Official EIA-861 State Grid Summary
Hawaii Power Outage Risk, Electric Utilities & Generator Sizing
Hawaii households average 5.3 hrs/yr (321 minutes/year) of total blackout duration across 2.62 outages/year (Reliability Grade C — Elevated Storm Risk), with an average residential electricity rate of 43.84 ¢/kWh.
Interactive Appliance Load Calculator
⚡ Home Backup Wattage Sizer for Hawaii
Check the appliances you need to keep running during a blackout. We calculate your continuous running watts, highest motor starting surge, and 20% NEC safety headroom automatically.
Live Sizing Result (+20% Headroom)
3,000 W
Recommended Minimum Generator / Inverter Rating
1,250 WContinuous Running
2,250 WPeak Motor Surge
Top Cities & Towns in Hawaii
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Electric Utilities Operating in Hawaii (EIA Form 861)
| Utility Name | Ownership | Customers | Outages/Yr | Annual Outage Time | Avg Restoration | Residential Rate |
|---|---|---|---|---|---|---|
| Hawaiian Electric Co Inc (#19547) | Investor-Owned | 276,206 | 1.89x/yr | 234 min (3.9h) | 124 min | 42.87 ¢/kWh |
| Hawaii Electric Light Co Inc (#8287) | Investor-Owned | 78,386 | 4.41x/yr | 540 min (9.0h) | 122 min | 48.31 ¢/kWh |
| Maui Electric Co Ltd (#11843) | Investor-Owned | 61,811 | 2.61x/yr | 387 min (6.5h) | 148 min | 43.96 ¢/kWh |
| Kauai Island Utility Cooperative (#10071) | Cooperative | 30,109 | 4.39x/yr | 383 min (6.4h) | 87 min | 41.29 ¢/kWh |