South Dakota time-of-use hours by utility
Every South Dakota electric utility we track with at least one active time-of-use rate plan, with peak and off-peak hours verified against the published tariff. Periods only — no price values.
Every TOU schedule on this page verified since
Utilities in South Dakota
Sorted by number of customers served in South Dakota.
No utilities match those filters.
Resolve any South Dakota ZIP in one call.
Utility + current period + next transition.
FAQ's
-
What are the typical time-of-use on-peak hours in South Dakota?
Across the 4 residential TOU plans tou.tools tracks in South Dakota, the most common on-peak window is 9 AM – 9 PM (1 plan); others run 12 PM – 8 PM and 10 AM – 10 PM. Every hour outside the on-peak (and any mid-peak) window is billed as off-peak. Exact boundaries vary by utility and plan — see each utility's schedule above.
-
Which electric utilities in South Dakota offer time-of-use rate plans?
tou.tools tracks 6 South Dakota utilities with at least one active TOU rate plan — 17 active schedules in total. The largest by customers served are Xcel Energy, Black Hills Power, Inc., and NorthWestern Energy. They span investor-owned utilities. The full list above is sorted by customers served.
-
Do South Dakota time-of-use peak hours apply on weekends?
On the residential TOU plans we track in South Dakota, on-peak hours apply on weekdays only — weekends are off-peak across all 4 plans. Many tariffs also treat observed holidays as off-peak; the Days column in each schedule above shows the exact rule.
-
Do South Dakota time-of-use hours change by season?
Some do. Of the 4 residential TOU plans we track in South Dakota, 1 shift their period boundaries between seasons (typically summer and winter), while 3 keep the same hours year-round. Each schedule above lists its exact season dates.
-
How do I find which South Dakota utility serves a specific address or ZIP code?
tou.tools maps 1,954 South Dakota ZIP codes to the utilities that serve them. Because service territories can overlap, a ZIP may return more than one candidate utility; supplying a full street address resolves it to a single utility via a geocoded point-in-territory lookup. The REST API and MCP server both return the matching utility and its current TOU period.