More than 9,500 solar panels now generate clean energy at Alliant Energy’s new Marshalltown Solar Garden. This pilot project combines solar power and a battery to generate, store and deliver electricity to customers.
The Marshalltown Solar Garden sits next to Alliant Energy’s Marshalltown Generating Station.
“This solar-battery combination allows us to provide our customers with solar power during the day and night,” Terry Kouba, president of Alliant Energy Iowa, stated in a release. “The solar field adds power to the grid when the sun is shining and then our battery allows our customers to continue using this renewable energy resource in the evening when the sun isn’t shining.”
The 2.55-MW AC solar system in Marshalltown can power nearly 400 homes. With full sun, the solar panels can also fully charge the 548kWh battery within two hours. When discharged, the battery can power nearly 200 homes for two hours. The solar garden became operational in mid-February and the battery was just put into service this week.
The company has three battery sites in Iowa, and each is being used to pilot different combinations of solar power and energy storage technology. The Marshalltown battery is the company’s first battery that’s directly connected to a utility-sized solar field.
Alliant Energy also has two Dubuque solar gardens, which have been generating clean energy for customers since 2017.
Image caption: Terry Kouba, President Alliant Energy – Iowa, Alliant Energy Marshalltown employees and community members join to cut the ribbon at the Marshalltown Solar Garden and Battery Project.