Wisconsin utility Alliant Energy has announced plans to deploy two battery storage projects totaling 175MW/700MWh in the state.
Alliant Energy submitted the plan to the Wisconsin Public Service Commission for approval on Sept. 30, and plans to develop battery storage systems in Grant and Wood counties in the state.
The two battery-storage projects the company plans to deploy will both last four hours, and Wisconsin appears to be following in California's footsteps. California is the most developed energy storage market in the United States, and the duration of widely deployed energy storage systems is mostly 4 hours.
The battery storage project planned to be deployed in Grant County is 100MW/400MWh, while the battery storage project in Wood County is 75MW/300MW. Both battery storage projects will be deployed in conjunction with solar power generation facilities.
Pending approval from the Wisconsin Public Service Commission, Alliant Energy plans to begin construction of the battery storage project in 2023 and have it online by fall 2025.
Documents on the Wisconsin Public Service Commission's website regarding the battery storage projects in Wood and Grant counties indicate that energy storage system integrator Flexgen will provide battery storage solutions to Alliant Energy, and that it will be integrated into its in-house energy management system ( The deployment locations of these two projects have been marked on the site map of EMS).
Alliant Energy has developed a clean energy blueprint plan to build 1,100MW of utility-scale solar power facilities in Wisconsin. The company said the battery storage system would provide additional flexibility and smooth out intermittent power generation.
David de Leon, president of Alliant Energy's Wisconsin subsidiary, which also operates in Iowa, said: "As we transition to cleaner, more affordable renewable energy, the added capacity and uniqueness of these energy storage solutions The capabilities will strengthen our power generation portfolio, improve reliability and help meet customer needs."
In August, the company brought a smaller 5MW battery storage system online in Iowa.
In 2022, several large-scale solar-plus-storage projects will be operational in the Midwestern states of the United States. In March, investor-owned utilities MGE and WEC Energy received regulatory approval to procure power from a solar-plus-storage park in Kenosha County, including a 200MW solar power plant, according to industry media reports. facilities and a 110MW battery energy storage system. And in April, Invenergy announced the deployment of a 300MW solar farm and 165MW battery storage system.
According to the forecast of research firm IHS Markit, as the United States gradually phase out coal-fired power plants, the Midwest region of the United States will become a huge potential energy storage market.