Shoals and ON.energy Advance U.S. Manufacturing for Nation’s Largest 1.1 GW Grid-Connected Battery Project at Hyperscale Data Center

Shoals Technologies Group, a global leader in electrical infrastructure solutions for the energy transition market, announced that manufacturing and deliveries are underway for a 1.1 GW hyperscale data center project under its commercial relationship with ON.energy, a developer of grid-safe power architecture for AI data centers. Once completed, the project will become the largest grid-connected battery installation in the United States, marking a significant milestone in the integration of energy storage with large-scale digital infrastructure.

The company has already shipped a substantial number of its PowerHub units for the initial phase of the project. Integrated with ON.energy’s patented medium-voltage AI UPS, PowerHub provides a scalable DC electrical architecture designed to support the reliable and efficient deployment of critical power infrastructure for AI data centers. For the initial phase, Shoals expects to manufacture approximately 360 PowerHub systems at its Tennessee Mega facility. Deliveries to the first phase are complete, with project commissioning expected to begin in early Q4. Deliveries to additional phases remain on schedule and are currently underway, underscoring Shoals’ ability to support large-scale infrastructure projects through domestic manufacturing.

“We spend a lot of time talking about growth opportunities in the market, but this is what execution looks like,” said Brandon Moss, CEO of Shoals. “Our teams in Tennessee are building, testing, and shipping products that are going directly into mission-critical energy infrastructure. This milestone is about more than one project. It shows our ability to manufacture at scale and deliver for customers.”

The collaboration highlights the growing demand for grid-safe power systems as AI campuses push unprecedented levels of new capacity online. Dax Kepshire, Chief Operating Officer of ON.energy, emphasized the strategic importance of the partnership: “AI campuses need grid-safe power systems as the industry works to bring unprecedented levels of new capacity online. We selected Shoals because of its proven track record in DC electrical systems and its ability to scale U.S. manufacturing rapidly to support the speed and scale the industry requires. Together, ON.energy and Shoals are delivering the largest battery project in the United States, in record time.”

Beyond the initial deployment, Shoals and ON.energy have expanded their collaboration to support multiple additional project sites throughout the United States. “This is exactly the kind of progress we want to see: projects moving from design toward deployment,” added Moss. “The initial project, together with the additional opportunities we are pursuing with ON.energy, reflects the commercial potential of the relationship and the growing need for scalable power infrastructure serving AI data centers. We believe this work provides a strong foundation for continued collaboration.”

The project underscores a broader industry trend in which data center operators and technology providers are increasingly turning to integrated battery storage and advanced electrical architectures to ensure grid stability and power reliability. As AI workloads continue to scale, the ability to deploy large-scale, domestically manufactured energy infrastructure will become a critical competitive advantage for companies across the sector.