Reliable incoming power is the constraint that sits below every large-scale AI compute buildout. Training workloads draw sustained, predictable electricity at a level where momentary grid disruptions become consequential: a supply event long enough to trip a facility can abort an active run and force operators back to the last saved checkpoint, losing hours or days of compute time. Battery energy storage addresses that exposure by sitting between the grid feed and the facility load, absorbing interruptions before they reach the hardware. SpaceX moved further in that direction during Q2, increasing its purchases of Tesla's Megapack systems to support its Colossus AI data centers in Greater Memphis.
Where Megapack sits in this stack
Tesla's Megapack is a large-format stationary battery built for utility and commercial energy storage applications. In a data center context, it operates in a backup capacity: a local energy buffer that holds the facility load through a grid disruption while primary supply is restored. SpaceX is deploying these systems at Colossus in that role.
The Colossus facilities are located in Greater Memphis. The scope of the Q2 procurement, including unit count or total installed capacity, has not been disclosed by either company.
Reading the supply chain signal
Battery storage orders tend to lead facility activation by a meaningful margin. Megapack units require delivery, physical installation, commissioning, and integration with a site's power management systems before compute hardware can safely draw against them. A Q2 ramp in purchasing points to continued capacity expansion at Colossus rather than maintenance of an already-operational footprint.
For Tesla, the arrangement adds SpaceX as a named commercial account pulling on its Megapack output. Demand from AI data center operators has become a visible source of orders for grid-scale battery systems as infrastructure buildouts for large model training and inference have grown. SpaceX's buying activity at the Memphis operation is a concrete slice of that demand.
The Colossus AI data centers in Greater Memphis are where SpaceX directed its Q2 Megapack purchasing.