MGE and WEC Energy Group subsidiaries buy 46.5MW of solar power and battery storage in Wisconsin


The Koshkonong Solar Energy Centre will be operational in late 2025. Image: Invenergy

US energy company Madison Gas and Electric (MGE) will buy output from a solar energy and battery storage centre with a total capacity of 465MW in partnership with WEC Energy Group’s subsidiaries We Energies and Wisconsin Public Service (WPS). 

The Koshkonong Solar Energy Centre, in Wisconsin’s Dane County, is expected to begin operation in late 2025 and will include 300MW solar energy capacity and a 165MW battery storage. MGE will own 30MW of solar energy and 16.5MW of battery storage from Koshkonong. We Energies and WPS will own the remaining 270MW solar capacity and 148.5MW battery storage from the centre. Invenergy LLC is the project developer.

“We are working aggressively to reduce our carbon emissions at least 80% from 2005 levels by the end of this decade and achieve net zero carbon electricity by 2050,” said Jeff Keebler, MGE’s Chairman, president and CEO. 

The Koshkonong Solar Energy Centre is one of three announced investments by MGE in large-scale solar energy and battery storage. Following the deal, MGE will also own a 10% share of the Paris Solar-Battery Park and the Darien Solar Energy Centre, both of which are under construction. 

In 2019 MGE and We Energies filed a joint application with the public service commission of Wisconsin, with We Energies set to own 100MW of the project and MGE with the remaining 50MW. 

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