The transition to renewable energy sources is reshaping the U.S. electricity landscape dramatically, with wind and solar power now contributing over 20% of the national electricity supply. This rapid expansion — more than doubling clean energy production since 2000 — marks a significant shift away from traditional fossil fuel-based generation. However, prominent power outages such as the 2021 Texas blackout and California’s repeated rolling outages reveal systemic vulnerabilities in how electrical grids manage energy delivery during peak demand periods. These incidents underline not generation capacity but rather the critical challenge of ensuring reliable power availability when it is most urgently needed.
Chiara Lo Prete, an associate professor specializing in energy economics at Penn State’s John and Willie Family Department of Energy and Mineral Engineering, emphasizes that modern electricity markets face increasing difficulty in balancing the intermittency of renewables and the dynamics of natural gas generation. The core problem extends beyond mere energy production; it involves creating market structures that incentivize the consistent availability of dispatchable resources precisely when consumption spikes occur. These concerns come at a juncture where electricity demand is set to surge dramatically — forecasted to increase by 25% by 2030 and nearly 80% by 2050 — as electrification expands into transportation and data center operations.
In addressing these complexities, a team led by Lo Prete, in collaboration with Washington D.C.-based nonprofit Resources for the Future (RFF), conducted an in-depth review of eleven contemporary electricity market design proposals, all yet to be field-tested. These proposals vary widely in scope, ranging from incremental adjustments to current systems to radical overhauls that incorporate long-term contract auctions and dual market mechanisms combining short- and long-term energy trading frameworks. The researchers stress the necessity for market reforms that enable utility operators to recover both fixed and variable costs, which would be instrumental in fostering enhanced system reliability amid an evolving energy matrix.
Published in the journal Energy Economics, the study underscores the urgency of redesigning electricity markets in a way that aligns with the realities of a clean energy future. Today’s market architecture, largely frozen since reforms in the late 1990s, was originally constructed around thermal power plants fueled by coal, natural gas, and nuclear energy. These frameworks are ill-equipped to integrate emerging technologies like large-scale battery storage or to accommodate the variable nature of renewables. Consequently, the study argues that forward-looking market designs must reward investments that enable the scheduling and availability of flexible resources, including advanced storage and demand response capabilities.
A noteworthy aspect of the proposed reforms involves mandatory forward contracts that obligate electricity distributors to secure power supplies ahead of time. This contractual mechanism could prove vital for underpinning investments in resources critical to decarbonization goals by providing revenue certainty. Such markets would encourage infrastructural commitments that might otherwise be deemed too risky under current uncertain price signals. The study highlights that this approach, by ensuring that generators are compensated for capacity availability and not just energy produced, could mitigate the risk of future blackouts like those experienced in Texas and California.
The challenges of forecasting electricity demand become even more pronounced when considering the accelerating electrification of previously untapped sectors. The transportation sector’s transition to electric vehicles, coupled with the proliferation of power-hungry data centers, introduces unprecedented variability and scale in consumption patterns. The study identifies that grid operators and market designers must develop predictive tools and operational strategies that dynamically respond to these demand shifts, considering both temporal and spatial dimensions of energy use.
In their comparison of market proposals, Lo Prete and colleagues found that regulatory fragmentation across states and jurisdictions hampers the integration of clean energy policies into wholesale electricity markets. The study notes the regulatory complexity as a significant barrier to effective market reform, calling for enhanced coordination among federal, regional, and state agencies. Concerted regulatory oversight could better align policy objectives with market incentives, facilitating the deployment of flexible clean energy resources.
Another critical insight from the study is the enduring importance of maintaining a diversified energy portfolio. Although coal-fired power plants have seen their share decline from 23% in 2000 to just 8% of primary energy consumption last year, these legacy assets continue to provide vital grid stability services. The markets of the future must balance innovation with reliability, ensuring that retiring fossil infrastructure is responsibly managed without compromising system adequacy.
The researchers caution, however, that the diversity of proposals reflects the experimental nature of electricity market innovation today. Many concepts remain in nascent stages, making clear policy endorsements premature. Moreover, the current markets appear deficient in incentivizing necessary investments for long-term resource adequacy, a gap that reforms aim to address. The authors advocate for a collaborative approach among energy market researchers, emphasizing accessible communication and stakeholder engagement to refine and validate market redesign efforts.
Drawing lessons from the power system failures of recent years, the research highlights that lack of accessible energy capacity during critical peaks remains the fundamental vulnerability. Each of the notorious incidents — Texas in February 2021, California’s summer 2020 rolling outages, and near-blackouts in Fall 2022 — stemmed not from insufficient aggregate capacity but from inadequate real-time dispatchable power availability. This fact bolsters the imperative for markets to evolve beyond mere spot energy transactions, embracing mechanisms that secure dependable, flexible capacity.
The study’s findings have significant implications for the ongoing energy transition, particularly in aligning electricity market designs with decarbonization imperatives and reliability standards. As the landscape of power generation evolves, electricity markets must shift toward frameworks that integrate long-term resource planning, incentivize energy storage, and accommodate renewable generation variability. These market upgrades are essential not only for preventing blackouts but also for enabling sustainable growth in electricity demand driven by emerging technologies and climate goals.
At a fundamental level, this work illuminates the intersection of economics, engineering, and policy required to govern the future electricity grid effectively. By leveraging computational modeling and market analysis, Lo Prete and her collaborators provide a roadmap to upgrading market structures to meet the complex demand of the 21st-century power system. Their research features broad collaboration and draws on support from the National Science Foundation and Penn State, underscoring the vital role of federally funded research in shaping practical, forward-thinking solutions.
In conclusion, the wholesale electricity markets that underpin the U.S. power system stand at a crossroads. The shift towards a low-carbon future, coupled with rising demand and technological change, demands urgent reconsideration of market designs. Embedding forward contracts, enhancing regulatory coordination, and fostering investment incentives in flexible capacity will be crucial steps. Only through such market innovations can the promise of renewable power be fully realized — delivering clean, reliable energy on demand, preventing future outages, and enabling a resilient, sustainable grid.
Subject of Research: Not applicable
Article Title: Time for a market upgrade? A review of wholesale electricity market designs for the future
References:
Lo Prete, Chiara et al. “Time for a market upgrade? A review of wholesale electricity market designs for the future.” Energy Economics, vol. 108640, 1 Aug. 2025. DOI: 10.1016/j.eneco.2025.108640
Read more on Scienmag: Latest Science and Health News
