Alliant Energy gets green light for 175MW of US storage

The Public Service Commission of Wisconsin (PSCW) has approved two Alliant Energy battery energy storage projects totalling 175MW. 

The approval clears the way for construction to begin on the 100-MW Grant County Battery Project and 75-MW Wood County Battery Project. 

The projects will be located alongside the company’s Grant County and Wood County solar sites. 

Alliant Energy expects to begin construction on both battery projects in early 2024. The Wood County project in the town of Saratoga is expected to be operational by the end of 2024 while the Grant County project in the town of Potosi is expected to be operational by mid-2025. They will have the capacity to power over 80,000 homes for four hours and 100,000 homes for four hours, respectively. 

Alliant Energy selected software technology provider FlexGen to provide the energy management system and battery energy storage equipment. David de Leon, president of Alliant Energy’s Wisconsin energy company, said: “These projects are another step toward achieving our clean energy goals while enabling a more resilient and cost-effective energy future. We are excited to break ground on these innovative battery projects and look forward to the benefits and enhanced value these systems will deliver to our customers.”

Kelcy Pegler, CEO of FlexGen, said: “Alliant Energy is one of the country’s most forward-looking and innovative utilities when it comes to energy storage and system reliability. These battery projects represent an incredibly important step toward creating a more intelligent and resilient grid. Battery energy storage resources are the key to the future of our infrastructure, and FlexGen is proud to deliver industry-leading services and value to our partner Alliant Energy and the customers it serves.”