D Residential Service
Kauai Island Utility Cooperative · Flat · filed 2025
What this tariff charges
| Fixed charge | $11.42 per month |
|---|---|
| Minimum charge | $13.50 per month |
| Structure | Flat |
| Filed | 2025-07-01 |
Energy rates
The charged price is the base rate plus its adjustment. Adjustments carry fuel and rider costs and are frequently most of the bill, so a comparison built on the base rate alone is meaningless.
Energy charge
| Tier | Up to | Base | Adjustment | Charged $/kWh |
|---|---|---|---|---|
| 1 | no limit | 0.34175 | 0.00000 | 0.34175 |
What it costs at different usage levels
| kWh per month | Annual total | Effective $/kWh |
|---|---|---|
| 500 | $2,187.54 | $0.3646 |
| 1000 | $4,238.04 | $0.3532 |
| 2000 | $8,339.04 | $0.3475 |
Effective rate includes the fixed charge, which is why it falls as usage rises.
Rooftop solar on this tariff
A 7 kW system costing $21,000 before incentives would save between $1,821 and $3,879 a year on this tariff, paying back in 5–12 years . No federal tax credit is included: Section 25D ended on December 31, 2025.
no sell rate filed, but this utility reports residential net metering - the range spans no export credit to full retail netting. Compare across this state →
URDB rate id 6877e17da10eb455a701cc8f · utility source document · all Kauai Island Utility Cooperative tariffs