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Data centers are becoming power plants – this NJ project proves it

Calibrant Energy has signed a definitive agreement with Iron Mountain to build, own, and operate a 23-megawatt-hour (MWh) battery at the latter’s New Jersey data center.

Data center as a clean energy source?

The battery storage system will be paired with the facility’s existing 7.2-MW rooftop solar array as part of Iron Mountain’s push toward 24/7 carbon–free energy at its data centers.

The project points to a bigger shift: Power-hungry data centers are starting to manage electricity more like a controllable asset than a fixed load, and Calibrant says its build-own-operate model helps customers cut costs while improving reliability.

The system uses real-time controls to decide when to store energy and when to deploy it. During peak demand, the stored energy can be dispatched to reduce strain on regional infrastructure, helping avoid the need for additional fossil-fuel-based power generation.

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Iron Mountain says storage is part of a broader strategy to support the local energy ecosystem, improve efficiency for utilities and customers, and increase reliability for its own operations.

Electrek’s Take

America’s data-center boom is about to collide with the power grid. The Electric Power Research Institute (EPRI) projects that data centers could consume up to 9% of US electricity generation by 2030 – more than double the 2023 level.

That’s why data center projects like Iron Mountain’s matter: pairing solar with battery storage on-site can add resilience and secure cleaner power without waiting years for transmission upgrades. These on-site systems will be a bigger piece of the puzzle for data centers that don’t want to get left behind on reliability and sustainability.

Read more: This European company’s sleek solar roof just made its US debut


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Avatar for Michelle Lewis Michelle Lewis

Michelle Lewis is a writer and editor on Electrek and an editor on DroneDJ, 9to5Mac, and 9to5Google. She lives in White River Junction, Vermont. She has previously worked for Fast Company, the Guardian, News Deeply, Time, and others. Message Michelle on Twitter or at michelle@9to5mac.com. Check out her personal blog.