and, depending on the orbit, no "night."

Efficiency Hurdles

The "end-to-end" efficiency of SBSP remains the primary technical challenge. Current demonstrations have only managed to convert and transmit about 4% of the captured solar energy into usable grid power. Virtus Solis claims its proprietary technology will push this past 50% by 2027. The process involves three loss-heavy stages:

1. Conversion: Sunlight to Direct Current (DC), then DC to Microwaves.
2. Transmission: Beaming the microwaves through the Earth’s atmosphere.
3. Rectification: Converting microwaves back to DC/AC at the ground station.

The Cost Gap

The economic disparity remains staggering. A 2024 NASA analysis estimated the Levelized Cost of Energy (LCOE) for SBSP at between $0.61 and $1.59 per kilowatt-hour (kWh). For context, terrestrial solar farms in Germany currently produce power at $0.04 to $0.07 per kWh. Even when paired with battery storage, terrestrial solar costs rarely exceed $0.22 per kWh.

For SBSP to become competitive (aiming for $0.03 to $0.08 per kWh), NASA outlines several prerequisites:

• Launch costs must drop to approximately $50 million per flight.
• Solar cell efficiency must reach 50%.
• Hardware must have a minimum lifespan of 15 years in the harsh radiation environment of space.

4. Official Responses and Strategic Orbits

The viability of the Brae-Virtus Solis deal hinges on a radical departure from traditional satellite positioning. While most SBSP concepts focus on Geostationary Orbit (GEO)—36,000 km above the Earth—Virtus Solis is betting on Molniya orbits.

The Virtus Solis Strategy

CEO John Bucknell explains that by using highly elliptical Molniya orbits with 12-hour periods, a constellation of three stations can provide continuous coverage to northern latitudes. This approach reduces the complexity of maintaining a fixed position over a single point while maximizing the time the satellites spend over the target receiving station in Illinois.

"We are providing a plan for predictable energy costs over a 20-year horizon," says Vishnu Indukuri, CEO of Brae Systems. For Brae, the contract isn’t just about the current price of power, but about "locking in" a dedicated, carbon-free supply that isn’t subject to the volatility of terrestrial grid congestion.

The NASA and ESA Perspective

While NASA remains cautious, emphasizing the "significant maturation" required for the technology, the European Space Agency (ESA) has been more proactive through its SOLARIS initiative. ESA is currently funding studies with industrial giants like Thales Alenia Space and Enel to determine if SBSP could be a cornerstone of Europe’s 2050 Net Zero goals.

5. Implications: A Binary Choice for the AI Industry

The Brae Systems contract highlights a growing schism in how the tech industry plans to power the future of computation. There are currently two competing philosophies: Beaming the Power Down vs. Moving the Data Up.

Implications for Terrestrial Grids

If Virtus Solis succeeds, it could alleviate the "gridlock" currently stalling data center construction. The IEA notes that 20% of planned data center projects are delayed due to a lack of grid connections. SBSP allows developers to bypass the traditional grid by building rectennas directly adjacent to their facilities, effectively creating a "celestial microgrid."

The "Data Center in Orbit" Alternative

Contrasting the Virtus Solis approach, companies like SpaceX and Google are exploring the possibility of launching the data centers themselves into orbit.

• Google’s Project Suncatcher: Aims to orbit swarms of AI chips that process data in space, using sunlight directly and avoiding the 50% transmission loss of beaming power to Earth.
• The Cooling Paradox: While Brae Systems plans to submerge its terrestrial data centers in old coal plant cooling ponds to manage heat, space-based data centers face the opposite problem. In a vacuum, heat can only be dissipated through radiation, requiring massive, heavy radiators that could make orbital computing three times more expensive than land-based alternatives.

Environmental and Security Concerns

The deployment of kilometer-scale structures in orbit raises significant questions regarding:

1. Space Debris: A collision with a two-kilometer solar array would create a catastrophic debris field.
2. Light Pollution: Astronomers have already warned that reflective mirrors or large solar arrays could interfere with terrestrial telescopes and disrupt nocturnal ecosystems.
3. Signal Interference: The precision required to beam high-power microwaves to a specific rectenna without interfering with communication satellites or aviation electronics is unprecedented.

Conclusion: A High-Stakes Gamble on the "Starship" Economy

The success of the 20-year PPA between Brae Systems and Virtus Solis ultimately rests on a single variable: the cost of access to space. John Bucknell of Virtus Solis admits that his first commercial plant would require roughly 18 launches of SpaceX’s Starship system. If Starship achieves its goal of rapid reusability and dramatically lower costs per kilogram, the economics of space solar could shift overnight.

For now, the deal remains as much a symbolic gesture as a financial one—a signal to the markets that the AI industry is willing to fund the "impossible" to ensure its survival. Whether Illinois will truly be powered by the sun at midnight in 2030 remains to be seen, but the contract signed in September 2026 has officially moved the conversation from the realm of "if" to the timeline of "when."