Duke Energy Carolinas, LLC: power outages per year
In 2025 the average Duke Energy Carolinas, LLC customer was without power for 3.7 hours, more than the South Carolina average of 2.5 h; down from 130.1 h in 2024. The utility served 738,436 customers in South Carolina and ranks #1 of 6 large South Carolina utilities by outage hours.
By year
| Year | Hours (with major events) | Hours (without) | Interruptions | Customers |
|---|---|---|---|---|
| 2025 | 3.7 | 2.3 | 1.3 | 738,436 |
| 2024 | 130.1 | 3.0 | 3.0 | 670,391 |
| 2023 | 4.2 | 3.4 | 1.7 | 656,265 |
| 2022 | 6.2 | 3.1 | 2.0 | 640,693 |
| 2021 | 2.6 | 2.5 | 1.1 | 624,162 |
| 2020 | 13.8 | 3.3 | 1.8 | 627,859 |
"With major events" includes storm days that utilities may exclude from their own reliability targets; it is what customers actually live through. The gap between the two columns shows how much of the year's outage time came from big storms.
Backup power for Duke Energy Carolinas, LLC outages
An average outage here lasted about 2.9 hours in 2025. Size backup for the longest outage you want to ride through, not the average.
Other large utilities in South Carolina
FAQ
How many hours a year are Duke Energy Carolinas, LLC customers without power?
3.7 hours per customer in 2025 including major event days (2.3 h without them), as Duke Energy Carolinas, LLC reported to the U.S. EIA.
How long does a typical Duke Energy Carolinas, LLC outage last?
About 2.9 hours on average in 2025 (total outage minutes divided by the number of interruptions). Storms make single events much longer.
Source: U.S. EIA Form 861, Reliability file, 2020–2025. Data snapshot . Utilities ranked nationwide →