SpaceX IPO filing reveals shift in Musk’s energy strategy

A SpaceX IPO filing released this week indicates a strategic shift for Elon Musk, suggesting that he may have given up on solar power on Earth. The document reveals that his companies—specifically artificial intelligence venture xAI—are increasingly relying on natural gas rather than the solar-focused Master Plan (Tesla’s strategic roadmap) previously championed by Tesla. Musk previously stated that Tesla’s core purpose was to accelerate the transition away from a hydrocarbon-based economy toward solar power. However, xAI has now embraced the hydrocarbon economy, using unregulated natural gas turbines to power its data centers.

Financial disclosures in the filing show that Musk’s companies are heavily investing in fossil fuel infrastructure and inter-company transactions. The key financial details include:

• More than $2.8 billion: The amount xAI plans to spend to buy more natural gas turbines.
• $697 million: The amount xAI has spent on Tesla Megapacks (Tesla’s grid-scale battery storage systems) to manage peak loads.
• $131 million: The amount SpaceX spent to purchase 1,279 Cybertrucks from Tesla.

While xAI is buying Megapacks, it has not purchased a materially significant number of solar panels from Tesla, cementing the role of fossil fuels in its immediate AI operations.

Instead of terrestrial solar, Musk is betting on space-based solar arrays to solve future energy needs. According to SpaceX, space-based solar arrays can generate more than five-times the energy of terrestrial ones due to constant sunlight. This space-centric vision comes as Musk and other Silicon Valley executives look to bypass NIMBYs (local opposition to infrastructure projects) and terrestrial power constraints. Musk has assumed that the world will need an additional terawatt worth of compute every year. This is a massive projection, considering that all the world’s data centers currently use around 40 gigawatts. In the filing, xAI and SpaceX state: “We believe that third-party estimates on data center demand are constrained by the practical supply limitations that exist in a terrestrial context and the power shortage may be far greater than what research estimates suggest.” Currently, humanity uses about 35,000 terawatt-hours of energy annually, which translates to about 4 terawatts on a continuous basis.

Why it matters

The SpaceX IPO filing reveals a strategic pivot where Musk’s companies are prioritizing immediate, high-capacity power sources like natural gas for AI compute, diverging from the solar-centric roadmap previously established by Tesla.