Alliant Energy is building a battery storage unit in Portage that will be able to supply power in short stretches to 5,000 homes.

Battery storage units store energy from the sun as alternating current power for later use. The new 5-megawatt energy storage system in Portage will double Alliant Energy’s Midwest battery storage capacity.

Alliant, like other utilities, has been piloting advances in battery storage technology. The Portage unit will be Alliant’s fourth in the state and eighth in the Midwest.

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