SpaceX spent $329 million on Tesla Megapack battery systems in 2026 alone to support AI datacenter operations.
A $329 million purchase order takes on new dimensions when buyer and seller share a CEO. SpaceX's Q2 2026 earnings, filed with the SEC in early August, reveal that the rocket company spent $295 million on Tesla Megapacks in a single quarter. Year-to-date: $329 million. This figure sits atop roughly $1 billion in Megapack purchases by xAI—now merged into SpaceX—dating back to 2024, according to SpaceX's amended S-1/A IPO filing. The scale reflects a broader trend driven by projects like the Stargate Project, which has accelerated AI infrastructure spending across the industry.
**Megapacks aren't powering rockets—they're keeping GPU clusters operational.**
These batteries aren't destined for launch pads. They're bound for AI data centers, where racks of Nvidia GPUs spike power demand like a stadium at kickoff—sudden, intense, and unforgiving. Megapacks handle peak-shaving, absorbing sharp power surges to avoid crushing demand charges. They deliver sub-second backup response and smooth the gap between constant-output gas turbines and wildly variable compute loads. At xAI's Colossus facility in Mississippi—where reports indicate dozens of unpermitted natural gas turbines operate, according to TechCrunch—battery backup isn't optional. It's essential infrastructure.
**Related-party transactions are a filing requirement. In this case, they're the entire story.**
Both Tesla's 10-Q and SpaceX's S-1/A explicitly flag these deals as "related-party transactions." One reading: strategic vertical integration, securing supply before competitors recognize the opportunity. The skeptical reading: manufactured demand that inflates Tesla Energy's revenue while raising questions about transfer pricing and capital allocation. Both readings are valid.
The scale is striking. SpaceX's total Q2 capex reached $18.4 billion, with $15.8 billion directed to AI compute infrastructure, per the Q2 earnings call. Megapacks represent a fraction of that spend—yet the trajectory is more significant for it. If this pace continues, Tesla Energy could field multi-billion-dollar annual orders from Musk-linked AI infrastructure alone. Competitors are watching. The Megapack has become AI infrastructure's default power-management system.
For investors in Tesla or SpaceX, the math looks favorable. But when your largest energy storage customer shares your CEO's name, "related-party transaction" isn't buried footnote material. It's the sentence worth reading twice.