US Utility-Scale Energy Storage Installation Tripled in 2021

The American Clean Power Association recently released its latest yearly figures for utility-scale battery energy storage system installations in the United States. The figures show a significant increase in installations, highlighting that last year, this number increased by more than 195% to 2.6GW.

However, overall clean power installations also dropped by 3%, with installations in the fourth quarter in 2021 also declining by more than 30%. The utility-scale battery energy storage system capacity also quadrupled over the course of last year, with the trade body finding that the energy made up 2% of the nation’s total clean power capacity.

More than 1GW of large-scale battery energy storage system began operations in the last quarter of 2021, making this the first time this landmark has been achieved in a single three-month period.

Overall, the data released also shows that 11.3GW of capacity that was expected to come online last year had their dates of completion postponed as some projects battled increasing costs, trade barriers and supply chain constraints, among other challenges. Wind was the most affected by this, with installations dropping 25%. On the other hand, solar installations grew by almost 20%.

The trade body added that constraints in the supply chain delayed project timelines while slow and long interconnection queues slowed progress, noting that of the 187 projects in the 12.5GW battery storage pipeline, 139 are paired with a renewable source of energy while the remaining are standalone.

Total operating capacity for hybrid systems also increased by more than twice last year, reaching 8.7GW with the data showing that the majority of this is storage paired with a renewable source of energy.

The 131% capacity growth for hybrid observed in 2021 was extraordinary especially if one considers that it had a compound annual growth rate of only 11% in 2019/2020 and 26% between 2009 and 2020.

States leading in clean power capacity include California, Iowa and Texas. Iowa has 12.3W while California has 22.8GW and Texas has roughly 45GW. The clean power capacity pipeline for the states of California and Texas are 3.4GW and 11.5GW respectively.

The proportion of the battery energy storage systems in the Texas pipeline is 10% while storage in California makes up about 40% of the state’s pipeline. California’s 5.2GW storage pipeline is still higher than those of Hawaii, Arizona and Nevada, which follow with 0.6GW, 1.2GW and 1.6GW respectively. With regard to capacity, land-based wind still occupies the bulk while solar is at 30%.

This surge in energy storage installations is a pointer to what lies ahead for companies such as StorEn Technologies Inc. that have specialized in developing solutions in this space. Demand will keep growing as more utility-scale operators switch to green forms of energy.

NOTE TO INVESTORS: The latest news and updates relating to StorEn Technologies Inc. are available in the company’s newsroom at

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