Megapacks are designed to provide large-scale energy storage, helping data centers maintain stable power as AI workloads fluctuate. Unlike traditional computing facilities, AI infrastructure can experience rapid swings in electricity demand as models are trained or inference workloads increase. Battery systems can respond almost instantly, supplying additional electricity when needed while reducing peak demand on the local power grid.
The batteries are also used to provide backup power in the event of interruptions. By smoothing sudden spikes in energy consumption, operators can reduce utility demand charges and help maintain consistent performance across GPU-intensive AI systems.
The latest purchases build on earlier Megapack orders associated with xAI. Before the merger with SpaceX, xAI purchased $430 million worth of Tesla Megapacks for its data centers. During the first quarter of this year, xAI acquired an additional $34 million of the battery systems.
SpaceX's earnings report also disclosed that, as of December 2025, the company had purchased $131 million worth of Tesla Cybertrucks at the manufacturer's suggested retail price.
The transactions are conducted under Tesla's Related Person Transactions Policy because Musk holds leadership positions and significant ownership stakes in both companies. Such related-party transactions are commonly reviewed by investors and analysts, who often examine whether they are completed under market-standard terms.
The latest filings also underscore the growing role of energy infrastructure in AI development. While xAI has relied on natural gas generation to power parts of its data center operations, battery storage remains an important component of those facilities by providing fast-response power and supporting stable operation during periods of rapidly changing electricity demand.
This analysis is based on reporting from Whalesbook.
Image courtesy of Tesla.
This article was generated with AI assistance and reviewed for accuracy and quality.
