A worked example: 8 kW in Hawaii
An 8 kW system — about 19 × 425-watt panels — at Hawaii's assumed installed cost of $2.90–$3.90 per watt runs roughly $23,200–$31,200 before incentives. At about 1,580 kWh of production per installed kW, it would generate around 12,640 kWh per year. Valuing self-consumed electricity at the assumed $0.42/kWh retail rate and exports conservatively, first-year savings land near $4,374 — a simple payback of roughly 5–7 years.
There is no federal tax credit in that math: the Section 25D residential credit ended for systems installed after December 31, 2025. State or utility incentives, where they exist, would shorten payback from here.
Net metering in Hawaii
Hawaii ended traditional net metering in 2015. Current options such as Smart Export and the Battery Bonus successor programs favor battery storage and limit or time-restrict grid exports.
Hawaii solar incentives
Hawaii offers a state income tax credit of 35% of system cost (capped, commonly at $5,000 for residential systems) — one of the strongest state credits in the country.
What changes a Hawaii solar quote?
Equipment, roof condition, electrical upgrades, permitting, labor, system size, batteries and financing can all change the installed price. Savings also depend on the specific utility rate, how much solar electricity the home uses directly, and what the utility pays for exports.
Frequently asked questions
How much do solar panels cost in Hawaii?
Using an assumed installed cost of $2.90–$3.90 per watt, a typical 8 kW home system in Hawaii costs roughly $23,200–$31,200 before incentives. Smaller and larger systems scale roughly with size, though small systems cost more per watt.
Is solar worth it in Hawaii?
With Hawaii electricity around $0.42/kWh and production around 1,580 kWh per installed kW per year, an 8 kW system could save roughly $4,374 in year one, for a simple payback of about 5–7 years with no federal credit. Whether that is "worth it" depends on your rate plan, export compensation, roof, and how long you plan to stay in the home.
Does Hawaii have net metering?
Hawaii ended traditional net metering in 2015. Current options such as Smart Export and the Battery Bonus successor programs favor battery storage and limit or time-restrict grid exports.
What solar incentives does Hawaii offer in 2026?
Hawaii offers a state income tax credit of 35% of system cost (capped, commonly at $5,000 for residential systems) — one of the strongest state credits in the country. Note that the federal Section 25D residential credit ended for systems installed after December 31, 2025, so state, local and utility programs are now the main incentives for purchased systems.
Is there still a federal solar tax credit in Hawaii?
No — the 30% federal residential clean energy credit (Section 25D) ended for systems installed after December 31, 2025 under the One Big Beautiful Bill Act. Leased or PPA systems may still benefit indirectly because the system owner can claim the commercial 48E credit through 2027.
Use this as a starting point
This page provides broad state assumptions, not a current market survey or binding quote. Before purchasing, verify applicable incentives, utility rules, installer licensing, warranties and financing terms.
Where these numbers come from
State assumptions are informed by public data and reviewed periodically (September 2026):