Realta Fusion and MGE begin exploring a 200-MWe Wisconsin fusion plant

The planned Realta Forge will anchor Realta Fusion’s research and development operation in Madison

(Image courtesy of Realta Fusion)

Realta Fusion and Madison Gas and Electric have signed a strategic partnership to explore development of a 200-megawatt electric fusion power plant in Wisconsin. MGE Energy, the utility’s parent company, has made a direct equity investment in Realta as the first phase of the deal, and has also committed equipment, engineering, and technical support, along with assistance on siting, permitting, interconnection, and financing.

MGE’s Realta Fusion investment builds on an existing Madison relationship

The partnership extends ties already in place between the two organisations. Realta is leasing roughly 250,000 square feet of office and industrial space at OM Station, the former Oscar Mayer plant and headquarters site, for its research and development facility, The Realta Forge. The site sits inside MGE’s own service territory.

Wisconsin and the city of Madison separately committed up to $55 million toward that facility earlier in 2026, and Realta has said it expects to create more than 600 jobs there. The power plant partnership announced this week is a distinct agreement from that funding package, but it deepens the same regional cluster of fusion investment around Madison. Realta’s technology base sits behind both projects. The company is closely tied to the Wisconsin HTS Axisymmetric machine, a high-temperature superconducting device hosted at the University of Wisconsin-Madison’s Physical Sciences Laboratory, and is one of eight companies in the US Department of Energy’s Milestone-Based Fusion Development Program.

Permitting and siting work stand between the plant and construction

The current agreement is an exploration of joint development, not a construction commitment. Siting, permitting, and interconnection work still lie ahead before a project of this scale could move toward construction on the Realta Fusion power plant. MGE says it became one of the first US utilities to commit to net-zero carbon electricity, setting that target in 2019, and has described the fusion partnership as consistent with that goal. The companies frame a future plant as a first-of-its-kind investment in carbon-free energy technology for Wisconsin, giving MGE and Realta a live test of how a regulated utility can support a fusion developer through the stages that come well before a plant ever generates power.

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