Hawaii Solar Panel Savings Calculator
Calculate how much you can save with solar panels in Hawaii. Based on 5.5 peak sun hours/day and 44.5¢/kWh average electricity rate.
5.5
Peak Sun Hours/Day
44.5¢
Avg Rate (¢/kWh)
4 yr
Avg Payback Period
18.7%
Solar Penetration
Calculate Your Hawaii Solar Savings
Average home: 6-10 kW
Your average monthly bill
South-facing is optimal
Annual Production
kWh/year
Annual Savings
per year
25-Year Savings
total estimated
Payback Period
break-even time
Monthly Savings
$150
System Cost (after ITC)
$25,200
CO2 Offset
4.0 tons/yr
Cumulative Savings vs System Cost
Hawaii Solar Panel Savings Overview
Hawaii receives an average of 5.5 peak sun hours per day, making it an excellent state for solar energy production. With electricity rates averaging 44.5¢ per kWh — well above the national average of about 16.63¢/kWh — solar panels offer significant savings potential. The typical Hawaii homeowner with a 6kW system can expect to save approximately $3,800 per year.
Solar Energy Production in Hawaii
A standard 6kW residential solar panel system in Hawaii produces approximately 9,636 kWh per year. This accounts for a system efficiency factor of 80%, which includes panel degradation, inverter losses, and temperature effects. With 5.5 peak sun hours, Hawaii ranks among the top states in the country for solar production potential.
Hawaii Electricity Rates and Solar Context
The average residential electricity rate in Hawaii is 44.5¢ per kWh according to EIA data. This is significantly above the national average, which means solar panels pay for themselves faster in Hawaii. Every kilowatt-hour your panels produce replaces expensive grid electricity, amplifying your savings. With utility rates increasing annually, your solar savings grow each year.
Hawaii Solar Incentive Programs
35% state tax credit (up to $5,000). Net metering with export credit. Federal residential solar credit ended for 2026 homeowner-owned systems placed in service after Dec. 31, 2025. For new 2026 homeowner-owned systems, do not assume the old federal 30% residential clean energy credit unless your project has documented eligibility under current IRS guidance. Hawaii also offers avoided cost net metering, allowing homeowners to earn credits for excess solar energy sent back to the grid.
Net Metering in Hawaii
Hawaii has avoided cost net metering, which is a significant financial benefit for solar homeowners. Under the avoided cost model, you receive credit at the utility's avoided cost rate for excess energy, which is typically lower than the retail rate but still provides meaningful savings.
Best Cities for Solar in Hawaii
The best cities for solar panels in Hawaii include Honolulu, Pearl City, Hilo, Kailua, Waipahu. Solar production can vary by location within the state due to differences in cloud cover, local shading, and microclimates. Southern-facing roofs with minimal shading produce the most energy. Homeowners in Honolulu and Pearl City can typically expect production close to the state average of 5.5 peak sun hours per day.
How Hawaii Compares to Neighboring States
Compared to neighboring states, Hawaii (44.5¢/kWh, 5.5 sun hours) has better sun exposure and has higher electricity rates, making solar more attractive. See how solar savings compare in Alaska, and California.
Methodology & Solar Energy Data Sources
How we calculate solar savings in Hawaii: Our solar cost, savings, and payback calculations integrate federal energy production data with state-specific incentive programs and utility rate information.
- Solar potential and production data from NREL PVWatts Calculator — the DOE's National Renewable Energy Laboratory solar energy production model for Hawaii.
- Electricity rates and utility data from EIA State Electricity Profiles — the definitive source for residential electricity prices by state.
- Federal residential clean energy credit information from the IRS Residential Clean Energy Credit (Form 5695) — current IRS guidance says the credit is not available for property placed in service after December 31, 2025.
- State incentive programs cross-referenced with DSIRE (Database of State Incentives for Renewables & Efficiency) — the NC Clean Energy Technology Center's authoritative incentive database.
- Carbon reduction calculations use EPA eGRID emission factors for the relevant Hawaii grid subregion — the official source for grid carbon intensity.
Authoritative solar and energy data sources:
- NREL PVWatts — Solar Production Model — DOE solar energy estimates by location
- EIA State Electricity Profiles — residential rates and utility data for Hawaii
- DSIRE — State Incentives Database — solar tax credits and rebates by state
- EPA eGRID — Grid Emission Factors — carbon intensity of Hawaii electricity grid
- DOE Solar Energy Technologies Office — federal solar research and cost data
- ENERGY STAR Certified Solar Inverters — efficiency standards for solar equipment
Solar Disclaimer: Savings estimates are projections based on average solar irradiance, utility rates, and incentive programs for Hawaii. Actual savings depend on roof orientation, shading, panel efficiency, installer pricing, and changes to net metering policies. Obtain quotes from 3+ certified installers for accurate costs. Incentive programs change frequently — verify current rates with DSIRE and your utility.
Reviewed by Brazora Monk · Last updated 2026 · NREL & EIA data current as of latest annual release
Frequently Asked Questions
How much do solar panels cost in Hawaii?
The average cost of a 6kW solar panel system in Hawaii is approximately $25,200 before documented state or utility incentives. For new 2026 homeowner-owned systems, this calculator does not subtract the old federal residential clean energy credit unless eligibility is documented. 35% state tax credit (up to $5,000). Net metering with export credit. Federal residential solar credit ended for 2026 homeowner-owned systems placed in service after Dec. 31, 2025.
How much can I save with solar panels in Hawaii?
The average Hawaii homeowner saves approximately $3,800 per year with a 6kW solar system. Over 25 years, total savings can exceed $61,484, factoring in a 2.5% annual increase in electricity rates.
Does Hawaii have net metering?
Yes, Hawaii offers avoided cost net metering, which allows you to sell excess solar energy back to the grid. This significantly improves the financial returns of going solar.
What is the solar payback period in Hawaii?
Based on the inputs above, the payback period for solar panels in Hawaii is approximately 14.0 years before any documented state or utility incentive. After that, your solar panels generate essentially free electricity for the remaining 15-20 years of their warranty life.