SpaceX Has Spent $329 Million on Tesla Batteries This Year. Here's Why.
The rocket company is buying industrial-scale battery storage at a pace that puts hard numbers on how tightly Elon Musk's businesses are wired together, and what that means for the AI data centers at the centre of it all.
Key points
- SpaceX spent $295 million on Tesla Megapacks, large industrial battery storage units, in the second quarter of 2026 alone.
- SpaceX's total Tesla Megapack purchases reached $329 million in the first half of 2026.
- Before SpaceX acquired xAI, the AI company had already bought $430 million worth of Megapacks for its own data centers.
- As of December 2025, SpaceX had also purchased $131 million worth of Tesla Cybertrucks at the manufacturer's suggested retail price.
SpaceX bought $329 million worth of Tesla Megapacks, the large industrial battery units Tesla sells to businesses and utilities, in the first six months of 2026, according to the company's earnings report released Tuesday. That is the price of a small office tower, spent on batteries. The figure, first reported by TechCrunch AI, puts a dollar number on something most people hadn't fully registered: Elon Musk's companies are deeply, financially intertwined.
Who is paying whom, exactly?
SpaceX is buying from Tesla. Musk runs both. He also owns xAI, the artificial intelligence company behind the Grok chatbot, which SpaceX acquired earlier this year. Before that merger, xAI had already bought $430 million in Megapacks on its own. In the first quarter of 2026, that figure was just $34 million, making the Q2 acceleration hard to ignore.
The money moves in a tight circle: Tesla makes the batteries, xAI's data centers consume them, SpaceX now owns xAI, and SpaceX writes the cheques. There's also a Cybertruck line in the filing: as of December 2025, SpaceX had bought $131 million worth of Tesla's electric pickup trucks at standard retail price.
As we reported on 4 August, SpaceX's AI division tripled revenue to $2.6 billion but still lost $1.5 billion, which makes the scale of hardware spending here feel even more loaded.
Why do AI data centers need so many batteries?
AI data centers don't draw electricity at a steady rate. Training a large language model, the technology behind chatbots like ChatGPT and Grok, causes power demand to spike sharply and then fall back fast. Utilities often charge extra for those peaks, and on-site generators can struggle to respond quickly enough. A Megapack can kick in within a second, smoothing out spikes before the utility registers them, keeping bills lower and servers running without interruption.
| Purchase | Amount | Period |
|---|---|---|
| SpaceX Megapack spend (H1 2026) | $329 million | Jan to Jun 2026 |
| SpaceX Megapack spend (Q2 2026) | $295 million | Apr to Jun 2026 |
| xAI Megapack spend (pre-merger) | $430 million | Before 2026 |
| SpaceX Megapack spend (Q1 2026) | $34 million | Jan to Mar 2026 |
| SpaceX Cybertruck purchases | $131 million | As of Dec 2025 |
XAI has leaned on natural gas turbines to power its data centers, including unpermitted turbines at a site in Mississippi near its Colossus supercomputer project. We reported on 31 July that SpaceX plans to tear out those 69 illegal turbines, though nearby residents face at least two more years of waiting. Batteries remain essential even in gas-heavy setups because they handle the short, sharp demand peaks that turbines cannot match.
What does this mean for ordinary people?
Nothing immediate for your electricity bill. But if you work in energy storage, property near data centers, or anything touching Musk's network of companies, the scale here matters. The AI boom is a physical infrastructure boom. It runs on chips and power and batteries, and the companies building it are spending hundreds of millions on hardware most people have never heard of. Follow the hardware contracts, not just the chatbot headlines. That's where the real money is moving, and right now it's moving fast.
My read: The Q2 jump from $34 million to $295 million in a single quarter is the number worth watching. That's not steady procurement; that's a build-out accelerating hard, probably ahead of a capacity deadline nobody's announced yet.
