Kauai Island Utility Cooperative
Cooperative electric utility · Hawaii · #467 of 3,199 U.S. utilities by customers · EIA utility #10071
Kauai Island Utility Cooperative is a cooperative electric utility serving 35,617 customers in Hawaii. In 2025 it sold 487 gigawatt-hours of electricity for $180.87M in revenue, an average realized rate of 37.11¢ per kWh across all customer classes and 38.43¢ per kWh for residential customers. Its reported service territory covers 1 counties. EIA records its activities as: generation, transmission, distribution.
Customers, sales and rates by customer class (2025)
| Class | Customers | Sales (GWh) | Revenue | Avg realized rate | Share of sales |
|---|---|---|---|---|---|
| Residential | 30,335 | 201 | $77.38M | 38.43¢ | |
| Commercial | 5,168 | 121 | $47.15M | 38.92¢ | |
| Industrial | 114 | 165 | $56.33M | 34.17¢ | |
| Total | 35,617 | 487 | $180.87M | 37.11¢ |
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 (553 kWh/month).
Five-year trend
| Year | Customers | Sales (GWh) | Revenue | Residential rate |
|---|---|---|---|---|
| 2021 | 34,835 | 435 | $153.65M | 36.33¢ |
| 2022 | 35,024 | 458 | $175.07M | 39.31¢ |
| 2023 | 35,173 | 466 | $169.64M | 37.54¢ |
| 2024 | 35,316 | 472 | $188.81M | 41.29¢ |
| 2025 | 35,617 | 487 | $180.87M | 38.43¢ |
Reliability (2025)
Average outage time (SAIDI): 335 minutes per customer per year
Average outages (SAIFI): 3.45 per customer
Average restoration time (CAIDI): 97 minutes
As reported for Hawaii 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: 272 GWh
Wholesale power purchased: 238 GWh
Winter peak demand: 78 MW
Energy losses: 4.1% of energy handled
Meters & rooftop solar (2025)
Smart (AMI) meters: 96.8% of 35,622 meters
Customer-sited generation (net metering): 6,641 installations, 38.4 MW of capacity
Counties served
Kauai, HI
Other large utilities in Hawaii
- Hawaiian Electric Co Inc - 310,559 customers, residential 40.54¢
- Hawaii Electric Light Co Inc - 90,899 customers, residential 45.80¢
- Maui Electric Co Ltd - 71,962 customers, residential 41.97¢
All Hawaii utilities and rates
Source: U.S. Energy Information Administration, Form EIA-861 2025 (filed by the utility; figures as published). Utility #10071 in the EIA frame.