Solar Panel Cost in Honolulu, HI (2026)
Solar panel costs in Honolulu, HI typically run above the Hawaii state average. A 6 kW system in Honolulu costs about $26,400 before the 30% federal ITC, with payback around 4.3 years at local utility rates.
Quick answer
In Honolulu, a 6 kW solar panel system costs about $26,400 installed (4.3-year payback). After the 30% federal tax credit, net cost is roughly $18,500. Annual savings: ~$3,400/year at 32¢/kWh.
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Estimate for Hawaii
$9,900net after 30% ITC
~4 kW · 10 panels · $14,100 before credits · 32¢/kWh
Annual savings
$2,264
Payback
4.4 yrs
25-year savings
$59,447
25-year savings timeline
Includes ~3% utility rate growth & 0.5%/yr panel degradation
Honolulu vs US Average
| Metric | HI | US avg |
|---|---|---|
| 6 kW system (before credit) | $26,400 | $16,271 |
| Net cost after 30% ITC | $18,500 | $11,390 |
| Cost per watt | $0.00/W | — |
| Annual electricity savings | $3,400 | $1,335 |
| Payback period (years) | 4.3 yrs | 9 yrs |
| Electricity rate | 32¢/kWh | — |
Updated 2026-07-07. Estimates only.
What affects solar costs in Honolulu?
Honolulu metro solar pricing runs 10–20% above the Hawaii state average, reflecting local labor, permitting, and installer competition. Solar installation costs in Hawaii reflect local labor rates, permit fees, and utility interconnection rules. A typical 6 kW system runs $16,440–$29,050 before the 30% federal tax credit, with net cost around $11,510–$20,340.
Honolulu homeowners should compare at least three local quotes specifying panel brand, inverter type, and production guarantee. Hawaii averages 32.0¢/kWh and 5.7 peak sun hours per day — strong solar production potential for rooftop systems.
Utility rules in Hawaii affect how solar credits apply to your bill — verify net metering or buyback terms for your specific provider serving Honolulu.
Honolulu solar ROI depends on Hawaii electricity rates, local install competition, and roof suitability. Hawaii install costs average $3.52/W with estimated 4.3-year payback on a 6 kW system — above US national averages.
Honolulu solar snapshot
- 6 kW system: $20,550 – $36,300
- After 30% ITC: $18,500
- Electric rate: 32¢/kWh · Peak sun: 5.7 hrs/day
- Payback: ~4.3 years · Annual savings: ~$3,400
How to maximize solar ROI in Honolulu
- Compare Honolulu installer quotes on cost per watt ($/W)
- Check Hawaii incentives — state guide
- Review how to choose installers in Hawaii
- Compare at least three installer quotes in Hawaii
- Model payback using your actual utility rate and usage
Frequently Asked Questions
How much do solar panels cost in Honolulu?
A 6 kW solar system in Honolulu, HI typically costs $20,550–$36,300 before incentives, or $18,500 after the 30% federal tax credit.
Is solar worth it in Honolulu?
With 32¢/kWh electricity rates and 5.7 peak sun hours, Honolulu homeowners often see 4.3-year payback. Use our calculator for your roof and usage.
How does Honolulu compare to Hawaii?
Honolulu install pricing is among the higher-cost metros in Hawaii.
Related pages
How We Calculate Solar Costs
MySunROI estimates combine NREL residential PV installed-price benchmarks, EIA state electricity rates, and regional labor modifiers — updated 2026-07-07.
Estimates only. Last updated 2026-07-07. Estimates based on NREL PV cost benchmarks, EIA electricity rates, and 2026 installer pricing surveys.