Wisconsin electrical utility We Energies has started construction on three renewable energy and battery storage projects in Wisconsin, with around half of their combined capacity earmarked to supply a major AI data center campus in Port Washington.

The projects comprise a 150MW solar and 50MWh battery storage project in Rock County, a 110MW wind farm spanning Iowa and Grant counties, and a 75MW battery energy storage facility in Walworth County. The projects are expected to be completed by the end of 2027.

Chicago-based Invenergy will develop the facilities before transferring ownership to Wisconsin utilities. We Energies will hold the majority ownership stake, with the remainder shared between Madison Gas & Electric and Wisconsin Public Service.

Approximately 50 percent of the generated capacity of each of the projects has been allocated to the under-development $15 billion Port Washington campus being developed by Vantage Data Centers, Oracle, and OpenAI.

First announced in October, Vantage is developing the 672-acre campus for OpenAI and Oracle as part of the AI firm’s Stargate initiative.

The site will total 902MW and 2.5 million sq ft (232,255 sqm) across four buildings at full build-out. Set to go live in 2028, the campus will use closed-loop liquid cooling.

According to We Energies, the utility currently has more than 3GW of solar and wind capacity and around 600MW of battery storage either operating, under construction, or awaiting regulatory approval.

The utility recently approved a large load tariff for customers such as hyperscale data centers, which will require them to fund the dedicated generation and transmission infrastructure built specifically to serve them, rather than passing those costs on to other utility customers. The tariff was approved by the Wisconsin Public Service Commission earlier this year. Vantage previously committed to underwrite 100 percent of the power infrastructure investment with a dedicated electricity rate.