Energy storage

Advancing our renewable energy future


As the electric grid continues evolving, we are leading the way with innovative solutions that integrate emerging technologies and optimize energy resources such as wind, solar, hydro and traditional generation systems. These efforts improve reliability and efficiency.

Energy storage infrastructure is a newer part of our strategy and a key to accelerating our transition to renewable energy. With major transformations underway, battery storage helps us meet demand, reduces the need for traditional power grid updates and ensures we are prepared in the event of outages and severe weather.

We currently have several battery storage pilot units in operation. We are also evaluating potential new development opportunities to harness more locally generated power and accelerate our transition to renewable energy. Find additional information about our plans in our Clean Energy Blueprint.

Battery storage systems


Battery storage units make the most of our renewable energy assets and increase efficiency and reliability. When demand is low, we store excess electricity that’s generated by wind and solar arrays, and then release it to the grid when needed.

Energy storage helps us better meet customer needs and helps us avoid costly infrastructure upgrades.

Video: Battery storage explained

Columbia Energy Storage Project


We’re teaming up with WEC Energy Group, Madison Gas and Electric, UW-Madison, Madison College, Shell Global Solutions U.S. and the Electric Power Research Institute to construct the Columbia Energy Storage Project – one of the most sustainable, advanced energy storage systems in the country.

The 200-megawatt-hour project will be the first of its kind in the United States and represents a significant advancement toward a more reliable, resilient and cost-effective energy future.

We’ll build the facility near the current Columbia Energy Center. Pending approval by the Public Service Commission of Wisconsin, we expect construction to begin in 2026 and be finished by the end of 2027.

Alliant Energy energy storage facilities


Click on the map below to learn more about each of our energy storage facilities.

Energy storage FAQ
Battery background
Your questions, answered
Energy storage systems meet various needs
solar battery in Marshalltown, Iowa
Multiple benefits
Myths about battery energy storage systems
aerial view of a battery energy storage system
Get the facts