MGE Partnering on First-of-its-Kind Energy Storage Project

A project by our utility subsidiary, Madison Gas and Electric (MGE), and the co-owners of the Columbia Energy Center, Alliant Energy and WEC Energy Group, has been selected for an award for a cooperative agreement with the U.S. Department of Energy's Office of Clean Energy Demonstrations. The award supports the construction of a compressed carbon dioxide (CO2) long-duration energy storage system.
 
The innovative Columbia Energy Storage Project would be the first of its kind in the United States. The proposed 18-megawatt project would be capable of providing at least 10 hours of energy storage.

The added reliability and dispatchability provided by the Columbia Energy Storage Project would help to further enable MGE's ongoing transition to the greater use of renewables. It also would help to manage long-term customer costs because projects like this one enable the partner utilities to store energy to help meet peak demand. 

The Columbia Energy Storage Project would use a closed-loop process either to create electricity or to store energy by transferring an element between its natural fluid or gas states. Through this revolutionary process, designed by Energy Dome, it would deliver electricity to the grid when it is needed or take electricity and store its energy when the grid has excess electricity. 

Also partnering on this project are Shell Global Solutions U.S., Electric Power Research Institute (EPRI), UW-Madison and Madison College. 

The partners expect to submit an application to the Public Service Commission of Wisconsin in the first half of 2024. 

The Columbia Energy Storage Project would be built south of Portage in the Town of Pacific, near the current Columbia Energy Center. This site allows the use of existing electrical infrastructure while the partners work to advance the next generation of sustainable energy.