100 MW or greater (Xcel); a dedicated Very Large Customer class (We Energies, Madison Gas and Electric) depends on the utility: We Energies has an approved Very Large Customer (VLC) Tariff and Bespoke Resources Tariff, Madison Gas and Electric has proposed the same pairing, Xcel Energy has proposed a Very Large General Time of Day Service tariff for 100 MW-plus loads, and Wisconsin Power and Light has proposed Schedule Cp-3, a Large Load Power Service Tariff with its own Electric Service Agreement and Customer Reimbursement Agreement.
Also active in Wisconsin: We Energies (WEC Energy Group) is serving a $15 billion, 1,300 MW OpenAI/Oracle/Vantage 'Stargate' campus in Port Washington and a $20 billion, up to 2,600 MW Microsoft investment in Mount Pleasant — among the largest single-state commitments on this list.
Named Projects Already Underway
| Customer | Location | Details |
|---|---|---|
| OpenAI, Oracle, Vantage Data Centers | Port Washington, WI | $15 billion, 1,300 MW data centre campus as part of the 'Stargate' initiative; Vantage will invest $175 million in regional infrastructure |
| Microsoft | Mount Pleasant, WI | $20 billion data centre investment, with power up to 2,600 MW supporting the site and additional regional load |
Figures compiled from the Edison Electric Institute's "Large Load Projects and Tariffs" (September 2026) member-company summary and public regulatory filings. Confirm current tariff terms directly with We Energies / Xcel Energy / Madison Gas and Electric / Wisconsin Power and Light and the relevant state public utility commission before relying on any figure for a capital decision.
Weighing Wisconsin against another state or a Canadian province with a different rate and interconnection picture entirely? Run both sides of the comparison through our licensed AI data centre cost configurator — it applies each jurisdiction's actual power rate, tax treatment and large-load tariff rules to the same seven build configurations.
Model This State on Your Own Site
Every figure above comes from the same power-cost and tariff dataset behind the SCR AI Build Configurator — a licensed, embeddable widget that models seven data centre build configurations against all nine Canadian provinces and all 50 US states plus DC, returning capital expenditure by line item, energy cost, revenue by commercial structure, EBITDA and payback.
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