IOU · North Carolina · EIA 5416
Duke Energy Carolinas, LLC
IOU · North Carolina · 2.2M customers. According to the U.S. Energy Information Administration's EIA Form 861, reliability for 2023 shows SAIDI 343 minutes/customer.
Reliability verdict
Duke Energy Carolinas, LLC shows near-benchmark chronic reliability in 2023: 197 minutes SAIDI excluding major events across 2.2M customers.
- 343 min
- SAIDI 2023
- 1.61
- SAIFI 2023
- 197 min
- SAIDI ex-MED
- 2.2M
- Customers
Chronic reliability judged on SAIDI excluding major event days when reported (IEEE 1366). Source: EIA Form 861 · August 2026.
Signature read: long interruption minutes vs the 911 utility cohort (>258 min tercile cut).
What long-outage Duke Energy Carolinas, LLC filings show
Duke Energy Carolinas, LLC is an investor-owned utility operating in North Carolina under EIA identifier 5416. It reports service to approximately 2,186,570 customer accounts and generated about $5.39 billion in annual electric revenue, with a service footprint spanning 500 ZIP codes. Because it is investor-owned, the state public utility commission oversees its rate cases and reliability performance rather than a local board.
In 2023, the average Duke Energy Carolinas, LLC customer experienced 342.7 minutes of power interruptions, the industry-standard SAIDI metric (System Average Interruption Duration Index). That falls inside the typical 120–180 minute national benchmark, in line with what most U.S. distribution utilities report. SAIFI, the average number of outage events per customer, was 1.61 for the same period, so customers statistically faced roughly 2 distinct interruptions that year. Strip out major event days (hurricanes, ice storms) and SAIDI falls to 197.1 minutes; the difference from the headline 342.7 shows how much of the outage total came from weather rather than everyday grid issues.
Duke Energy Carolinas, LLC has 4 years of continuous EIA reporting on file (2020–2023), enough to read a real trend rather than a single-year snapshot. SAIDI has improved from 520.4 to 342.7 minutes over that window, a meaningful direction for prospective customers and regulators watching capital investment outcomes.
Based on this utility's own EIA Form 861 reliability record -- baseline (major-event- excluded) outage duration, total outage duration, and outage frequency -- each benchmarked against every reporting utility nationwide. Not a measure of electricity rates or customer service, which this portal does not track.
343 minutes per customer per year
Minutes without power per year (2023)
SAIDI by year (2020-2023)
Minutes per customer-year · EIA Form 861
Year-by-year SAIDI for Duke Energy Carolinas, LLC from the same EIA filings as the table below. Lower is better; major-event years can spike the headline figure.
Duke Energy Carolinas, LLC SAIDI trend
Duke Energy Carolinas, LLC vs the nationwide SAIDI distribution
Where this utility's headline SAIDI sits among every EIA Form 861 utility with a reported figure
343 Around the middle fewer outage minutes than 26% of 911 utilities
Utilities nationwide, banded by latest reported SAIDI (minutes)
Each bar is a band; taller bars hold more utilities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source U.S. EIA Form 861 reliability filings · August 2026
Price vs. reliability
Where Duke Energy Carolinas, LLC sits on price vs. reliability
Among the 781 U.S. utilities large enough to report both revenue per customer and a recent outage record, Duke Energy Carolinas, LLC charges more per customer than 45% of them, and is more reliable (lower SAIDI) than 29% of them, placing it in the quadrant where it pays less and is less reliable. Revenue per customer and outage minutes are independent figures: paying more does not guarantee fewer outages.
Revenue per customer: $2,467/year · Latest SAIDI: 342.7 minutes/year.
SAIDI 2023 breakdown: 342.7 minutes
Reliability Trend (2020–2023)
| Year | SAIDI (min) | SAIDI nMED | SAIFI | Customers |
|---|---|---|---|---|
| 2020 | 520.4 | 175.0 | 1.630 | 2,112,006 |
| 2021 | 259.0 | 153.6 | 1.252 | 2,088,852 |
| 2022 | 474.4 | 181.7 | 1.910 | 2,123,588 |
| 2023 | 342.7 | 197.1 | 1.612 | 2,167,603 |
SAIDI nMED = SAIDI without major event days. Source: EIA Form 861.
Service Area
Duke Energy Carolinas, LLC serves 500 ZIP codes in North Carolina.
Frequently Asked Questions
How reliable is Duke Energy Carolinas, LLC?
Duke Energy Carolinas, LLC had a SAIDI of 342.7 minutes in 2023. Excluding major weather events, this is near the national average.
What type of utility is Duke Energy Carolinas, LLC?
Duke Energy Carolinas, LLC is classified as a IOU serving North Carolina.
How many customers does Duke Energy Carolinas, LLC serve?
Duke Energy Carolinas, LLC serves approximately 2,186,570 customers in North Carolina.
How has Duke Energy Carolinas, LLC's reliability changed over time?
Duke Energy Carolinas, LLC has 4 years of reliability data (2020-2023). SAIDI has remained relatively stable over this period. Review the trend table above for year-by-year detail.
Utility Profile
- Type
- IOU
- State
- North Carolina
- Customers
- 2,186,570
- Annual Revenue
- $5.39B
- EIA ID
- 5416
Explore
Utilities with similar EIA profiles
Two cross-state peer sets for Duke Energy Carolinas, LLC. Same-state SAIDI neighbors stay in Read-with below; these neighborhoods are nearest other-state utilities with at least 10,000 reported customers.
Similar customer count
Nearest utilities by Form 861 customers (2.2M here), outside North Carolina.
Similar chronic SAIDI
Nearest utilities by latest SAIDI minutes (342.7 here), outside North Carolina, excluding the customer-peer set.
Source: U.S. Energy Information Administration Form 861 annual electric power industry survey · ZIP service territory: OpenEI. Disclaimer: informational only, not professional advice. See full disclaimer · methodology.