Is solar worth it in Hawaii?

With an average payback period of 4.2 years and 25-year savings of $106,025, solar panels in Hawaii are an excellent investment.

How much do solar panels cost in Hawaii?

The average cost of a 6kW residential solar system in Hawaii is $18,000 before incentives and tax credits.

How much can I save with solar panels in Hawaii?

Homeowners in Hawaii save an average of $4,241 per year with solar panels, totaling approximately $106,025 over 25 years.

Solar Panel ROI in Hawaii

Is solar worth it in HI?

5.9x ROI Score

4.2 yrs Payback Period

$4,241 Annual Savings

Key Solar Metrics for Hawaii

Solar Irradiance	5.82 kWh/m²/day
Estimated Annual Production (6kW system)	9,704 kWh
Average Electricity Rate	$0.437/kWh
Average System Cost	$18,000
Estimated Annual Savings	$4,241/year
Payback Period	4.2 years
25-Year Savings	$106,025

Hawaii vs National Average

Solar Irradiance 5.82 kWh/m²/day +17.3% vs national avg

National Avg Irradiance 5.12 kWh/m²/day baseline

Payback Period 4.2 years Faster than average

How We Calculated This

Our solar ROI calculations use data from the National Renewable Energy Laboratory (NREL) PVWatts API, which models solar energy production based on location-specific solar irradiance, weather patterns, and panel tilt angles. We assume a standard 6kW residential system with south-facing panels at optimal tilt.

Electricity rates are sourced from the U.S. Energy Information Administration (EIA) and represent state-level residential averages. Annual savings are calculated by multiplying estimated production by the local electricity rate. The payback period divides system cost by annual savings. The ROI score represents total 25-year savings divided by system cost.

These estimates do not include federal tax credits (currently 30% ITC), state incentives, SRECs, or utility rebates, which can significantly reduce the effective payback period. Actual results vary based on roof orientation, shading, local weather, and utility rate changes.

Compare with Nearby States

California 5.6 yr payback $2,697/yr savings

Solar Outlook for Hawaii

Hawaii's 5.82 kWh/m²/day irradiance is 17.3% above the national average, and electricity rates of $0.437/kWh drive one of the fastest payback periods in the country at 4.2 years. Annual savings of $4,241 make solar an excellent investment here.

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