TL;DR
- Gas-Turbine Spend: SpaceX’s IPO filing discloses that xAI plans an additional $2.8 billion on natural gas turbines to power its AI buildout.
- Legal Risk: xAI’s Colossus 2 site in Mississippi now runs 27 unpermitted turbines and faces a pending NAACP-led Clean Air Act lawsuit.
- Orbital Pitch: SpaceX argues space-based solar arrays could generate over five-times the energy of terrestrial panels, but orbital power costs multiples more per unit.
- Tesla Mission Gap: xAI bought $697 million in Megapacks and $131 million in Cybertrucks over two years, but no meaningful Tesla solar panel purchases.
In its IPO prospectus filed this week, SpaceX disclosed that xAI plans to spend an additional $2.8 billion on natural gas turbines to power its AI buildout. Alongside that disclosure, the same filing pitches an orbital alternative as the long-term answer to AI power demand, framing terrestrial energy as a binding constraint: “the power shortage may be far greater than what research estimates suggest”.
SpaceX has signalled orbital solar arrays as the long-term answer to AI compute demand, even as xAI’s near-term plan doubles down on fossil-fueled compute. That combination would sideline Tesla’s earthbound solar business at the moment Elon Musk, founder of Tesla, xAI, and SpaceX, is steering record amounts of power into AI. Filed this week, the disclosure lands while xAI is already in court over unpermitted turbines in Mississippi.
xAI’s Gas-Turbine Reality
xAI currently runs its data centers on dozens of gas turbines, and the new commitment extends that footprint rather than starting from scratch. Between late March and early May, xAI added 19 portable turbines at its Colossus 2 site in Southaven, Mississippi, taking the campus count to 27 unpermitted natural gas turbines. Potential emissions from that installation alone reach more than 1,700 tons of smog-forming nitrogen oxides per year.
SpaceX’s filing concedes a heavy reliance on natural gas and gas-turbine technology, and flags that injunctions or rescinded permits would adversely affect the AI business.
Regulators have already moved. Federal officials ruled earlier this year that xAI was operating its mobile turbines in violation of federal air-pollution law, and a Clean Air Act lawsuit led by the NAACP is still pending. Abre’ Conner, the NAACP attorney leading that case, frames the post-ruling expansion as a public-health issue rather than a permitting dispute:
“A data center should not be a potential death sentence for a community’s health. By looking to evade clean air laws to operate dirty turbines that emit pollution and known carcinogens, these companies are following a shameful, familiar pattern: asking Black and frontline communities to bear the toxic brunt of innovation.”
Abre’ Conner, NAACP attorney leading the Clean Air Act lawsuit
The Tesla Mission Versus the xAI Spend
Tesla’s stated mission is to accelerate the world’s transition to sustainable energy, and Tesla’s Master Plan Part 3, which outlined a plan to eliminate fossil fuels, was released roughly three years ago across the company’s product line. Musk made the broader case in stronger language two decades earlier, when Tesla was still a tiny electric-car startup with no battery business of its own.
“the overarching purpose of Tesla motors…is to help expedite the move from a mine-and-burn hydrocarbon economy towards a solar electric economy.”
Elon Musk, founder of Tesla, xAI, and SpaceX
Current spending tells a different story. xAI has spent $697 million on Tesla Megapacks over the last two years to smooth peak load on its data-center grid. SpaceX’s filing separately discloses $131 million spent on 1,279 Tesla Cybertrucks over the same period. On solar panels, the technology Tesla still markets as central to its mission, xAI has not bought meaningfully from Tesla.
Peer Trend and Orbital Economics
xAI is not alone in choosing combustion. Microsoft, Chevron, and Engine No. 1 announced a West Texas plant in early April; Google’s 933 megawatt gas project with Crusoe in North Texas dates to the same month; Meta added seven gas plants at its Hyperion site in Louisiana. AI training requires electricity delivered 24/7, and battery-backed solar still costs more upfront than a gas turbine to clear that operational floor.
SpaceX argues that terrestrial power is the binding ceiling, saying space-based solar arrays can generate more than five-times the energy of comparable panels on Earth thanks to uninterrupted sunlight. The company is exploring solutions that would require launching data center components on Starship rockets to access solar power in orbit.
Economics are less reassuring. Power for Starlink satellites costs multiples more per unit than power at a terrestrial data center, leaving a wide gap between physically possible and financially defensible. Andrew McCalip, an engineer assessing orbital-data-center economics, framed the question bluntly: “it’s only a question of whether this is a rational thing to scale up economically”.
A pending 2026 NAACP-led Clean Air Act suit over xAI’s 27 unpermitted Southaven turbines is the near-term gate, and a federal ruling against the company would strip Colossus 2 of its trailer-mounted generators. Without those units, xAI would have to source the site’s power within weeks of any injunction, well before the first orbital array could reach the launch pad.
