A battery energy storage unit at Alliant Energy’s microgrid system in Boaz, WI.

Lansing battery energy storage system

The Lansing battery energy storage system (BESS) is at the site of the former Lansing coal facility. The coal facility, which operated for more than 70 years, retired in 2023. Our goal is to continue to use the site to support reliable energy for our customers and the community.

What is a BESS?

A battery energy storage system is a large collection of batteries connected directly to the power grid. These facilities charge the batteries at night when demand is typically low and release energy during the day when demand is high. This helps us meet customer needs, reduces the need for traditional grid upgrades and strengthens reliability during outages and severe weather.

Learn more about energy storage

Project timeline

 Spring 2027

  • We bring the site online and put it into operation.

Fall 2026

  • We install batteries and connect the project to the power grid.

Summer 2026

  • Batteries and the inverter arrive on-site.

Spring 2026

  • Site preparation includes removing old soil containing coal ash and bringing in gravel for leveling and drainage.
  • We also pour concrete pads to support batteries.
 

 

employee standing next to energy storage equipment

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