On April 15, 2026, the Federal Energy Regulatory Commission (“FERC”) imposed a $722 million civil penalty against American Efficient, LLC (“American Efficient”) and its affiliates in one of the largest enforcement actions in FERC’s history. Over more than a decade, the company collected roughly half a billion dollars in capacity market payments from PJM and MISO by claiming credit for energy efficiency resources that, according to FERC, it neither owned, controlled, nor caused to exist.
The case exposes fundamental gaps in how wholesale electricity markets verify demand-side resources, particularly energy efficiency. The dispute turned on two tariff requirements: that an energy efficiency resource provider must “own or have the contractual authority to control” its resources’ load reduction capability, and that its program must be “designed to achieve” energy reductions. FERC found American Efficient satisfied neither—and signaled that the era of light-touch oversight of energy efficiency resources may be ending.
FERC’s decision comes just as data center development is forecast to drive demand for electric power upward nationwide, and energy efficiency resources represent one of the most deployable and scalable sources of additional capacity available. To support the data center boom cost-effectively, regulators and grid operators (Regional Transmission Organizations, or “RTOs,” and Independent System Operators, or “ISOs”) must thread the needle: stringently verifying energy efficiency contributions without excluding these resources from important revenue streams like capacity markets.
Demand Response Resources in Capacity Markets
Capacity markets are mechanisms used by certain regional grid operators to ensure sufficient electricity generation is available to meet future demand. Unlike energy markets, which compensate generators for electricity actually produced, capacity markets pay resources for the commitment to produce power when needed. RTOs/ISOs like PJM and MISO administer these markets through competitive auctions under FERC oversight.
Beginning in 2009, PJM and MISO opened these auctions to energy efficiency resources—a category of demand-side participation that reduces peak demand rather than generates electricity—and compensated those resources as if they were contributing generating capacity. After all, a megawatt saved (or a “negawatt”) is the same as a megawatt generated in the eyes of a grid operator. But energy efficiency resources present a verification problem that traditional generation does not.
Capacity markets were designed around large, physical generation assets—power plants with known locations, metered output, and well-understood operational characteristics. Because a power plant’s output can be metered in real time, its capacity contribution can be easily verified. Even the capacity contributions of demand response programs, which direct consumers to reduce consumption during high-demand periods, can be confirmed with relative ease.
An energy efficiency resource’s contribution, by contrast, depends on counterfactual claims. Its capacity bid represents a guarantee that certain load-reducing or load-shifting appliances have been installed, will reduce consumption, and—critically—would not have been installed absent the provider’s intervention. This last requirement, known as “causation” or the “but for” test, distinguishes genuine load reduction from mere data aggregation.
The Verification Gap
As FERC explained in the American Efficient case, neither PJM nor MISO implemented meaningful causation requirements, instead relying on a framework built for supply-side assets that was ill-suited for demand-side verification. PJM and MISO’s system for incorporating energy efficiency resources into capacity auctions depended heavily on self-certification by the provider. PJM’s verification template, for example, stated that “PJM intends to rely solely on the sworn statement or affirmation of the [Energy Efficiency] Resource Provider” regarding its contractual authority over load reduction. PJM told American Efficient that it had not reviewed the company’s underlying contracts with its retail partners and “does not review or endorse . . . internal business practices.” For years, American Efficient operated on attestations and measurement-and-verification plans that, as FERC ultimately found, described a program that did not function as represented.
The informational asymmetry was stark. Unlike utility-run energy efficiency programs—which are supervised by state regulators and subject to load reduction audits—merchant demand-side providers have leeway to operate with far less scrutiny under grid operator-supervised self-certification frameworks. American Efficient exploited this gap: it had no contracts with end-use customers, provided no rebates or incentives, conducted no studies on purchasing behavior, and had no mechanism to verify product installation. Yet its bids cleared capacity auctions year after year, ultimately representing over 70% of PJM’s energy efficiency market.
Implications for Market Participants
Both PJM and MISO have decided to sunset energy efficiency resource participation in their capacity markets—decisions FERC approved in 2024 and 2025, respectively. These RTOs/ISOs’ turn away – at least temporarily – from energy efficiency resource participation in capacity markets likely will impair their ability to respond to rising demand for electric power driven by data centers and the AI economy.
But the implications extend well beyond these programs. The American Efficient case—alongside the Ketchup Caddy enforcement action involving fraudulent demand response resource registrations and a recent Voltus settlement over uncontracted demand response resources—reflects a clear pattern: FERC and RTO/ISO market monitors are paying heightened attention to demand-side participants and the integrity of their market claims.
Notably, Commissioner LaCerte’s concurrence in the American Efficient case even calls for criminal referral to the Department of Justice, finding that “[t]he facts warrant civil and criminal accountability” and that “[r]atepayers deserve both.”
The order likely will serve as guidance on FERC’s expectations for RTOs/ISOs and energy efficiency resource providers, and more broadly as precedent for enforcement against similar schemes claiming “environmental attributes” without actual additionality. Companies that develop mechanisms for demonstrating genuine, verifiable load reduction—with transparent contractual structures, meaningful customer engagement, and robust compliance programs—will be best positioned to participate in whatever verification framework FERC may institute for energy efficiency resources participating in the wholesale markets.
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