Why It Matters
The surge in data center construction across Pennsylvania threatens to outpace the state’s electricity supply, raising concerns about grid reliability for millions of residents. A new analysis by state regulators highlights the tension between rapid industrial expansion and the infrastructure needed to support it.
What Happened
The Pennsylvania Public Utility Commission (PUC) released a report on Monday warning that electricity shortages could become frequent if power supply does not keep pace with data center growth. The study, commissioned by state regulators, examines resource sufficiency as older plants retire and demand spikes.
PUC Chairman Steve DeFrank emphasized the need for balance, stating, “Pennsylvania is at an energy crossroads.” He noted that policymakers, regulators, utilities, generators, and consumer advocates must collaborate to ensure data center expansion does not compromise reliable and affordable service for existing customers.
The report outlines three potential futures. In a “worst case future” scenario featuring unrestrained data center growth and tight supplies, rolling blackouts could occur more than 13 days a year. Even in a moderate scenario where new power plants are built over the next 15 years, the regional grid would fall short of demands six times per decade on average.
The only scenario allowing PJM Interconnection—the organization that manages the high-voltage electric power grid—to achieve its reliability goal is one where no new data centers are built after 2026. Synapse Energy Economics found that under two forecast scenarios, system reliability would be six to 100 times worse than PJM’s planning standard by 2030.
Jon Gordon of Advanced Energy United argued that PJM is lagging in deploying lower-cost, quickly deployed clean energy and distributed resources. He noted that PJM’s “fast track” initiatives have focused on natural gas plants, which face long lead times for turbines and transformers.
By the Numbers
13 days — Minimum annual duration of rolling blackouts in the worst-case scenario.
six times per decade — Average frequency the grid would fall short of demands with new plant construction.
2026 — Year after which no new data centers are built in the reliability-compliant scenario.
100 times — Upper bound of how much worse system reliability could be compared to PJM’s standard by 2030.
67 million — Number of consumers served by PJM.
Zoom Out
The grid managed by PJM stretches from New Jersey to Illinois and from the New York border to North Carolina, serving a dozen other states and Washington, D.C. Pennsylvania risks losing its status as a net exporter of electricity as resources retire and new plants are built elsewhere.
Political responses in Harrisburg have been divided. House Majority Leader Matt Bradford’s spokesperson warned that failing to address reliability will cost lives and cause economic damage. The Democratic-led House passed bills to speed new generation, improve grid efficiency, and protect consumers from costs. However, Senate Republicans have not considered those proposals or sent meaningful legislation to the House.
Senate Majority Leader Joe Pittman blamed former Gov. Tom Wolf’s decision to join a regional carbon trading program for industry uncertainty. Meanwhile, Gov. Josh Shapiro, who is seeking reelection against Republican state Treasurer Stacy Garrity in November, has cited efforts including public pressure, litigation, auction price caps, and an accord with the Trump administration on market reforms.
Garrity previously criticized Shapiro’s embrace of data centers but now supports a pause on development and requiring data centers to bring their own power. Abe Silverman highlighted the strain on the system, saying, “That means we’re running the grid at the red line.”
What’s Next
As the November election approaches, the debate over how to balance industrial growth with grid stability will likely intensify. Lawmakers must decide whether to adopt measures that restrict data center expansion or accelerate infrastructure projects to meet rising demand. The outcome could determine whether Pennsylvania maintains its reliability standards or faces frequent power interruptions in the coming decade.