A rendering of the Columbia Energy Storage Project, a 20-MW/200-MWh energy storage system Alliant Energy and other utilities plan to build near Portage, Wisconsin.
The Columbia Energy Storage Project is the first long-duration energy storage system of its kind to be developed in the United States. The 18-megawatt project is designed to improve grid stability and deliver enough
The Columbia Energy Storage Project is the first long-duration energy storage system of its kind to be developed in the United States. The 18-megawatt project is designed to improve grid
The Public Service Commission of Wisconsin (PSC) has granted final approval for Alliant Energy''s Columbia Energy Storage Project, marking a significant milestone in the
The Columbia Energy Storage Project is the first long-duration energy storage system of its kind to be developed in the United States. The 18-megawatt project is designed to improve grid stability and deliver enough
The Columbia Energy Storage Project in Wisconsin is set to become the first U.S. initiative to deploy a carbon dioxide (CO2) battery system, marking a significant step in the
Alliant Energy filed an application with the state Public Service Commission on Aug. 7 to build a long-duration energy storage system in Columbia County. It would be the first project of its kind in North
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
Madison, Wisconsin – 23 October 2024 – Energy Dome, a leader in long-duration energy storage solutions, announces a landmark advancement in its commercial-scale deployment in the US market through a signed supply
A rendering of the Columbia Energy Storage Project, a 20-MW/200-MWh energy storage system Alliant Energy and other utilities plan to build near Portage, Wisconsin.
(COLUMBIA COUNTY) The Public Service Commission of Wisconsin has approved plans for construction of the Columbia Energy Storage Project. It uses a CO2 battery to bolster
(COLUMBIA COUNTY) The Public Service Commission of Wisconsin has approved plans for construction of the Columbia Energy Storage Project. It uses a CO2 battery to bolster the power grid. Alliant
The Columbia Energy Storage Project is the first long-duration energy storage project of its kind to be developed in the United States. The system''s unique features will boost grid stability and
The Public Service Commission of Wisconsin (PSC) has granted final approval for Alliant Energy''s Columbia Energy Storage Project, marking a significant milestone in the
The Columbia Energy Storage Project is the first long-duration energy storage system of its kind to be developed in the United States. The 18-megawatt project is designed to improve grid
Madison, Wisconsin – 23 October 2024 – Energy Dome, a leader in long-duration energy storage solutions, announces a landmark advancement in its commercial-scale deployment in the US
Utilizing cutting-edge technology designed by Energy Dome, the Columbia Energy Storage Project will boost grid stability, improve resilience and deliver enough electricity to
Alliant Energy filed an application with the state Public Service Commission on Aug. 7 to build a long-duration energy storage system in Columbia County. It would be the first

The Columbia Energy Storage Project will feature Energy Dome’s standard-frame 20MW/200MWh CO2 Battery, powering around 18,000 homes in Wisconsin for 10 hours on a single charge. It aims to set a benchmark for other utilities and energy providers seeking to boost their storage solutions and cut carbon emissions.
Alliant Energy’s revolutionary Columbia Energy Storage Project, using Energy Dome’s safe, reliable CO2 battery, represents a significant advancement in energy storage while bolstering the power grid to benefit Wisconsin customers.
Photo courtesy of Alliant Energy A first of its kind energy storage system coming to Wisconsin took a step forward this month, almost a year after the project was announced. Alliant Energy filed an application with the state Public Service Commission on Aug. 7 to build a long-duration energy storage system in Columbia County.
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.
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