Cummins (NYSE: CMI) said on August 18, 2026 that its Power Systems business has been selected to supply its largest-ever battery energy storage system for a big U.S. data-center project — a deal the company frames as validation that BESS has become table stakes for hyperscale AI campuses.
What the system does
The BESS will handle utility-defined requirements for AI-driven load fluctuations, mitigate load oscillations at the interconnection and support ride-through performance. Because AI training clusters can swing tens of megawatts in seconds, grid operators are increasingly demanding on-site storage that can charge or discharge fast enough to prevent those swings from hitting the wider network.
The spec sheet
Cummins BESS uses lithium iron phosphate (LFP) chemistry with liquid-cooling thermal management, 5 MWh nominal capacity per block, a flexible DC block architecture compatible with multiple PCS and EMS ecosystems, and is bridge-to-grid ready for integration with diesel and natural gas gensets. Certifications span UL 9540A, UL 9540, UL 1973, NFPA 855, NFPA 68, IEEE 1547 and UL 1741 SA/SB.
Where Cummins fits
Launched in May 2025, Cummins BESS extends a diesel-and-gas backup franchise that has anchored the data-center standby market for decades. The company is going head-to-head with pure-play battery vendors — many of them Chinese — as U.S. hyperscalers push to add utility-scale storage at every site. Arevon's 300MW/1,200MWh Nighthawk in California and LG Energy Solution's new $4B Michigan plant for Tesla Megapack 3 illustrate how quickly the front-of-meter LFP market is scaling.
Why this matters
Financial terms, location and customer identity are undisclosed. But Cummins Power Systems president Jenny Bush said BESS is now "emerging as a strategic power enabler" for developers hitting grid constraints and multi-year interconnection queues — a message aimed squarely at investors weighing AI power picks and shovels.
Reporting based on coverage from Cummins Newsroom, BusinessWire and WRTV Indianapolis.