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Ardent Data Centers' Robinson location opened in 2025. (Photo by Frank Garland)

PUC advances model tariff for high energy demand customers, including data centers

The Pennsylvania Public Utility Commission on Thursday advanced a proposed model tariff aimed at regulating large electricity users — including rapidly expanding data centers — in a move officials say is designed to manage rising demand while protecting existing customers.

The commission voted 5-0 to adopt a motion from Chairman Steve DeFrank modifying a draft final order under consideration at its public meeting in Harrisburg. A revised final order reflecting those changes is expected in the coming days.

The action follows an extensive review process that included an en banc hearing – a hearing attended by the full commission – as well as multiple rounds of public comment and input from utilities, large-load customers, consumer advocates and other stakeholders.

“This is an unprecedented time for our electrical grid — one that presents both significant challenges and important opportunities,” DeFrank said in a statement. “Data centers and advanced manufacturing are driving a level of load growth that we have not seen in generations.”

The West Hills is home to one existing data center – Ardent Data Centers’ Robinson Township location – and Stowe Township recently amended its zoning ordinance to allow for the building of data centers in the township’s general industrial district.

The PUC’s proposed model tariff is intended to provide a consistent framework for Pennsylvania’s electric distribution companies as they evaluate and serve customers with significant energy demands. The commission said the goal is to improve transparency, support long-term system planning and prevent additional costs from being shifted to residential and small-business customers.

Under the framework, large-load customers are defined as those requiring more than 50 megawatts individually or 100 megawatts in aggregate. The proposal emphasizes that such customers should bear the cost of infrastructure upgrades needed to connect them to the grid.

The plan also calls for financial protections, including deposits or collateral, to ensure utilities are not left with stranded costs if projects fail to materialize or fall short of projected demand.

Additional provisions address interconnection timelines, requiring utilities to complete studies within six months, and establish guidelines for contracts, including terms related to ramping up electricity use and early termination.

The tariff would also require each electric distribution company to maintain a public online queue listing large-load interconnection applications, including location, size and project status.

Commission officials said the changes come as utilities nationwide grapple with surging demand driven by data centers and other energy-intensive industries. Key concerns include maintaining grid reliability, planning for infrastructure upgrades and ensuring existing customers are not burdened with new costs.

The model tariff will serve as a framework for future utility-specific filings, which will still require commission approval. Regulators said they will continue monitoring large-load growth and working with stakeholders to ensure the state’s electric system remains reliable and affordable.

The commission said the final order will be released after completing its standard post-meeting review process.



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