Plans to construct a first of its kind long-duration energy storage system of its kind in the United States are advancing following approval from the Public Service Commission of Wisconsin.
Alliant Energy’s Columbia Energy Storage Project will use Energy Dome’s CO2 battery. The closed-loop system will take energy from the grid and convert CO2 gas into a compressed liquid form for long-term storage. Then, when the stored energy is needed, the system converts the liquid CO2 back to a gas, which powers a turbine to create electricity.
Development of the Columbia Energy Storage Project is led by Alliant Energy in partnership with Wisconsin Public Service Corporation, a subsidiary of WEC Energy Group, and Madison Gas and Electric.
Utilizing cutting-edge technology designed by Energy Dome, the Columbia Energy Storage Project will boost grid stability, improve resilience and deliver enough electricity to power approximately 18,000 Wisconsin homes for 10 hours on a single charge, Alliant Energy said.
The energy storage system will be built south of Portage, Wisconsin in the town of Pacific and near Alliant Energy’s existing Columbia Energy Center.
Construction is expected to begin in 2026 and be completed by the end of 2027.
