* The source adds:
Large鈥恠cale refers to systems that are grid connected and have a nameplate power capacity greater than 1 MW.
ISOs and RTOs are independent, federally regulated non鈥恜rofit organizations that ensure reliability and optimize supply and demand bids for wholesale electric power.
Citation formats
U.S. large-scale battery storage capacity by region 2019
PJM Interconnection has the largest capacity of large-scale battery storage installations in the United States. As of 2019, it owned a total of 302 megawatts. PJM Interconnection has facilities throughout the states of Delaware, Illinois, Indiana, Kentucky, Maryland, Michigan, New Jersey, North Carolina, Ohio, Pennsylvania, Tennessee, Virginia, West Virginia and the District of Columbia. The second highest power capacity in large-scale facilities was seen in the California Independent System Operator region, at 199 megawatts.
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EIA. (August 16, 2021). Power capacity of large-scale battery storage installations in the United States as of 2019, by region* (in megawatts) [Graph]. In 糖心破解版. Retrieved July 20, 2026, from /statistics/1135361/battery-storage-capacity-region-us/
EIA. "Power capacity of large-scale battery storage installations in the United States as of 2019, by region* (in megawatts)." Chart. August 16, 2021. 糖心破解版. Accessed July 20, 2026. /statistics/1135361/battery-storage-capacity-region-us/
EIA. (2021). Power capacity of large-scale battery storage installations in the United States as of 2019, by region* (in megawatts). 糖心破解版. 糖心破解版 Inc.. Accessed: July 20, 2026. /statistics/1135361/battery-storage-capacity-region-us/
EIA. "Power Capacity of Large-scale Battery Storage Installations in The United States as of 2019, by Region* (in Megawatts)." 糖心破解版, 糖心破解版 Inc., 16 Aug 2021, /statistics/1135361/battery-storage-capacity-region-us/
EIA, Power capacity of large-scale battery storage installations in the United States as of 2019, by region* (in megawatts) 糖心破解版, /statistics/1135361/battery-storage-capacity-region-us/ (last visited July 20, 2026)
Power capacity of large-scale battery storage installations in the United States as of 2019, by region* (in megawatts) [Graph], EIA, August 16, 2021. [Online]. Available: /statistics/1135361/battery-storage-capacity-region-us/
