How Much Does Solar Cost in Hawaii?

Flat, published prices. No surprises. Every add-on priced upfront and confirmed upon site survey.

Prices last updated: October 2026. Cash prices from Independent Energy Hawaii’s current pricing, before incentives. Your exact price depends on your roof, electrical panel and equipment choices.

Hawaii solar prices by system size (solar only)

Oahu and Maui pricing with REC Alpha 460W panels, on an asphalt shingle roof with no electrical upgrades needed. The right size for your home depends on your usage and location.

Adding a battery

We recommend every solar customer consider a battery to use more of their own energy and power selected circuits during outages. Savings and runtime depend on system design, usage, utility rules, weather and stored charge. Off-grid operation requires a separate assessment.

Examples: 8 kW + 1 Powerwall is about $42,000-43,000. 10 kW + 1 Powerwall is about $47,500-48,500. We also install Franklin, Enphase and Sigenergy batteries. See Tesla Powerwall vs Enphase.

Hawaii solar prices by island

What makes solar cost more

Roof type

Electrical upgrades

Older homes may need a new main panel before solar can connect.

• Main panel upgrade, 100A overhead service: $4,750

• Main panel upgrade, 200A overhead service: $6,500

• Underground service main panel upgrade (includes trenching and utility work): about $15,000

• Subpanel: $800

• SPAN smart panel (optional): $4,500

Other common add-ons

• Premium Maxeon panels: +$0.15 per watt. Tesla panels: +$0.10 per watt.

• Bird-proofing trim: +$0.30 per watt

• Townhome or HOA permitting: can add several thousand dollars

• Parking bollard for a garage battery install: $500

• Removing old panels: $150

• Removing and reinstalling panels for a roof replacement: about $200-300 per panel

• EV charger: $1,500-2,900, depending on the model

What makes solar cost less

• Going bigger. Price per watt drops from about $4.05 on a 5 kW system to about $3.00 on a 15 kW system.

• A simple asphalt shingle roof with no electrical upgrades needed.

• Right-sizing. We size the system to your real usage, not the biggest system that fits.

• A prepaid lease. Participate Energy’s prepaid lease costs about 30% less upfront, including for battery-only installs. See the examples below and lease vs buy.

Current discounts

Base prices below are before qualifying discounts. Here’s what you may qualify for:

Discounts may change. Our team will confirm which discounts apply to your home during your site survey. Discounts can be combined, with no cap. Base prices assume REC Alpha 460W panels; Tesla and Maxeon panels cost extra.

Why IEH is worth it: what you get for the price

We’re not the cheapest installer in Hawaii, and we don’t try to be. The cheapest quote isn’t always the cheapest system. Here’s what comes with every IEH install:

• 2,000+ installations and 300+ five-star Google reviews.

• The first installer ever named Solar Insure Elite.

• Tesla Premier Certified Installer, plus NABCEP-certified and a certified Enphase installer.

• First year of SolarServe Standard included with every new install. Every IEH proposal includes the first year of SolarServe Standard (normally $499/year): an annual Solar Check-Up and panel washing, system monitoring and troubleshooting, and discounts on repairs. Most installers don’t include ongoing service. We do.

• A track record of service after the install. Too many Hawaii homeowners are left with orphaned systems when their installer disappears. We provide an ongoing service option for our installations and systems left behind by other installers. We even take care of systems other companies left behind through SolarServe.

• Up to 30 years of coverage through Solar Insure. SI-30 Solar covers panels, inverter, optimizers, racking and labor, plus eligible resealing and reflashing around roof penetrations, subject to policy terms. It’s transferable, with $0 deductible, $0 subscription and $0 onboarding fees. Optional SI-30 Total adds battery coverage.

The real cost of solar: upfront price vs. total cost

The sticker price is only part of the story. How you pay, and what you pay over time, matters more.

Option 1: Pay about 30% less upfront with a prepaid lease

Through our partner Participate Energy, a prepaid lease costs about 30% less upfront than paying cash. It also works for battery-only installs.

Paying about 30% less upfront for the same bill savings means your system pays for itself about 30% faster.

Option 2: Finance smarter, because total cost beats monthly payment

A low monthly payment can hide a much higher total cost. Here’s an example on a similar system:

A shorter repayment period can lower total interest costs. Compare actual lender disclosures before deciding.

Our loan partners:

• HSFCU: APR as low as 7.7%, 8-year term, loans up to $75,000, with 0% APR and no payments for the first 18 months.

• HOCU: APR as low as 6.99%, 10-year term, loans up to $100,000, with 0% APR and no payments for the first 24 months. Learn more at HOCU.

Examples only, based on typical system pricing. HSFCU example: $57,000 financed, 8-year term, 0% APR for 18 months, then 7.7% APR. All loans are subject to credit approval. Rates and terms may change. Lease figures are examples and subject to approval.

How to compare solar quotes fairly

• Compare total cost, not just price or monthly payment. Add up what you’ll pay over the life of the loan or lease.

• Compare the same equipment. Panel brand, battery brand and storage size all affect price. We install Tesla, Franklin, Enphase and Sigenergy batteries, so you can choose the one that fits you.

• Check what’s included. Permits, roof-type adders, electrical upgrades, utility paperwork and monitoring.

• Check the warranty. How long, what it covers and whether it costs extra.

• Ask who services it later. Who will be there in year 10? With IEH, the first year of SolarServe Standard is included.

• Watch for outdated tax credits. Homeowner purchases in 2026 no longer qualify for the federal residential credit. Do not confuse that expired credit with prepaid-lease pricing.

Hawaii solar incentives

Homeowners buying solar in 2026 no longer qualify for a federal tax credit. A prepaid lease through Participate Energy can still cut the cost by about 30%. For Hawaii’s state tax credit, see our Hawaii solar tax credit guide.

How long does solar take to pay for itself in Hawaii?

Most IEH customers see a payback of about 6-8 years when paying cash, and about 4-6 years with a Participate Energy prepaid lease. Your exact numbers depend on your bill, system size and location, and they’re in your proposal.

Earn $1,000 for every referral

Know someone thinking about solar? Independent Energy Hawaii pays $1,000 for every referred homeowner who goes solar with us. Anyone can refer, and you don’t need to be a customer. There’s no limit on referrals, and you’re paid once the install is finished and the project is closed out. Referrals must be new homeowners in our service areas, submitted before they contact us. Refer a friend.

Want your exact price? Get a free, itemized estimate or call 808-460-6015.

Financing examples are illustrative, not lender quotes. The HSFCU example assumes the eight-year term includes the 18-month zero-payment period, leaving 78 payments at 7.7% APR, with no fees. Confirm repayment timing, fees and actual disclosures with the lender. Subject to credit approval; rates and terms may change.