Battery utilization remains low in U.S. energy storage projects

The photovoltaic energy storage market in the United States is currently maturing, and the operating data of energy storage projects in recent years shows the efficiency and utilization of battery projects across the United States.

While stationary energy storage has expanded into broader electricity service, the average battery utilization rate of the 183 battery storage projects in the U.S. last year was only 11.5%.

California is one of the most mature markets for battery storage projects in the world, and utilization rates in the state are expected to rise over time.

Battery utilization in the state's energy storage market averages 18.1% in 2022, but varies widely between projects, ranging from 0.3% to 34.5%. It also reflects the state's diverse business model and the transition of batteries from niche service to broader electricity market service.