Aerial view of Deer Run battery facility

Alliant Energy supercharges battery deployment

Accelerated development of energy storage capacity to deliver increased value, efficiency and reliability to Alliant Energy’s customers in Wisconsin

MADISON, Wis. (September 30, 2022) – With major advances in the transition to creating safe, clean renewable energy generation, Alliant Energy announces plans to add 175 megawatts (MW) of battery storage in Wisconsin. The plan, filed today (Sept. 30, 2022) with the Public Service Commission of Wisconsin, calls for battery storage facilities to be developed in Grant and Wood counties, alongside two previously approved Alliant Energy solar arrays. 
“Just like the batteries you’d find in a cell phone, laptop or car, the storage systems we’re developing can deliver energy to power our lives when we need it,” said David de Leon, president of Alliant Energy’s Wisconsin energy company. “As we transition to cleaner, more cost-effective renewable energy, the added capacity and unique capabilities of these energy storage solutions will strengthen our generation portfolio, improve reliability and help meet customer needs. It’s just one more way we’re delivering on our purpose-driven strategy.”
The Grant County battery project (100 MW/400 MWh), located at the Grant County Solar site in the town of Potosi, could store enough energy to power over 100,000 Wisconsin homes for four hours. The Wood County battery project (75 MW/300 MWh), located at the Wood County Solar site in the town of Saratoga, could store enough energy to power over 80,000 Wisconsin homes for four hours. Alliant Energy has worked closely with these communities over the past several years to maximize the economic and environmental benefits of the company’s renewable energy investments.
“Our mission is to deliver the energy solutions and exceptional service that customers and communities count on – safely, efficiently and responsibly,” said de Leon. “As a leader in renewable energy generation, Alliant Energy is well-positioned to accelerate the development of this energy storage capacity in Wisconsin. For customers, this means greater reliability and long-term affordability as we transition toward a cleaner energy future.”
Alliant Energy is following the plan outlined in its Clean Energy Blueprint to bring clean, reliable and affordable energy to customers for years to come. The plan includes constructing nearly 1,100 MW of utility-scale solar energy at 12 sites across Wisconsin. The added flexibility created by battery energy storage solutions will diversify and complement Alliant Energy’s generation portfolio while increasing customer access to safe, reliable energy even when the sun isn’t shining and the wind isn’t blowing.
Pending PSCW approval, Alliant Energy plans to begin construction on these battery projects in 2023 and expects them to be in service by Fall 2025. For more information on Alliant Energy’s battery projects, visit 


This press release includes forward-looking statements. These statements can be identified because they include words such as “plan,” “will,” “targeted,” or other words or expressions of similar import. Similarly, statements that describe planned battery storage facilities, our clean energy vision, transitioning our energy resources, and other plans and strategies are forward-looking statements. These forward-looking statements are subject to risks and uncertainties that could cause actual results to differ materially from those expressed in, or implied by, the statements. Actual results could be materially affected by the following factors, among others: the inability to obtain regulatory approvals or necessary permits in a timely manner; state regulatory actions that delay or reject the proposed plans, or that include terms that make the plans uneconomical, including rate recovery levels and returns on equity; the inability to obtain necessary equipment and labor in a timely manner; the ability to complete construction of storage projects by planned in-service dates and within the cost targets set by regulators due to cost increases of and access to materials, real estate, equipment and commodities including due to inflation, tariffs, duties or other assessments, labor issues or supply shortages, the ability to successfully resolve warranty issues or contract disputes, the ability to achieve the expected level of tax benefits based on tax guidelines and project costs, and the ability to efficiently utilize the storage project tax benefits for the benefit of customers; work stoppages; adverse weather conditions; unforeseen engineering or technology issues; failure of equipment and technology to perform as expected; political conditions in Alliant Energy’s service territories; changes to Alliant Energy’s access to capital markets; adverse impacts resulting from the COVID-19 pandemic and responses to the pandemic; current or future litigation, regulatory investigations, proceedings or inquiries; and economic conditions in Alliant Energy’s service territory. These factors should be considered when evaluating the forward-looking statements and undue reliance should not be placed on such statements. The forward-looking statements included herein are made as of the date hereof and Alliant Energy and Wisconsin Power and Light Company undertake no obligation to update publicly such statements to reflect subsequent events or circumstances.

Alliant Energy Corporation (NASDAQ: LNT) provides regulated energy service to 1 million electric and 425,000 natural gas customers across Iowa and Wisconsin. Alliant Energy's mission is to deliver energy solutions and exceptional service customers and communities count on – safely, efficiently and responsibly. Interstate Power and Light Company (IPL) and Wisconsin Power and Light Company (WPL) are Alliant Energy's two public energy companies. Alliant Energy is a component of Bloomberg’s Gender-Equality Index and the S&P 500. For more information, visit and follow Alliant Energy on LinkedIn, FacebookInstagram and X.

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