How much does solar cost in Hawaii in 2026?

Ask ten solar companies what solar costs and you will get ten versions of “it depends.”

It does depend, but not as much as most homeowners are led to believe. Most of the price comes down to three things: how big your system is, whether you add a battery and what kind of roof you have. Here are real 2026 numbers from Independent Energy Hawaii, so you can start with facts instead of guesses.

How much does a solar system cost?

On Oahu and Maui, home solar costs about $20,000 for a 5 kW system up to about $46,000 for a 15 kW system, paid in cash, before incentives.

Bigger systems cost less per watt, from about $4.05 per watt at 5 kW to about $3.00 per watt at 15 kW.

How much does a battery add?

A Tesla Powerwall 3 (13.5 kWh) adds about $13,000. Two add about $22,000, and three add about $32,750. An 8 kW system with one Powerwall comes to about $42,000 to $43,000.

We recommend every solar customer add a battery. Savings and backup depend on equipment, usage, utility rules, weather and stored charge.

Does it cost more on other islands?

Maui pricing is the same as Oahu. Big Island pricing is about $5,000 higher to cover travel and logistics.

What can raise the price?

• Roof type: flat roofs add $0.20 per watt, and metal or tile roofs add $0.30 per watt.

• Electrical upgrades: a 200A overhead main panel upgrade is $6,500.

• Premium panels: Maxeon and Tesla panels cost extra.

• Townhomes and HOAs: extra permitting can add several thousand dollars.

Every add-on is priced upfront and confirmed during your site survey.

Are there discounts?

Yes, and they can be combined with no cap:

• Military and first responders: $500 off

• Lahaina fire families: $2,500 off

• Maui customers who add a Powerwall 3: $500 off

• Homes with a permit that can be filed online: $500 off

• JA Solar panels: $0.20 per watt off. Q CELLS panels: $0.10 per watt off.

Is there still a federal tax credit?

Not for homeowners buying in 2026. Articles and old quotes counting the expired federal homeowner credit are out of date. Do not confuse that credit with prepaid-lease pricing. A prepaid lease through Participate Energy can still cut the upfront cost by about 30 percent. For Hawaii’s state credit, see our Hawaii solar tax credit guide.

What about financing?

A Participate Energy prepaid lease brings an 8 kW system with one Powerwall 3 down to about $29,500 to $30,000. Solar loans are available through HSFCU and HOCU, subject to credit approval.

How long until solar pays for itself?

Most Independent Energy Hawaii customers see a payback of about 6 to 8 years paying cash, or about 4 to 6 years with a prepaid lease.

Key takeaways

• Home solar on Oahu and Maui costs about $20,000 to $46,000 for 5 to 15 kW, cash, before incentives.

• A Powerwall 3 adds about $13,000.

• The Big Island costs about $5,000 more.

• There is no federal tax credit for homeowners buying in 2026, but a prepaid lease cuts about 30 percent upfront.

• Typical payback is 6 to 8 years in cash, or 4 to 6 years with a prepaid lease.

See every price, add-on and discount on our Hawaii solar cost page, or get a free estimate for your home.

See the full pricing guide.

We recommend every solar customer consider a battery for evening energy use and selected-circuit backup. Savings and runtime depend on system design, usage, utility rules, weather and stored charge. Solar without batteries remains available; off-grid operation requires a separate assessment.

Solar Insure coverage is subject to equipment eligibility and policy terms.

Discounts may change and are confirmed at the site survey.