Ameren Corp Announces Big Hollow Energy Center in Missouri: A Step Towards Sustainable Energy Solutions

Ameren Corp has announced plans to build an 800-megawatt natural gas energy center and a 400-megawatt battery storage facility in Jefferson County, Missouri. The project aims to enhance energy reliability, create jobs, and support local economic growth. The integration of battery storage will provide a fast-acting energy backup and Ameren plans to increase its battery storage capacity to 1,800 MW by 2042. The project's success depends on timely regulatory approval and effective cost management.

Ameren Corp has announced plans to build an 800-megawatt (MW) natural gas energy center and a 400-MW battery storage facility in Jefferson County, Missouri. The project, named Big Hollow Energy Center, aims to enhance energy reliability, create jobs, and support local economic growth. The integration of battery storage will provide a fast-acting energy backup, and Ameren plans to increase its battery storage capacity to 1,800 MW by 2042.

The Big Hollow Energy Center is designed to efficiently meet increased energy demands while ensuring grid resiliency. The natural gas portion of the facility will be able to deliver energy on the coldest winter days, hottest summer afternoons, and provide backup during times when renewable energy generation is unavailable. The battery storage facility will be charged during periods of excess energy supply and can be utilized in any weather conditions, providing a quick response to customer energy needs.

The project's success depends on timely regulatory approval and effective cost management. Ameren Missouri, a subsidiary of Ameren Corp, is filing an application with the Missouri Public Service Commission for the project. The energy center is expected to be operational by 2028, serving as a reliable backup source of energy for customers.

The construction of the Big Hollow Energy Center will bring significant investment and jobs to the community. Community leaders in Jefferson County welcome the announcement, recognizing it as a commitment to the future of the region. The project will support the Jefferson R-VII School District and first responders, among other local entities.

Ameren Missouri's mission is to power the quality of life for its customers in central and eastern Missouri. The company's service area covers approximately 60 counties and more than 500 communities, including the greater St. Louis area. The company has been providing electric and gas service for over 100 years.

References:
[1] https://ameren.mediaroom.com/2025-06-27-Ameren-unveils-new-hybrid-energy-center-combining-natural-gas-and-energy-storage-to-supply-reliable-energy-when-Missouri-needs-it-most