SemiAnalysis Alleges $12 Billion Ratepayer Waste in PJM Capacity Market
A critical analysis claims a flawed reliability model has artificially inflated electricity costs for 67 million people.
PJM Interconnection, the Regional Transmission Organization serving approximately 67 million people across 13 states and the District of Columbia, is facing allegations that a flawed reliability model has cost ratepayers billions of dollars. A report from SemiAnalysis claims that PJM's modeling errors have led to an estimated $12 billion in wasted funds between 2025 and 2027.
According to SemiAnalysis, the waste stems from the Reserve Requirement Study (RRS), the model PJM uses to determine the volume and type of power plants required to maintain grid reliability. The report alleges that the RRS methodology dramatically overstated the supply-and-demand shortfall, creating an artificial scarcity that drove up capacity prices. SemiAnalysis further claims that these auction design and modeling choices have contributed to a roughly 20% increase in household electricity bills across the PJM region.
The Capacity Price Crisis
To ensure the lights stay on, PJM operates a capacity market where power plants are paid to remain available for future years. The RRS acts as the critical "black box" that calculates the Forecast Pool Requirement, which effectively sets the target for these auctions.
Recent data confirms a massive surge in these costs. Capacity prices for the 2025/26 and 2026/27 auctions have reached record highs, clearing at approximately $329 to $333 per megawatt-day. This represents a significant jump from previous years, such as the 2024/25 delivery year. PJM has attributed these price spikes to a combination of factors, including rapid load growth—driven largely by the expansion of data centers—generation deactivations, and updates to risk modeling.
Market Implications
Because capacity market prices directly influence the retail electricity rates paid by millions of consumers, the accuracy of the RRS model is a matter of significant financial consequence. If the model is fundamentally flawed, as SemiAnalysis alleges, the result is a massive transfer of wealth from ratepayers to power plant owners without a corresponding increase in actual grid reliability.
What's Next
While the price spikes and the role of the RRS are confirmed, the specific claim of $12 billion in waste remains a single-source allegation based on SemiAnalysis's own reverse-engineering of the model. These figures have not been independently verified by government audits or regulatory bodies. Observers will be watching to see if state regulators or federal authorities launch formal investigations into PJM's modeling methodology to determine if the alleged overstatements are accurate. Such an investigation would be necessary to confirm whether the current pricing reflects genuine grid needs or a systemic modeling failure.