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Tax Incentives - Solar Tax Credit Hawaii - RevoluSun

Hawaii State & Federal Solar Tax Credits

Learn about the tax benefits of solar.

Solar Tax Credits

With Hawaii State tax credit set at 35% and the federal solar Investment Tax Credit (ITC) expanded to 30%, there is no better time to go solar than now!

In August 2022, Congress passed an extension of the ITC, raising it to 30% for solar installations for 10 years, from 2022-2032. (Systems installed on or before December 31, 2019 are also eligible for a 30% tax credit.) Read below to learn more about what the tax credits are, how to claim your credits and any upcoming changes.

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Residential Hawaii State energy tax credit


Originally enacted in 1976, the Hawaii Energy Tax Credit allows individuals to claim an income tax credit of as much as 35% of the cost of equipment and installation of a residential photovoltaic (PV) system. The credit is capped at $5,000 per “5 kW system,” and multiple systems may be installed on one home.
Systems must be fully installed and capable of operation by the end of the the year in which you are claiming the tax credit. If your credit is more than what you owe in that year, the credits may be rolled forward to subsequent years. Hawaii also offers a “refundable credit” for PV system owners who do not have sufficient state tax liability; the refundable credit is 30% less than the normal tax credit, but state cuts a check directly to the system owner.

Residential federal solar tax credit

The federal residential solar energy credit is a 30% tax credit that can be claimed on federal income taxes for a percentage of the cost of a solar PV system paid for by the taxpayer. The installation of the system must be complete during the tax year. In August 2022, Congress passed an extension of the ITC, raising it to 30% for installations between 2022-2032. (Systems installed on or before December 31, 2019 are also eligible for a 30% tax credit.) It will decrease to 26% for systems installed in 2033 and to 22% for systems installed in 2034. The tax credit expires starting in 2035 unless Congress renews it. There is no maximum amount that can be claimed.

How does it work?

The total value of the solar tax credit can easily be calculated by taking 30% of the solar system cost. There is no limit to the value of the credit. It’s important to note that the federal solar tax credit is a nonrefundable tax credit. This means that you only get a refund up to the amount you owe in federal taxes. The solar tax credit is only available for the owner of the system. Therefore, homeowners who install a PV system under a PPA (Power Purchase Agreement) or Solar Lease are not personally eligible for the ITC.

How do I claim the residential tax credit?

You may claim the state or federal tax credits for a residential solar panel system by consulting with your CPA or licensed tax advisor regarding the proper way to fill out the forms designated by the State of Hawaii and the IRS for their respective credits. The specific amount of tax credits you are able to claim in a given tax year may vary depending on your individual circumstances. Important Note: We are not tax professionals and are not authorized to provide tax advice to individuals. For formal advice regarding the solar tax credit, consult with a tax professional. The information provided above is from generally applicable, public sources.