Which utilities serve Hawaii for solar?

Hawaii's three electric utility territories are Hawaiian Electric (HECO, serving Oahu), Maui Electric (serving Maui, Molokai, and Lanai), and Kauai Island Utility Cooperative (KIUC, serving Kauai). All three have closed traditional net metering to new customers. New solar installations must use CGS+ (Customer Grid-Supply Plus) or Smart Export programs, which compensate exports at rates significantly below retail. KIUC operates independently as a cooperative with its own solar program rules.

How much do solar panels cost in Hawaii?

Hawaii solar systems cost approximately $3.00/W before incentives due to island logistics and higher labor costs. A typical 6 kW system is roughly $18,000, and battery storage adds $8,000–$14,000 or more depending on capacity. Hawaii's 35% state tax credit (subject to caps) and Hawaii Energy rebates can meaningfully reduce cost. The federal residential credit (Section 25D) expired December 31, 2025 and is not available for 2026 projects.

Is solar worth it in Hawaii?

Yes — Hawaii has the strongest solar value proposition in the U.S. despite closed net metering. At $0.42/kWh, every self-consumed kilowatt-hour displaces extraordinarily expensive grid power. The economics only work with battery storage, as export compensation through CGS+ and Smart Export is far below retail. A properly sized solar-plus-battery system can achieve 6–9 year payback even without a federal tax credit.

Does Hawaii have net metering?

No. Traditional net metering in Hawaii is capped and closed to new customers across all islands. New solar customers must enroll in CGS+ (Customer Grid-Supply Plus) or Smart Export programs. These programs compensate exports at rates well below the $0.42/kWh retail import price, which is why battery self-consumption is mandatory — you need storage to capture daytime solar for evening use.

Why is a battery required for Hawaii solar?

With net metering closed and export rates far below retail, any solar energy sent to the grid during the day earns only a fraction of what you pay to buy it back at night. A battery stores daytime surplus and discharges it during evening hours, effectively converting $0.42/kWh imported power into self-generated power. Without a battery, the economic case collapses — Hawaii solar is fundamentally a battery-plus-solar market.

What financial incentives still work in Hawaii in 2026?

Hawaii offers a 35% state income tax credit (one of the nation's highest, subject to caps) and Hawaii Energy rebates for qualifying equipment. The Battery Bonus program provides additional incentives for storage. The federal Section 25D residential solar credit expired December 31, 2025 and is not available by default for 2026+ projects. Verify current program caps and funding with Hawaii Energy and your tax professional before planning.

State Guide

Solar Panel Cost in Hawaii (2026)

See how much solar panels cost in Hawaii with local electricity rates, incentives, and payback estimates.

Last updated: 2026-06-09· Source label: EIA residential electricity rates, IRS federal clean energy credit, NREL/PVWatts solar assumptions

Hawaii is unlike any other U.S. solar market — and it must be modeled differently. At $0.42/kWh (EIA March 2026), residential electricity costs more than double the national average, making every self-consumed kilowatt-hour extraordinarily valuable. But traditional net metering is closed to new customers across Hawaiian Electric (HECO), Maui Electric, and Kauai Island Utility Cooperative territories. New solar customers must enroll in CGS+ or Smart Export programs, which offer far lower export compensation. This fundamentally changes system design: battery storage is mandatory, not optional. A 35% state tax credit (subject to caps) and Hawaii Energy rebates help offset equipment cost, but the economic case only works when the system is sized for self-consumption with battery dispatch matching household load.

$0.42/kWhAvg. Electricity RateHighest residential rate in the United States by a wide margin. Net metering closed to new customers — battery self-consumption is mandatory for viable economics. EIA March 2026.

6-9 yearsSolar PaybackExtraordinary $0.42/kWh rates drive fast payback even with battery cost; 35% state tax credit helps offset equipment

$3.00/WAvg. Install CostFor a typical 6 kW system, roughly ~$18,000 before incentives. The federal residential credit (Section 25D) expired Dec 31, 2025 and is not available by default for 2026 projects.

WarmClimate ZoneASHRAE/IECC heating climate zone classification

$6.09/thermNatural Gas PriceEIA residential price

Net cost before federal credit~$15,000-$25,000+ (solar + battery)A 6 kW solar system at $3.00/W is ~$18,000. Battery storage adds $8,000-$14,000+. Hawaii's 35% state tax credit (caps apply) and Hawaii Energy rebates reduce cost. No 2026+ federal credit applied by default.

Estimated payback6-9 yearsEven with battery cost, $0.42/kWh avoided import makes payback faster than almost any mainland state. Actual depends on roof production, battery size, CGS+ export rate, and tax credit caps.

Annual savings$2,800-$4,500/yrVery high rate state — every self-consumed kWh displaces $0.42 in imported power. Battery dispatch overnight amplifies savings.

Estimates based on hawaii state averages. Your actual cost depends on roof, equipment, installer, and financing.

Calculate solar ROI →Compare payback

Know the numbers before the sales call.

No PDF upload. No account. No sales calls.

Show my solar path →

Overview

Use this result

Use the calculator inputs first, then compare the result against local rates, incentives, roof conditions, and utility export rules.

Method, assumptions, and sourcesOpen this section when you want to audit the calculation behind the estimate.Show

Calculation Method

Hawaii solar payback = net installed cost after incentives / annual avoided electricity cost plus export credits

Key Assumptions

Policy last reviewed: 2026-06-09. Federal residential credit assumptions are project-year dependent and not applied by default for 2026+ projects.
Residential rate and installed-cost figures are planning benchmarks, not a final utility bill audit or installer quote.
The model assumes a roof with usable sun exposure; shading, roof age, electrical upgrades, permitting, and financing can materially change cost.
Hawaii economics should be checked against very high electricity prices, grid export limits, and battery-backed self-consumption.
The federal tax credit only helps households with sufficient tax liability and qualifying project documentation.

Data Sources

Electricity rates

EIA Electric Power Monthly

Residential electricity-rate benchmark used for avoided-bill savings.

Solar production

NREL PVWatts

Solar production assumptions should be checked against local roof orientation, shading, and climate.

Federal incentive

IRS Residential Clean Energy Credit

Supports 2026 Section 25D expiration (residential ITC no longer available by default) for qualifying residential solar costs.

State and utility policy

DSIRE and local utility tariff pages

Used as a reminder to verify state incentives, net-metering, export-credit, and rebate rules before relying on an estimate.

Result Summary

Net cost before federal credit

~$15,000-$25,000+ (solar + battery)

A 6 kW solar system at $3.00/W is ~$18,000. Battery storage adds $8,000-$14,000+. Hawaii's 35% state tax credit (caps apply) and Hawaii Energy rebates reduce cost. No 2026+ federal credit applied by default.

Estimated payback

6-9 years

Even with battery cost, $0.42/kWh avoided import makes payback faster than almost any mainland state. Actual depends on roof production, battery size, CGS+ export rate, and tax credit caps.

Annual savings

$2,800-$4,500/yr

Very high rate state — every self-consumed kWh displaces $0.42 in imported power. Battery dispatch overnight amplifies savings.

Compare Solar Costs With Neighboring States

Solar economics vary by state. Compare Hawaii with nearby states to see how electricity rates, incentives, and payback periods differ in your region.

California Solar CalculatorElectricity rate$0.33/kWhPayback period6 yrsNet meteringNet billing (NEM 3.0

Related Calculators

Solar Payback PeriodFree renewable energy calculator Solar ROI CalculatorFree renewable energy calculator Solar Panel SizingFree renewable energy calculator

Try the Solar ROI Calculator for Hawaii→Enter your system size, electricity rate, and state incentives to estimate your solar return on investment.

Solar Panel Cost in Hawaii (2026)

Incentives & Rebates

Federal Residential Credit Caveat

Hawaii Energy + State Tax Credit

Net Metering

Top Electric Utilities

Recommended next steps

Calculate your ROI

Review an installer quote

Compare ownership models

Refine your estimate

Frequently Asked Questions