Madison Gas and Electric seeks authorization for first local solar array and battery storage system

Published on May 17, 2024 by Chris Galford

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The Public Service Commission of Wisconsin (PSCW) received a request this week to allow Madison Gas and Electric (MGE) to build its first local solar array and battery storage system in a combined project known as the Sunnyside Solar Energy Center.

In all, the Fitchburg, Wisconsin-based energy center would provide 20 MW of solar generation and 40 MW of battery storage – about four hours’ worth. MGE noted this would be enough carbon-free electricity to power about 6,000 households in the area. However, the battery side of things would only be used when demand is greatest or when renewable resources are insufficient to meet that demand. The facility itself would cover about 125 acres.

“MGE continues on our path toward deep decarbonization to achieve net-zero carbon electricity,” Jeff Keebler, MGE chairman, president and CEO, said. “Carbon is our target, and our carbon reduction goals are aligned with science. Under our commitments, by 2030, MGE expects to deliver electricity with 80% fewer carbon emissions to every MGE electric customer. Similarly, by 2050, we expect to deliver net-zero carbon electricity to every MGE electric customer. We’re decarbonizing our grid cost-effectively for the benefit of all customers.”

If authorized, EDF Renewables would lead project development, with construction to begin in 2025. If all goes as planned, MGE signaled it could be in operation by late 2026.

The request came as MGE reported adding 65 MW of wind and solar to its energy supply mix over the last year, and plans to add more than 50 MW of additional solar generation by the end of the year.