SpaceX bought $329M in Tesla Megapacks this year
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- SpaceX spent $295 million on Tesla Megapack battery storage in the second quarter, bringing its 2025 total to $329 million according to the company's earnings report
- xAI had purchased $430 million worth of Megapacks for its data centers before merging with SpaceX, though Q1 2025 purchases were only $34 million
- The deal flow illustrates the deepening interconnections across Musk's companies: xAI acquired social platform X in 2025, and SpaceX then acquired xAI
- SpaceX reported it had also acquired $131 million worth of Tesla Cybertrucks at manufacturer's suggested retail price as of December 2025
- Megapacks are likely being deployed at xAI data centers, where they provide sub-second backup power and smooth out GPU demand spikes that would otherwise overwhelm on-site generators or incur utility charges
Why it matters: SpaceX and xAI's combined roughly $759 million-plus in Tesla battery purchases reveal that Tesla's energy storage arm has become a key captive supplier for Musk's own AI infrastructure buildout — not just an external battery vendor — meaning Tesla Megapack deployments are now tracking the capex of Musk-controlled AI data centers rather than third-party utility projects.
