WHY THE CLEAN ENERGY INDUSTRY SHOULD BE INTERESTED IN RESOURCE ADEQUACY

This policy brief by Energy Innovation examines how the transition to clean energy challenges traditional 'resource adequacy' planning—the process of ensuring grid operators have sufficient resources to balance supply and demand. The author argues that historical planning paradigms, which rely on dispatchable fossil fuel plants and simple peak-demand metrics, are becoming inadequate as variable renewable energy (VRE) and distributed energy resources (DERs) increase. The document warns that fossil fuel incumbents are leveraging these reliability concerns to protect their market share and slow decarbonization, urging climate advocates to promote more granular, flexible, and holistic planning models.

• To achieve a modest climate goal of 80% clean energy by 2050, the power sector must accelerate its capacity additions from 1 percent of the system mix per year to 3 percent per year.
• The historical resource adequacy paradigm relied on the assumption that plants were dispatchable 'at will' and that real-time fuel costs were the primary driver for determining the most cost-effective resources to run or plan for.
• The rise of variable renewable energy and distributed energy resources (DERs) creates two primary resource adequacy challenges: first, they displace 'baseload' resources (like coal and nuclear) that provided reliability during peak stress; second, the inflexibility of remaining fossil fuel resources struggles to match the increased variability of net load, exemplified by California's 'duck curve'.
• Grid planners have traditionally used the Planning Reserve Margin (PRM) as a heuristic to meet a 'one-in-ten' reliability threshold (one hour or event of unserved load every ten years), typically targeting a PRM of at least 15 percent.
• The PRM heuristic is increasingly inadequate because it reduces complex probabilistic production outcomes into a single capacity value, failing to account for off-peak scarcity, the physical limits of dispatchable generators, and the specific flexibility needs that differ from peak demand needs.
• Fossil fuel incumbents are employing a strategy to delay the energy transition by fostering fear regarding grid reliability, rewriting capacity market rules to their advantage, and creating barriers for competitors like third-party demand response providers and energy storage.
• PJM, the largest independent system operator, is cited as an example of an entity dominated by fossil-affiliated owners whose rules for capacity qualification require energy storage to sustain maximum output for up to ten hours, a requirement the author suggests is not supported by objective analysis.

APA

GIMON, E. (2020). WHY THE CLEAN ENERGY INDUSTRY SHOULD BE INTERESTED IN RESOURCE ADEQUACY. Energy Innovation. https://energyinnovation.org/wp-content/uploads/Why-The-Clean-Energy-Industry-Should-Be-Interested-In-Resource-Adequacy-FINAL.pdf

Chicago

GIMON, ERIC. WHY THE CLEAN ENERGY INDUSTRY SHOULD BE INTERESTED IN RESOURCE ADEQUACY. Energy Innovation, 2020. https://energyinnovation.org/wp-content/uploads/Why-The-Clean-Energy-Industry-Should-Be-Interested-In-Resource-Adequacy-FINAL.pdf.

Wikipedia

{{cite report |last1=GIMON |first1=ERIC |title=WHY THE CLEAN ENERGY INDUSTRY SHOULD BE INTERESTED IN RESOURCE ADEQUACY |publisher=Energy Innovation |date=July 2020 |url=https://energyinnovation.org/wp-content/uploads/Why-The-Clean-Energy-Industry-Should-Be-Interested-In-Resource-Adequacy-FINAL.pdf |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{gimon2020why, author = {GIMON, ERIC}, title = {{WHY THE CLEAN ENERGY INDUSTRY SHOULD BE INTERESTED IN RESOURCE ADEQUACY}}, institution = {Energy Innovation}, year = {2020}, month = jul, url = {https://energyinnovation.org/wp-content/uploads/Why-The-Clean-Energy-Industry-Should-Be-Interested-In-Resource-Adequacy-FINAL.pdf}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }