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Solar Panel Cost in Honolulu, HI

Estimated costs and savings for ZIP code 96817 — updated for 2026

Urgent tax credit deadlines

  • Section 30D EV credit (up to $7,500) — expires June 30, 2026 (12 days left).
  • Section 48E solar ITC safe harbor — construction must start by July 4, 2026 (16 days left).
See the full deadline tracker

Gross Cost

$29,400

7kW system

Annual Savings

$1,694

$141/month

Payback Period

17.4 yrs

Break-even

Peak Sun Hours

6

hrs/day avg

Solar System Cost Breakdown — Honolulu, HI

Estimated costs and savings for different residential solar system sizes in ZIP 96817. Costs based on HI average of $4.20/W and utility rate of $0.13/kWh.

System Cost Savings/yr Payback
4 kW $16,800 $968 17.4 yrs
5 kW $21,000 $1,210 17.4 yrs
6 kW $25,200 $1,452 17.4 yrs
7 kW (typical) $29,400 $1,694 17.4 yrs
8 kW $33,600 $1,936 17.4 yrs
10 kW $42,000 $2,420 17.4 yrs

Solar Production in Honolulu, Hawaii

Average Peak Sun Hours

6 hours/day

Excellent solar resource — among the best in the US

Est. Annual Production (7kW)

13,031 kWh

Based on 6 PSH × 7kW × 365 days × 85% efficiency

Average Utility Rate

$0.13/kWh

Moderate rates — solar still provides solid returns

Cost Per Watt in HI

$4.20/W

Above national avg — get multiple quotes

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Solar Panel FAQ — Honolulu, HI

How much do solar panels cost in Honolulu, HI?
A typical 7kW solar system in Honolulu, HI (ZIP 96817) costs approximately $29,400 before any incentives. This works out to about $4.20 per watt installed. Smaller systems start around $16,800, while larger 10kW systems can cost up to $42,000.
How long is the solar payback period in Honolulu?
The average solar payback period in Honolulu, HI is approximately 17.4 years for a 7kW system. With estimated annual savings of $1,694, the system pays for itself and then generates free electricity for the remaining 15-20+ years of its lifespan.
How much can I save with solar panels in 96817?
Homeowners in Honolulu, HI (ZIP 96817) can save approximately $141 per month or $1,694 per year with a standard 7kW solar system. Over 25 years, total savings can exceed $42,350, depending on utility rate increases.
How many peak sun hours does Honolulu get?
Honolulu, HI receives an average of 6 peak sun hours per day. This is above the national average, making solar highly effective in this area.
What size solar system do I need for my home in Honolulu?
The average home in Honolulu, HI needs a 7kW solar system to offset their electricity usage. The exact size depends on your monthly electric bill, roof orientation, and available space. A 7kW system would produce approximately 13,031 kWh annually in ZIP 96817.

Solar Tools for Hawaii

ROI Calculator

Exact payback analysis

System Sizer

Find your ideal kW

Incentive Finder

HI rebates & credits

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