Solar Panel Cost in Honolulu, HI
Estimated costs and savings for ZIP code 96817 — updated for 2026
Urgent tax credit deadlines
- Section 48E phase-out completes December 31, 2027 — the last date to begin construction; grandfathered 2026 starts have until Dec 31, 2030 to be placed in service (421 days left).
Gross Cost
$21,700
7kW system
Annual Savings
$6,776
$565/month
Payback Period
3.2 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 $3.10/W and utility rate of $0.52/kWh.
| System | Cost | Savings/yr | Payback |
|---|---|---|---|
| 4 kW | $13,043 | $3,872 | 3.4 yrs |
| 5 kW | $15,929 | $4,840 | 3.3 yrs |
| 6 kW | $18,814 | $5,808 | 3.2 yrs |
| 7 kW(typical) | $21,700 | $6,776 | 3.2 yrs |
| 8 kW | $24,586 | $7,744 | 3.2 yrs |
| 10 kW | $30,357 | $9,680 | 3.1 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
$0.52/kWh
High utility rates make solar especially valuable
Cost Per Watt in HI
$3.10/W
Near national average for installed cost
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 $21,700 before any incentives. This works out to about $3.10 per watt installed. Smaller systems start around $12,400, while larger 10kW systems can cost up to $31,000.
How long is the solar payback period in Honolulu?
The average solar payback period in Honolulu, HI is approximately 3.2 years for a 7kW system. With estimated annual savings of $6,776, 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 $565 per month or $6,776 per year with a standard 7kW solar system. Over 25 years, total savings can exceed $169,400, 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
Looking for another area? Browse all ZIP codes →