Wisconsin Adds Renewable Energy Storage

Alliant Energy Doubles Battery Capacity

The New 5-MW Energy Storage System In Portage, Wisconsin

A new 5-MW energy storage system in Portage, Wisconsin, doubles Alliant Energy’s Midwest battery storage capacity. Completion of the battery system marks a significant step in Alliant Energy’s development of storage capacity to complement its growing renewable energy portfolio.


“Advances in battery storage technology are helping to maximize the benefits of renewable energy development for our customers and the communities we serve,” said David de Leon, president of Alliant Energy. “Battery storage will ensure we continue to deliver safe, clean, and reliable energy to our customers as we grow our renewable energy portfolio.”


The site increases the total power rating of Alliant Energy’s energy storage systems across its service territory from roughly 3.5 to 8.5 MW. In addition to serving as an energy storage resource, Alliant Energy plans to capitalize on research and development opportunities by closely studying the system’s performance, design features, and grid integration.


“As technologies improve, we are excited about the potential for battery storage solutions to deliver enhanced efficiency, reliability, and affordability for our electric customers,” added de Leon. “These investments in energy solutions are transforming our energy grid and creating new opportunities for the customers and communities we serve.”