Skip to content
Tariff data · 2026-08-26
South Carolina Public Service Authority · SC

RESIDENTIAL TIME-OF-USE RATE SCHEDULE RT-25

When does peak hit on South Carolina Public Service Authority’s RESIDENTIAL TIME-OF-USE RATE SCHEDULE RT-25? Peak hits 6am–9am in Nov–Mar; 3pm–6pm in Apr–Oct — every day.

  • peak37.44¢
  • off-peak11.56¢
Weekdays
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Weekends
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

What does RESIDENTIAL TIME-OF-USE RATE SCHEDULE RT-25 cost a year?

HouseholdUsesPer yearWorks out to
Apartment

One or two people, no central air, no electric heat

4,866 kWh$99720.5¢ / kWh
Family home

Three or four people with central air conditioning

9,453 kWh$1,76218.6¢ / kWh
Home with an EV

Same house, plus an electric car charging overnight

13,103 kWh$2,18416.7¢ / kWh

Estimates, not quotes. We run three made-up but realistic households through this tariff hour by hour for a full year — including the way air conditioning loads the afternoon and an EV loads the small hours. Your own bill depends on when you actually use electricity, which is exactly the thing a per-kWh number hides.

What you actually pay

PeriodRateApplies when
peak37.44¢3pm–6pm, April–October
peak37.44¢6am–9am, November–March
off-peak11.56¢9am–6am, November–March; 6pm–3pm, April–October

Plus a fixed charge of $20 per month.

Should you be on RESIDENTIAL TIME-OF-USE RATE SCHEDULE RT-25?

This is a time-of-use plan, which means the clock decides your bill as much as the meter does. At the worst hour you pay 37.4¢ a kWh; at the best hour, 11.6¢ — 3.2× apart for identical electricity.

That gap is worth real money only if you can move load into it. Every kilowatt-hour a day you shift from 6am to midnight is about $94 a year. A dishwasher run is roughly 1.5 kWh; an EV commute charge is 8 to 12. If your day is fixed — you are home in the evening and the air conditioner runs when it runs — a plan like this costs you more, not less.

Before a single kilowatt-hour moves, this plan charges $240 a year in fixed fees. On the apartment above that is 24% of the whole bill; on the house with a car charging in it, 11%. Fixed charges are invisible in a cents-per-kWh comparison and they punish small users hardest — if you use very little electricity, the headline rate is the least important number on this page.

Expect the bill to move with the calendar. The same family home costs about $207 in July and $111 in February — a $96 spread driven by heating and cooling far more than by anything you chose. Budget against the July figure, not the average, and a summer bill stops being a surprise.

If this is new to you

Where this comes from

Effective
2025-04-01

the date this tariff took effect

Covers
delivery + supply

우편번호 매핑에서 이 지역 서비스 종류가 Bundled — 배달과 공급을 함께 판다

Enrollment
open to new customers

Tariff document: https://www.santeecooper.com/Rates/_pdfs/Residential/RT-25.pdf