South Carolina Public Service Authority
State electric utility · South Carolina · #146 of 3,199 U.S. utilities by customers · EIA utility #17543
South Carolina Public Service Authority is a state electric utility serving 219,897 customers in South Carolina. In 2025 it sold 10,276 gigawatt-hours of electricity for $858.13M in revenue, an average realized rate of 8.35¢ per kWh across all customer classes and 12.91¢ per kWh for residential customers. Its reported service territory covers 3 counties. EIA records its activities as: generation, transmission, buying transmission, distribution, wholesale marketing, bundled.
Customers, sales and rates by customer class (2025)
| Class | Customers | Sales (GWh) | Revenue | Avg realized rate | Share of sales |
|---|---|---|---|---|---|
| Residential | 188,962 | 2,175 | $280.83M | 12.91¢ | |
| Commercial | 30,910 | 1,970 | $213.18M | 10.82¢ | |
| Industrial | 25 | 6,131 | $364.12M | 5.94¢ | |
| Total | 219,897 | 10,276 | $858.13M | 8.35¢ |
Average realized rate = revenue divided by sales as reported on EIA Form 861. It blends fixed charges, demand charges and riders into one per-kWh figure; it is not the utility's tariff rate. Estimated residential bill assumes the average residential customer's actual 2025 usage (959 kWh/month).
Five-year trend
| Year | Customers | Sales (GWh) | Revenue | Residential rate |
|---|---|---|---|---|
| 2021 | 196,789 | 9,189 | $681.17M | 11.32¢ |
| 2022 | 202,263 | 9,921 | $792.18M | 11.33¢ |
| 2023 | 209,311 | 9,924 | $716.36M | 11.38¢ |
| 2024 | 216,494 | 10,087 | $731.65M | 11.38¢ |
| 2025 | 219,897 | 10,276 | $858.13M | 12.91¢ |
Reliability (2025)
Average outage time (SAIDI): 43 minutes per customer per year
Average outages (SAIFI): 0.69 per customer
Average restoration time (CAIDI): 62 minutes
As reported for South Carolina under the IEEE standard, with major event days included where the standard reports them. Lower is better; see the reliability rankings.
Energy supply (2025)
Net generation: 21,397 GWh
Wholesale power purchased: 6,805 GWh
Winter peak demand: 5,415 MW
Energy losses: 4.8% of energy handled
Meters & rooftop solar (2025)
Smart (AMI) meters: 100.0% of 218,260 meters
Customer-sited generation (net metering): 1,954 installations, 13.4 MW of capacity
Counties served
Berkeley, SCGeorgetown, SCHorry, SC
Other large utilities in South Carolina
- Dominion Energy South Carolina, Inc - 824,270 customers, residential 16.41¢
- Berkeley Electric Coop Inc - 138,073 customers, residential 16.32¢
- Horry Electric Coop Inc - 103,949 customers, residential 13.83¢
- Palmetto Electric Coop Inc - 81,863 customers, residential 14.39¢
- Blue Ridge Electric Coop Inc - (SC) - 74,014 customers, residential 19.82¢
- York Electric Coop Inc - 71,541 customers, residential 13.68¢
- Laurens Electric Coop, Inc - 66,192 customers, residential 15.62¢
- Mid-Carolina Electric Coop Inc - 61,196 customers, residential 16.83¢
All South Carolina utilities and rates
Source: U.S. Energy Information Administration, Form EIA-861 2025 (filed by the utility; figures as published). Utility #17543 in the EIA frame.