How reliable is the power in Hawaii?
Utilities that report under the IEEE 1366 standard cover 35,232 of the 529,303 customers EIA lists for Hawaii (7%). The rule is 60% and 100,000 customers, so Hawaii has no state number. Utilities on another method serve 471,149 customers.
Why Hawaii has no state figure
1 utility uses the IEEE 1366 method, 3 use another, and 5 gave no reliability figures. The two methods are not averaged together.
The largest Hawaii utilities that report under IEEE 1366
Kauai Island Utility Cooperative is the only utility in the Hawaii IEEE 1366 group: 35,232 customers.
All Hawaii utilities in the 2024 file
9 utilities in the 2024 EIA-861 files for Hawaii: 1 follows IEEE 1366, 3 use another method, 5 filed no reliability figures. 4 are listed.
| Kauai Island Utility Cooperative | Cooperative | IEEE 1366 | 35,232 | 219 | 383 | 2.39 | 4.39 | 43 | 1 of 1 | — |
|---|---|---|---|---|---|---|---|---|---|---|
| Hawaiian Electric Co Inc | Investor Owned | Other method | 309,348 | 172 | 234 | 1.66 | 1.89 | — | Not ranked | other method, not comparable |
| Hawaii Electric Light Co Inc | Investor Owned | Other method | 89,910 | 365 | 540 | 3.84 | 4.41 | — | Not ranked | other method, not comparable |
| Maui Electric Co Ltd | Investor Owned | Other method | 71,891 | 287 | 387 | 2.23 | 2.61 | — | Not ranked | other method, not comparable |
Hawaii utilities with no reliability figures
5 in the sales file, no SAIDI or SAIFI row.
| Utility | Type | Customers |
|---|---|---|
| Sunrun Inc. | Behind the Meter | 15,122 |
| Tesla Inc. | Behind the Meter | 4,743 |
| TerraForm US Energy Services, LLC | Behind the Meter | 6 |
| Greenbacker Renewable Energy Corporation | Behind the Meter | 1 |
| Hawaii Energy Efficiency Program | Not stated | — |
The biggest Hawaii utilities against the U.S.
- Hawaiian Electric Co Inc (investor owned, 59% of Hawaii customers in the file): reports on another method, SAIFI 1.89, not compared with the U.S. figure.
- Hawaii Electric Light Co Inc (investor owned, 17% of Hawaii customers in the file): reports on another method, SAIFI 4.41, not compared with the U.S. figure.
- Maui Electric Co Ltd (investor owned, 14% of Hawaii customers in the file): reports on another method, SAIFI 2.61, not compared with the U.S. figure.
- Kauai Island Utility Cooperative (cooperative, 7% of Hawaii customers in the file): SAIDI without major events 219 min, 90 above the U.S. 129; with major events 383 min against 662.
- Sunrun Inc. (behind the meter, 3% of Hawaii customers in the file): no reliability figures filed.
Hawaii report card
Smart meters: 95% of residential meters, 4 utilities (U.S. 92%). Hawaii time-based rates: 3 of 4 utilities, 4.5% of residential customers enrolled (U.S. 10.6%). Hawaii efficiency spend: $54.4 per customer (U.S. $124.2). Demand response: 0 W per customer (U.S. 77). Hawaii net-metered systems: 193.8 per 1,000 customers. Rankings.
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4 Hawaii filings in EIA-861 2024 (retrieved 2026-10-01), 1 ranked utilities. Method and sources.
Questions
Why is Hawaii not ranked?
IEEE 1366 reporters cover 7% of Hawaii customers, under the 60% and 100,000 rule.
Which Hawaii utilities use which method?
1 follows IEEE 1366, 3 use another method, 5 filed no reliability figures.