South Carolina time-of-use hours by utility

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.

tou.tools tracks 11 South Carolina utilities with at least one active TOU rate plan — 42 active schedules in total. The largest by customers served are Dominion Energy South Carolina, Inc, Duke Energy Carolinas, LLC, and South Carolina Public Service Authority. They span investor-owned utilities, electric cooperatives, and state-owned utilities. The full list above is sorted by customers served.

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.

Yes. All 15 residential TOU plans we track in South Carolina split the year into seasons (typically summer and winter) with different period boundaries. Each schedule above lists its exact season dates.

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.

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.