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A power auction conducted by PJM Interconnection, the nation’s largest electrical grid operator, is expected to add $6.3 billion in additional charges to the electricity bills of millions of households and businesses across 13 Eastern states and the District of Columbia within the next three years. The sharp increase stems from surging electricity demand tied to data centers.
PJM released the results of its 2028/2029 Base Residual Auction on Tuesday. The auction secured 138,318 megawatts of unforced capacity from generation and demand response resources to serve more than 67 million people in the region.
Power companies submitted bids indicating the prices they would accept to supply electricity during periods of peak demand. Those prices determine capacity payments that flow through to retail electricity rates paid by customers.
The clearing price reached the FERC-approved cap of $325 per megawatt-day, only slightly below the prior auction’s cap. Cleared supply at that price level totals approximately $16.4 billion in capacity value, though the full amount passed to ratepayers depends on hedging arrangements and self-supply contracts.
The auction also revealed a shortfall: committed resources fell 6,831 megawatts short of PJM’s reliability requirement, continuing a recent trend of tight supply margins.
“These auction results show that demand for electricity continues to grow faster than electricity supply,” David Mills, PJM president and chief executive, said in the announcement. “We are working with government and industry leaders on multiple fronts to restore that balance by bringing on new generation as fast as possible and managing the growth of new load on the grid.”
The load forecast used for this auction already incorporated continued growth from large data center projects, contributing to higher projected peak demand than in the previous cycle. PJM noted that data centers represent an ongoing addition to the reliability requirement calculations.
“All of these initiatives are critical to keeping the lights on while allowing states to protect their everyday electricity customers,” Mills said. “PJM will continue to collaborate with our state and federal partners and take decisive action to match electricity supply to the demands of the growing economy.”
PJM is advancing several measures to address the imbalance, including clearing the generation interconnection queue, developing flexible connection frameworks for large loads such as data centers, pursuing a special backstop procurement to secure additional resources, and facilitating long-term bilateral contracts between large customers and generators. The next base residual auction, for the 2029/2030 delivery year, is scheduled for December.
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