FERC orders PJM to count virtual power plants, adding 4.9 GW to capacity market supply stack
Federal regulators sided with Voltus and Mission:data in a ruling that forces the nation's largest grid operator to integrate demand-side resources into its capacity market.
Federal regulators ruled late last month that PJM Interconnection must recognize virtual power plants in its capacity market, agreeing with complainants Voltus and Mission:data that the grid operator is currently excluding at least 4.9 gigawatts of eligible capacity — the equivalent of several large power plants — at a moment when PJM faces load growth driven by data centers and electrification.3
The scale of the exclusion matters for capacity price formation. PJM's capacity auctions have cleared at record-high levels in recent delivery years as supply tightened against surging demand. Bringing nearly 5 GW of aggregated demand response and distributed energy resources into the supply stack could exert downward pressure on future auction clearing prices, though the magnitude depends heavily on implementation.3
FERC's ruling does not fix a price outcome. PJM must now revise its tariff and market rules through stakeholder proceedings and compliance filings, a process that typically takes a year or more. Market participants are left holding a structural commitment to change without knowing its operational shape.3
The practical gap between eligible capacity and delivered capacity is real. Virtual power plant operators must demonstrate reliable performance when called upon, and PJM has historically applied rigorous scrutiny to demand-side resource dispatch. The 4.9 GW figure represents what the regulator says is being locked out by current rules, not a guarantee of future auction participation.3
Layered over the market design question is a sharper political risk. The Supreme Court's June 29 decision in Trump v. Slaughter significantly expanded the president's power to remove regulators at will, and former FERC commissioners from both parties have said the ruling could compromise the commission's independence.2 As a Harvard Law analysis of the ruling put it, there is no longer any legal doctrine stopping a president from removing any FERC member if that commissioner took an action the administration opposed.1
That exposure is not abstract for market participants. FERC is now making consequential capacity market design decisions — the PJM virtual power plant ruling among them — without the institutional insulation commissioners once had. A future administration that prefers conventional generation resources could use the removal power to push FERC toward rules less favorable to demand-side aggregators. One that favors distributed energy could accelerate integration. Either way, the political variable now sits inside the regulatory calculus for anyone pricing PJM capacity.1
For traders and capacity buyers, PJM's compliance filing is the nearest concrete signal. That document will set the specific rules around aggregation size thresholds, performance penalties, and baseline measurement methodologies. Those mechanics, not the headline gigawatt figure, govern how much new supply actually enters future auctions.3
Until PJM files and FERC accepts a compliance tariff, the market operates under existing rules while anticipating a shift. The next capacity auction will be the first observable test of whether the order changes price formation or extends the period of regulatory uncertainty that buyers and sellers are already pricing.3