SpaceX sharply increased purchases of Tesla Megapack battery storage systems in the second quarter, underscoring the growing integration of Elon Musk’s businesses as surging artificial intelligence infrastructure drives demand for large-scale energy storage.
According to SpaceX’s earnings report released on Tuesday, the company spent $295 million on Tesla Megapacks during the second quarter, bringing total purchases for the first half of the year to $329 million.
The investment highlights how Musk’s network of companies is increasingly functioning as an interconnected ecosystem, with Tesla supplying critical energy infrastructure to support the rapid expansion of AI computing capacity across his businesses.
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The Megapack purchases are widely expected to support AI data centers operated by SpaceX following its acquisition of xAI earlier this year.
Before merging with SpaceX, xAI had already invested heavily in Tesla’s battery technology, purchasing $430 million worth of Megapacks to power its AI facilities. By comparison, the company bought only $34 million worth of the battery systems in the first quarter, indicating that procurement accelerated significantly after becoming part of SpaceX.
The spending reflects the enormous energy requirements of modern AI infrastructure, where uninterrupted electricity supply has become as strategically important as access to advanced semiconductor chips.
The latest transactions further illustrate the deep commercial ties among Musk’s businesses. Musk serves as Chief Executive Officer and largest shareholder of SpaceX while also leading Tesla. His AI startup xAI acquired social media platform X in 2025 before being absorbed into SpaceX earlier this year, consolidating several of his technology ventures under one corporate umbrella.
The regulatory filing also revealed that SpaceX had acquired $131 million worth of Tesla Cybertrucks at manufacturers’ suggested retail prices as of December 2025, demonstrating that Tesla has become a significant supplier of vehicles and energy equipment across Musk’s broader business empire.
The internal transactions also provide Tesla with a growing source of commercial demand beyond its traditional automotive business, particularly as its energy generation and storage division becomes an important contributor to revenue.
Why Batteries Matter For AI Data Centers
Although xAI has relied extensively on natural gas-fired generation to power its computing infrastructure, battery storage remains a critical component of modern AI facilities.
Large-scale systems such as Tesla’s Megapack serve several essential functions beyond emergency backup power.
They can instantly provide electricity during outages, protecting thousands of graphics processing units (GPUs) from interruptions that could halt AI training workloads or damage sensitive computing equipment.
More importantly, batteries help manage the highly variable electricity consumption characteristic of AI data centers.
Unlike traditional industrial facilities, AI clusters experience rapid fluctuations in power demand as computing workloads intensify during model training or inference before subsiding. These sudden spikes can trigger expensive peak-demand charges from utilities or place excessive strain on on-site generators.
Battery storage smooths those fluctuations by discharging electricity during periods of peak demand and recharging when consumption falls, improving operational efficiency while lowering overall energy costs.
The latest Megapack purchases bolster the AI industry’s shift, where energy infrastructure is emerging as a key competitive advantage alongside computing hardware.
As companies race to build increasingly powerful AI models, securing reliable electricity supplies, battery storage and grid capacity has become central to expansion plans. Industry leaders are investing billions of dollars in data centers, power generation and energy storage to ensure they can operate increasingly power-hungry AI systems without interruption.
However, the growing demand from AI operators also reinforces the importance of Tesla’s energy storage business, positioning Megapack deployments as a significant growth driver beyond the company’s electric vehicle operations.