South Carolina time-of-use hours by utility

Every South Carolina 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.

11Utilities covered
44Active TOU plans
1,173ZIP codes covered

Every TOU schedule on this page verified since

Utilities in South Carolina

Sorted by number of customers served in South Carolina.

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FAQ's

  1. What are the typical time-of-use on-peak hours in South Carolina?

    Across the 15 residential TOU plans tou.tools tracks in South Carolina, the most common on-peak window is 6 AM – 9 AM (13 plans); others run 6 PM – 9 PM and 3 PM – 6 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.

  2. Which electric utilities in South Carolina offer time-of-use rate plans?

    tou.tools tracks 11 South Carolina utilities with at least one active TOU rate plan — 44 active schedules in total. The largest by customers served are Dominion Energy South Carolina, Duke Energy Carolinas, and Santee Cooper. They span investor-owned utilities, electric cooperatives, and state-owned utilities. The full list above is sorted by customers served.

  3. Do South Carolina time-of-use peak hours apply on weekends?

    It depends on the plan. Of the 15 residential TOU plans we track in South Carolina, 5 apply on-peak periods every day including weekends, while 10 restrict on-peak to weekdays and treat weekends as off-peak. Many tariffs also treat observed holidays as off-peak; the Days column in each schedule above shows the exact rule.

  4. Do South Carolina time-of-use hours change by season?

    Some do. Of the 16 residential TOU plans we track in South Carolina, 15 shift their period boundaries between seasons (typically summer and winter), while 1 keep the same hours year-round. Each schedule above lists its exact season dates.

  5. When is the cheapest time to charge an EV in South Carolina?

    tou.tools tracks 6 EV-specific rate plans in South Carolina (EVCS, RATE-CODE-6, RATE-CODE-8, REV-25, RG-25-EVO, and SC-R-TOU-EV). On EV time-of-use plans the lowest-cost window is generally the overnight super-off-peak or off-peak period; charging then avoids the on-peak window. See the EV plan schedules for the exact hours.

  6. How do I find which South Carolina utility serves a specific address or ZIP code?

    tou.tools maps 1,173 South Carolina 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.