INSIGHTSSERIES
Power & Utilities | Energy Storage
November 10, 2025
Utilities’ Long-Term Resource Plans Reflect Growing Role of Energy Storage
From managing load growth to accommodating renewables, integrated resource plans emphasize the role of energy storage as a critical reliability and grid-flexibility asset.
Long-term resource plans of electric utilities across the U.S. reflect the growing role of energy storage in integrated resource planning, with multi-gigawatt portfolios designed to support…Read the full report
Key Takeaways
- Duke Energy’s 2025 Carolinas Resource Plan outlines a long-term strategy that expands battery storage capacity to 5.6 GW by 2034, supporting grid reliability and clean energy integration amid growing electricity demand.
- AES Indiana’s resource plan proposes an initial 40 MW of battery storage by 2032, scalable to approximately 820 MW if a large-load customer contracts.
- PacifiCorp’s long-term plan, covering six western states, envisions 7.5 GW of energy storage by 2045 including 100-hour iron-air batteries for long-duration storage.
