Wisconsin Power and Light / Alliant (Wisconsin)
Large-load tariff for data centers: what is on file, the terms the filings state, and where each fact comes from. Terms a filing does not state are marked, never guessed.
StatusPending Last reviewed 2026-10-14
Applies atNot confirmed (the filing was not read; Xcel Wisconsin proposed about 100 MW and the We Energies decision set 100 MW)
What the filing saysWisconsin Power and Light / Alliant (Wisconsin) -- Large Load Power Service, pending: PENDING, NOT APPROVED. Three filings follow the We Energies decision (April 24, 2026: 100 MW threshold, 15-year minimum term): Xcel Wisconsin 4220-TE-119 (Very Large General Time of Day service, 100 MW or more, reported 15-year initial term, requested approval by Feb 1, 2027); Madison Gas and Electric 3270-TE-124 (Very Large Customer and Bespoke Resources tariffs); Wisconsin Power and Light 6680-TE-119 (Schedule Cp-3 Large Load Power Service with an electric service agreement). Terms for MGE and WPL were not found. Expect them to resemble the We Energies decision, but that is not confirmed.
Stated terms
This tariff does not yet have terms we can tabulate. The status text above is what the filings and our source state. See the source below.
Source
EEI list, Sept 2026 (docket numbers); newprojectmedia.com coverage of the Xcel filing; Data Center Knowledge on the We Energies decision; Clean Wisconsin press release, May 7, 2026 (Meta / Alliant). Dockets and orders not read.
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Screening information from public filings, not legal or investment advice. Tariffs change; confirm the current terms with the utility and the commission before relying on them.