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Hawaii Solar Incentives (2026): RETITC, Utility Export Programs & Federal Credits

Hawaii has some of the nation's highest electricity rates and excellent sun exposure, making solar particularly valuable. In 2026, the main financial incentives include the Renewable Energy Technologies Income Tax Credit (RETITC), utility export programs, and federal tax considerations. This guide breaks down what's available now and how to maximize your savings.

Hawaii's solar market is shaped by high electricity costs (some of the highest in the nation), strong sun exposure, and a mix of state and utility-level incentive programs. In 2026, federal incentives for homeowners have changed, and state programs have evolved. Below is a clear guide to current opportunities, program details, and practical steps to maximize value.

Federal Solar Incentives in 2026

Residential Clean Energy Credit (Federal)

As of early 2026, the IRS indicates the Residential Clean Energy Credit is not available for systems placed in service after December 31, 2025. If your system was installed by the end of 2025, you may still be able to claim or carry forward unused credit.

What this means in Hawaii

  • 2026 installations: Should not assume a federal homeowner tax credit in savings models.
  • 2025 or earlier: You may still claim the credit if you meet eligibility rules.
  • Business systems: Different rules may apply; confirm with a tax advisor.

💡 Tip: Even without the federal credit, Hawaii's high electricity rates and strong sun exposure make solar attractive from a cash-flow perspective.

Hawaii State Solar Incentives

Renewable Energy Technologies Income Tax Credit (RETITC)

Hawaii's RETITC allows homeowners and small business owners to claim a state income tax credit for qualified renewable energy system installations. The credit is typically 35% of the system cost (up to specified limits).

Key details: Eligibility, cost limits, and timeline depend on specific program rules. Work with your installer to confirm your system qualifies and to track documentation for the credit claim.

Utility Export Programs and Net Metering

Most Hawaiian electric utilities have programs for residential solar export. The specifics vary by island and utility:

  • Hawaiian Electric (HECO): Smart Renewable Energy Export (SRE) program allows customers to export excess solar to the grid with compensation.
  • Kauai Island Utility Cooperative (KIUC): Schedule Q-R and related programs define export terms. The program may have enrollment caps and compensation rates approved by the Utility Commission.
  • Big Island Electric (HELCO): Interconnection rules and export compensation are set by tariff. Confirm current rules with your utility.

Why this matters: Export compensation rates directly affect long-term payback. A system that maximizes self-consumption (using your own solar power rather than exporting) can improve overall return. Discuss battery storage options with your installer if export rates are low.

Property Tax Treatment

Hawaii generally does not assess property taxes on the added value of residential solar installations. This is a significant advantage that improves long-term economics.

Sales Tax

Hawaii exempts solar equipment and installation labor from state sales tax, which reduces upfront cost.

Financing and Battery Programs

Green Energy Money$ (GEM$) Financing

Hawaii's Green Energy Money$ program has offered low-interest financing for solar and battery projects. Availability and terms have changed over time:

  • Program status: Check with the Hawaii Department of Budget & Finance for current eligibility and enrollment status (some periods have had enrollment pauses).
  • Use: Financing for solar, battery, and related equipment; repayment tied to property tax bill.

Battery Rebates

Some Hawaiian utilities have offered rebates for residential battery storage to support grid stability. Check with your utility for current programs.

How to Maximize Solar Savings in Hawaii

1) Understand your utility and tariff

Request your utility's current solar export tariff and interconnection rules. Export compensation rates and enrollment caps vary by island and can shift over time.

2) Consider battery storage

High electricity rates and time-of-use pricing make battery storage particularly valuable in Hawaii. A system that shifts solar production to evening peak hours can reduce bills more than export alone.

3) Size the system to match your usage pattern

Review your bills to understand when you use the most electricity. Oversizing to chase export credits may not be as beneficial as sizing to offset your actual consumption.

4) Confirm RETITC eligibility and documentation

Work with your installer and tax advisor to ensure your system qualifies for the RETITC and that all documentation is in order before you claim the credit.

Compare Multiple Bids

Get quotes from installers familiar with your utility and island. Ask each bidder to model system production, export scenarios, and long-term payback using your actual rate structure.

Solar Installation & Choosing a Solar Company in Hawaii

What to look for in an installer

Hawaii's island-specific interconnection and export rules make local expertise valuable:

  • Utility experience: Ask if they regularly work with your specific utility (HECO, KIUC, HELCO, etc.) and understand current export programs and enrollment status.
  • Interconnection and permitting: Confirm they handle all required paperwork, inspections, and utility coordination end-to-end.
  • Production modeling: Ensure they account for your actual roof orientation, shading, and island-specific weather patterns.
  • Battery familiarity: If you're considering storage, choose an installer with proven battery installation and troubleshooting experience.

Questions to ask each bidder

  • How do they model your export compensation under your utility's current tariff?
  • What is their typical interconnection timeline (utility approval to grid connection)?
  • Do they assist with RETITC documentation and planning?
  • What warranties (equipment, workmanship) and monitoring options are included?
  • Do they offer battery storage add-ons, and what are the performance expectations?

Solar Incentives by State

Explore state-specific solar incentives, net metering rules, tax credits, and rebates to maximize your savings on solar installation.

FAQ: Hawaii Solar Incentives (2026)

Ready to See What Solar Could Save You in Hawaii?

Hawaii's high electricity rates make solar economics compelling. Get free quotes from installers familiar with your island's utility and interconnection rules to see real payback scenarios.

Sources

Hawaii Solar Incentives (2026): Tax Credits & Net Metering