Independent power producer Alliant Energy is developing a battery energy storage system next to a retiring power station to serve a key energy hub in eastern Wisconsin.
Alliant Energy is seeking state regulatory approval to install the 99-MW Edgewater Battery project in Sheboygan. Construction could begin by 2024 and would go into commercial operation once the coal-fired Edgewater Generating Station is closed a year later.
“This battery system represents the next phase of energy generation that will enable more sustainable growth and greater resiliency,” said David de Leon, president of Alliant Energy’s Wisconsin energy company. “The Edgewater Battery Project is a smart investment that strengthens our generation portfolio while leveraging the historic energy investments in the Sheboygan community.”
Nearby, Alliant is developing plans for another 175 MW of BESS capacity at sites in Grant and Wood counties. The utility also has put together a $3 million battery-based microgrid to support the Village of Boaz in Wisconsin.
The Boaz microgrid can be islanded allowing the 250-kW battery storage to provide electricity for up to eight hours in the community.
The battery storage initially will be energized by the main Alliant grid. In the future, solar power capacity could be added.
Late last year, the Iowa city of Grinnell announced intentions to partner with Alliant on developing a 1.59-MW solar energy farm to support the municipal grid.
Alliant Energy will design, construct, own, operate and maintain the solar project. The City of Grinnell will receive annual fixed lease payments over the next 20 years.
The utility also has developed a battery storage project in Decorah, Iowa.