Energy storage capacity is experiencing rapid growth across the United States, with utilities, developers, and manufacturers racing to expand infrastructure despite regulatory and grid connection challenges. Market analysis firm Wood Mackenzie projects that US storage capacity will nearly quadruple between now and 2031, reaching 200 gigawatts of cumulative installed capacity. Storage capacity additions achieved record levels earlier this year, with 3.3 gigawatts added in the first quarter alone, driven primarily by solar and wind integration projects.
The sector’s expansion reflects strong investment momentum, particularly following new foreign entity of concern regulations established through last year’s tax legislation. These restrictions have prompted developers with mature project pipelines to accelerate timelines and secure agreements with domestic battery energy storage manufacturers. South Korean startup DeltaX exemplifies this trend, announcing plans to establish a $141 million manufacturing facility in Georgia. The facility will serve as the company’s North American hub, producing battery storage systems for utility-scale projects and data centers.
However, significant infrastructure bottlenecks threaten to slow deployment. According to research by the US Department of Energy’s Lawrence Berkeley National Laboratory, approximately 750 gigawatts of energy storage projects are currently queued for grid connections, with median wait times of five years as of last year. Grid operators continue grappling with aging transmission infrastructure inadequate for new connections. The lab’s analysis of historical data from 2000 to 2020 found that only 13 percent of requested capacity ultimately came online by the end of last year, while 75 percent of applications were withdrawn entirely.
The interconnection process presents particular challenges for grid reliability. High withdrawal rates persist even after developers sign interconnection agreements, complicating planning efforts. Large electricity consumers such as data centers present additional complications, as these facilities are engineered to automatically disconnect during voltage fluctuations, potentially cascading disruptions across broader grid networks. These technical and logistical constraints underscore the infrastructure modernization requirements necessary to accommodate the nation’s expanding clean energy portfolio.
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