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ON.Energy says its centralized battery system, designed to protect data center equipment while limiting disruptive effects on the grid, passed multi-megawatt trials at the National Laboratory of the Rockies. The company is preparing a commercial-scale deployment under a 5-gigawatt order from data center developer Crusoe, though details of the project and its performance at that scale remain unclear.
ON.Energy says its battery-based uninterruptible power supply system passed multi-megawatt testing at the National Laboratory of the Rockies, moving the startup closer to a commercial-scale test at data center developer Crusoe. The system is designed both to keep computing equipment supplied with stable power and to reduce the abrupt changes in electricity demand that can stress the grid.
The startup describes its product as an AI UPS: a centralized battery system installed between the grid and a data center. Unlike conventional UPS units, which typically use lead-acid batteries and provide backup during power problems, this system is intended to continuously manage power flows. ON.Energy CEO and co-founder Alan Cooper said the design combines functions associated with a data center UPS and a grid-scale battery energy storage system.
Cooper said the technology completed trials at the Colorado laboratory, where grid simulator tests were run at multi-megawatt configurations. Shahil Shah, the laboratory’s chief engineer, said he oversees testing of ON.Energy’s system as well as a similar battery system from Prevalon Energy. The report does not provide detailed trial results, test conditions or independent performance figures.
ON.Energy is preparing to deploy the system at commercial scale after receiving a reported 5-gigawatt order from Crusoe, a major AI data center developer. The source report does not specify how that order is measured, how many sites it covers, or the deployment schedule. Cooper said the system requires data centers to be designed with space and infrastructure for centralized batteries; it is not simply an add-on for any existing facility.
Buffering Data Centers From Grid Shocks
Data centers are large electricity users whose demand can change quickly as computing activity shifts. Shah said power use at a facility can move from 5% to 100% in a few milliseconds, potentially placing a sudden burden on the grid. A centralized battery that smooths those changes could help grid operators manage the growth of large computing loads, while also supplying the stable power data center equipment requires.
A second risk arises when a facility disconnects from the grid after a power-quality disturbance. That can cause a large, unexpected fall in electricity demand, complicating the work of balancing supply and demand. The report cites a July incident in which nearly 4 gigawatts of data center load in Virginia disconnected from the grid. It does not establish that ON.Energy’s technology would have prevented that event, but it illustrates the scale of disruption grid operators are working to manage.
If the system performs as intended, batteries could provide value beyond emergency backup, potentially making them easier for data center operators to justify. But the commercial case remains unproven in the material available: no pricing, operating-cost comparison or measured savings are given.
From Backup Batteries to Grid Assets
Data centers have long used uninterruptible power supplies to keep servers running when utility power flickers or fails. Those systems generally act as backup rather than as assets that continuously interact with the grid. Developers have often favored fossil-fuel generation for around-the-clock supply, while battery investments can be difficult to justify without a clear financial return.
The proposed approach places lithium-ion batteries between the utility connection and the data center load, using power electronics to manage the electricity delivered to each side. Cooper said ON.Energy’s patented double-conversion technology electrically separates the computing load from the generation source. Shah said grid operators are developing requirements to prevent large data center loads from undermining grid reliability, making systems that control those interactions increasingly relevant.
ON.Energy is not alone in pursuing the concept. Shah said the laboratory is also testing a system from Prevalon Energy and other technologies that he could not identify. The development is part of a broader effort to adapt grid-management tools to the rapid expansion of data center demand.
“The grid sees a battery that’s always charging, and the load sees a battery that’s always outputting perfect quality power.”
— Alan Cooper, ON.Energy CEO and co-founder
Commercial Performance Still Untested
The reported laboratory trials are a step toward deployment, but the available information does not include detailed measurements, test protocols or an independent assessment of results. It is also unclear when the Crusoe project will begin operating, what facilities the 5-gigawatt order covers, or whether that figure represents contracted capacity, planned deployment or another measure.
There are no reported figures for the system’s cost, efficiency, battery duration, expected lifespan or savings compared with conventional UPS equipment and backup generation. Nor is there evidence yet in the source material that the system has reduced grid disturbances during live commercial operation. Its performance and economic value at data center scale remain to be established.
Crusoe Deployment Will Test Scale
The next major milestone is the planned commercial deployment linked to Crusoe’s order. Cooper said new data centers must be designed to accommodate the centralized system, and the report describes a Crusoe campus under construction with space set aside for batteries at a newer building. The companies have not provided a specific commissioning date or a detailed rollout plan in the source material.
Further evidence will depend on operational data from deployment: how the batteries respond to rapid load changes, whether they maintain power quality for computing equipment, and how reliably they limit disruptions seen by the grid. Those results, along with disclosed project costs and performance measures, will help determine whether the model can move beyond testing and become a practical option for more data centers.
Key Questions
What is ON.Energy’s AI UPS?
It is a centralized battery system designed to sit between the grid and a data center. ON.Energy says it combines backup power functions with active management of electricity flows.
How is it different from a traditional data center UPS?
Traditional UPS systems generally provide emergency backup, often using lead-acid batteries. ON.Energy’s proposed system uses centralized batteries intended to operate continuously and also help manage the data center’s interaction with the grid.
Has the system been proven at a commercial data center?
Not according to the information reported so far. ON.Energy says it completed multi-megawatt laboratory trials; the Crusoe order is intended to take the system toward commercial-scale testing.
What does Crusoe’s 5-gigawatt order mean?
The report describes it as a 5-gigawatt order but does not explain what the figure measures, how many sites it covers or the deployment timetable. Those details remain unconfirmed in the source material.
Why could data centers affect grid stability?
Their electricity demand can change rapidly, and they may disconnect suddenly after power disturbances. Those shifts can complicate grid operators’ efforts to balance electricity supply and demand.
Source: rss
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