Energy storage

Advancing our clean energy future


As the electric grid continues to evolve, Alliant Energy is leading the way with new and innovative solutions. We are working to integrate emerging technologies and optimize energy resources such as wind and solar power, battery storage and traditional generation systems. These efforts will benefit our customers with improved energy reliability, efficiency and cost-effectiveness.

The expansion of energy storage infrastructure is key to accelerating the transition to cleaner and more sustainable renewable energy. With major transformations underway, we’re working rapidly to balance energy demands, reduce the need for traditional power grid updates and increase security in the event of an outage or severe weather.

Header image: Battery system in Wellman, Iowa

Photo caption: Battery system in Decorah, Iowa

boaz microgrid diagram

Boaz reliability microgrid

This microgrid pilot project – the first of its kind in Wisconsin – will create a small-scale power grid with islanding capability, meaning it can be disconnected from the traditional grid to operate independently in the event of a power outage or service disruption.

When disconnected from the central grid, microgrids serve customers in a defined area with power from one or more distributed energy resources such as battery, wind, solar or a combination thereof to improve reliability.

Project development of the Boaz microgrid is underway and we expect system completion in late 2022.

Alliant Energy announces development plans for microgrid in Richland County (Alliant Energy news release, Oct. 28, 2021)

Battery storage systems


Battery storage units maximize the value of our renewable energy assets. This storage capacity allows us to capture excess electricity that is generated when the wind is blowing strongest and the sun is shining brightest. When the sun goes down or energy demands increase, we can release this stored battery power onto the grid and deliver clean, reliable energy to customers when its needed.

These energy storage solutions improve reliability and better meet customer needs – all while reducing reliance on fossil fuels and avoiding costly energy grid rebuilds.

We currently have several battery storage pilot units in operation and continue to evaluate potential development opportunities to harness more locally grown power and accelerate our transition to renewable energy. Additional information about our plans to advance sustainable energy solutions can be found in our Clean Energy Blueprint.

Photo caption: Battery system in Portage, Wisconsin

Map: Battery systems in Alliant Energy's service territory