Boulder, Colorado — Electrical equipment manufacturer ON.energy has successfully completed construction of its AI-focused uninterruptible power supply (UPS) at the National Laboratory of the Rockies (NLR) in Boulder. The system, the company claims, is the first medium-voltage UPS engineered specifically to meet the unique demands of AI data centers.
In collaboration with NLR, ON.energy will rigorously test the UPS at the lab’s Flatirons Campus, home to an advanced grid simulator and the Advanced Research on Integrated Energy Systems (ARIES) research platform.
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“Our deployment at NRL’s Flatirons lets us provide extensive performance validation of our AI UPS meeting each customer’s unique requirements in a controlled environment,” said Dax Kepshire, president of ON.energy’s data center division.
Under the agreement, NLR will simulate the full range of AI data center power conditions, including GPU workload spikes and grid fluctuations in both on-grid and off-grid scenarios. The tests are designed to evaluate how ON.energy’s UPS stabilizes power loads, protects data centers, and supports the broader electric grid during disturbances.
“NLR is committed to advancing technologies that improve the flexibility and reliability of the nation’s power systems and at the speed this sector demands,” said Andrew Hudgins, ARIES Laboratory program manager. “With ON.energy the teams have gone from first contact through contracting and construction in less than six months here at Flatirons Campus.”
The installation will also allow clients to conduct their own validation scenarios in a controlled environment—a feature already drawing attention from major hyperscalers in the industry.
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Launched in October 2025, ON.energy’s medium-voltage UPS is designed to scale from megawatt to gigawatt levels. Its capabilities include absorbing transient loads from GPU clusters, stabilizing the grid, and protecting on-site generation for AI-intensive operations. In December, ON.energy also signed a 5GW transformer supply agreement for U.S. data center and renewable energy infrastructure projects.
Founded in 2016 and headquartered in Miami, Florida, ON.energy develops UPS systems and utility-scale energy storage solutions, with over 400MWh currently under construction. The company is part of a growing wave of suppliers focused on AI-specific power systems, including Solidion Technology, which announced its Peak Series UPS in October aimed at AI data centers.
“The rapid deployment and testing capabilities here at NLR provide a real-world benchmark for AI-focused UPS systems,” said Kepshire. “It’s not just about keeping systems running—it’s about giving our customers confidence in the reliability and scalability of their operations.”
This initiative highlights the increasing importance of tailored power solutions in AI-driven data centers, as workloads grow faster than traditional infrastructure can accommodate. ON.energy’s AI UPS is positioned to meet these demands while also supporting grid stability across diverse operating conditions.
Originally reported by Zachary Skidmore in Data Center Dynamics.
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