Southwestern Public Service (Xcel, SPP)
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.
StatusApproved Last reviewed 2026-10-03
Applies at10 MW at 69 kV or below, or 50 MW above 69 kV (SPP High Impact Large Load)
What the filing saysLoads over those thresholds follow SPP's High Impact Large Load process, targeting a 90-day study window. Smaller loads go through SPS directly.
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
SPP High Impact Large Load (HILL) integration materials; FERC order approving the process
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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.