GRID RELIABILITY IN THE CLEAN ENERGY TRANSITION

The report examines the technical and institutional challenges of maintaining grid reliability in the United States as fossil fuel plants retire and demand grows from data centers and electrification. It argues that reliability does not require traditional baseload power but can be achieved through a combination of wind, solar, battery storage, and demand-side flexibility. The authors highlight that while 80-90% clean electricity is achievable with current technology, reaching 100% may require 'clean firm' resources like enhanced geothermal or advanced nuclear. Key recommendations include reforming interconnection queues, expanding interregional transmission, and implementing performance-based incentives for utilities to prioritize demand-side solutions.

• The U.S. electricity grid can achieve 80% to 90% clean electricity generation using existing technologies, including solar, wind, and batteries, without needing new coal or gas plants.
• Traditional views of 'baseload' power are outdated; a reliable grid requires a diverse portfolio of resources that provide adequacy and flexibility rather than constant 24/7 generation from single plants.
• Fossil fuel and nuclear plants are not perfectly 'firm' and are subject to weather-related outages, as evidenced by Winter Storms Uri and Elliott where gas plants accounted for 58% and 70% of unplanned outages respectively.
• Inverter-based resources (IBRs), such as wind, solar, and batteries, can provide essential reliability services like fast frequency response and can arrest frequency drops more quickly than traditional synchronous generators.
• Demand-side solutions, including energy efficiency and demand response, offer a cost-effective way to manage load growth and peak demand, with a potential for 200 GW of load flexibility in the U.S. by 2030.
• Interconnection queues are a primary barrier to adding clean energy; for example, PJM executed only 6% of interconnection requests between 2018 and 2020, compared to 42% for ERCOT.
• Clean firm energy—carbon-free sources that provide power regardless of weather, such as enhanced geothermal and advanced nuclear—is most cost-effective as a supplement to wind and solar rather than a primary source.
• Rapid load growth from data centers and cryptocurrency mining is straining grid capacity, with data centers potentially consuming up to 9% of U.S. electricity generation by 2030.

APA

Solomon, M., & Baldwin, S. (2025). GRID RELIABILITY IN THE CLEAN ENERGY TRANSITION. Energy Innovation. https://energyinnovation.org/wp-content/uploads/Grid-Reliability-During-the-Clean-Energy-Transition.pdf

Chicago

Solomon, Michelle, and Sara Baldwin. GRID RELIABILITY IN THE CLEAN ENERGY TRANSITION. Energy Innovation, 2025. https://energyinnovation.org/wp-content/uploads/Grid-Reliability-During-the-Clean-Energy-Transition.pdf.

Wikipedia

{{cite report |last1=Solomon |first1=Michelle |last2=Baldwin |first2=Sara |title=GRID RELIABILITY IN THE CLEAN ENERGY TRANSITION |publisher=Energy Innovation |date=February 2025 |url=https://energyinnovation.org/wp-content/uploads/Grid-Reliability-During-the-Clean-Energy-Transition.pdf |access-date=23 October 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{solomon2025grid, author = {Solomon, Michelle and Baldwin, Sara}, title = {{GRID RELIABILITY IN THE CLEAN ENERGY TRANSITION}}, institution = {Energy Innovation}, year = {2025}, month = feb, url = {https://energyinnovation.org/wp-content/uploads/Grid-Reliability-During-the-Clean-Energy-Transition.pdf}, urldate = {2026-10-23}, note = {Indexed by Climate Insights Directory} }