SpaceX has spent $329 million this year on purchases of Tesla's large energy storage system (ESS) Megapack. TechCrunch reported on Aug. 4 that SpaceX invested $295 million in Megapack in the second quarter. The purchases underscore links among companies led by Elon Musk, who runs SpaceX and co-leads Tesla, while xAI bought X in 2025 and was absorbed by SpaceX early this year. The market expects the batteries to be used at xAI data centres, where power demand can surge.