Solar panels Hawaii:

Prices, incentives and best companies 2020

Avg HI solar panel cost:

$10,958 - $13,393*

Avg 25 year savings:

$36,904 - $45,105

Avg payback period:

4.4 - 5.4 years

Estimate cost and savings based on your location and power usage

* Cost data based on quotes for fully-installed solar panel systems submitted on our platform. Prices are shown after applying the 26% federal tax credit.

Hawaii solar panels guide 2020

Updated August 18, 2020

Hawaii is an ideal place for home solar in the United States. The high cost of electricity, lots of sunshine, a state tax credit, and the federal tax credit means that homeowners can get an excellent return on investment by installing residential solar panels in The Aloha State.

On this page:

Solar power prices, savings and payback in your part of Hawaii

The average cost for an installed residential solar system in Hawaii is currently $11,837 after claiming the 26% federal solar tax credit. This is $2.67 per watt. However, there is some variance in solar prices in different parts of the state. The graph below shows the average cost of installed solar systems in your part of the state.

Showing data for:

Utility provider: Hawaii Electric Light Co Inc
Utility bill: $ 262

Prices based on a 5.9kW system, after 26% federal tax credit

Cost range of local prices

$10,958-$13,393

Net profit (savings less system cost)

$36,904-$45,105

Payback period

4.4-5.4 years

Recommended size for the selected utility bill

5.9kW

Solar panel cost calculator

Cash flow graph based on cash purchase of a 5.9kW system

Are solar panels worth it in Hawaii

Solar panels have fallen in price by more than 80% in the last ten years. In 2020 they also remain subsidized by the 26% federal tax credit and the net metering law, making them an excellent investment. They offer a return well above the long term average return from both the share market and also property investment.

Another way to look at this question is the levelized amount you will pay for each kWh of power you will use over the next 25 years with and without solar panels. As you can see below the savings are significant.

Levelized cost of solar energy
?
Levelized cost per kWh is the cost of the solar system divided by the total number of kWh produced by a solar system over it’s lifetime

5¢ /kWh

If you don't get solar

81¢ /kWh

(forecast avg Hawaii electric rates over the next 25 years)

HI solar panel cost calculator

Hawaii solar incentives & tax credits

Federal solar tax credit

The most significant incentive to install solar panels for homes and businesses is the federal tax credit. Right now, the federal tax credit is equal to 26% of the total installed costs of installing a solar system. At the end of 2020, the amount of the credit will fall to 22%. This means that in order to maximize your savings potential, the best time to go solar in Hawaii is now.

Hawaii state tax credit

The Hawaii solar tax credit is equal to 35% of the actual system costs, up to $2,250. This combined with the federal tax credit allows Hawaii solar homeowners to save big when installing solar.

Net metering

Hawaii does not offer full retail net metering. Instead, they offer two alternative solar tariff options: the customer grid-supply plus tariff and the customer self-supply tariff. 

Through the customer grid-supply plus tariff, customers export all energy their solar system produces to the grid for a rate that is less than the retail value of electricity.

Customers who choose the self-supply tariff cannot export any power to the grid. Instead, they must use all of the power their solar panels produce. Homeowners can pair the solar panels with solar battery storage to save any excess energy their solar panels produce. 

Table 2: Available incentive programs
Eligibility: Federal incentive
Type: Personal Tax Credit
Eligibility: Local incentive
Type: Performance-Based Incentive

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Top models of solar panel installed in Hawaii 2020

Average cost of solar panel installation in Hawaii by system size

System size*
Cash purchase

(After tax credit)

Financed purchase

(After tax credit)

4kW $11,636 $12,451
5kW $13,960 $14,937
6kW $15,996 $17,116
7kW $18,473 $19,766
8kW $21,440 $22,941
9kW $23,265 $24,894
10kW $25,580 $27,371

Best solar companies in the main cities of Hawaii

Different types of solar companies

Solar company reviews

Home solar basics

Is it better to lease or buy solar panels in Hawaii

You will save most money by buying your solar system rather than leasing it. Read more about the pros and cons of leasing vs buying solar.

How long do solar panels last?

Minimum of 25 years but generally 30 or more

How do solar panels work on a home?

Solar panels power your house when they can but your home uses the utility company for power at other times. In 2020 "solar systems with battery storage" are becoming more popular. These are known as hybrid systems.

How do solar panels work?

Grid-tied solar system

Solar panels are mounted on your roof and wired together in groups called solar arrays. The power they generate flows into a solar inverter, where the direct current (DC) is converted into alternating current (AC). The electricity is then either used by your home or exported to the electric grid.

Off-grid solar system

Off-grid solar power involves meeting all your energy needs from the sun; there’s no utility to fall back on. The solar installation needs to power your home not just during the day, when the sun is shining, but after dark as well. This requires many solar panels, paired with a large battery system.

Hybrid solar system

In hybrid solar systems, rooftop solar panels are connected to both a solar battery and the electric grid. This reduces your reliance on the utility while also providing backup power when needed. Battery storage is still expensive but you may be able to reduce costs by using state incentives.

Read more about types of home solar systems.

Do solar panels require regular maintenance?

No, but cleaning them can improve power generation if they are dirty.

Will residential solar power system cost fall in Hawaii in 2020?

Given this environment, and the effect of import tariffs placed on solar panels by the Trump administration during 2018, it is hard to see that solar power system prices in Hawaii will fall during 2020.

How much electricity do solar panel systems generate in Hawaii?

Depending on the location, solar panels will generate different amounts of electricity.

A solar system that is installed on a south-facing 11-degree pitch roof Hawaii will generate 1,475kWh of peak DC (direct current) capacity per year per 1kW in Hawaii.

Enter your details into the solar panel calculator to see how your location, roof tilt, and roof direction impacts solar panel production.

What are the pros and cons of installing solar panels in Hawaii?

The advantage of installing solar panels in Hawaii is that there is a state-based tax credit and the federal tax credit. Hawaii also has some of the highest electricity rates in the country, which makes for a great return on investment.

The main disadvantage to installing solar panels in Hawaii is that there is no net metering offered. However, the state does have a solar tariff in place that outlines options utilities must make available for customers who install solar.

Enter your details to calculate the cost and savings you are likely to get from installing solar panels for your home.

What you can learn from our state solar panel calculator

This solar calculator requires you to input your address, utility company, your average monthly power spend - it tells you:

If you want to see all of the above but also see live pricing, the three best solar deals available in your city and get binding quotes from each of these solar companies then use this Hawaii solar panels calculator. This calculator requires you to also input your name and contact details because most of our 200+ installer partners will only authorize the sharing of their live solar pricing where we have validated that you are a real homeowner with a home in their service area. We respect the privacy of your data and only share your contact details with the solar companies you ask us to get binding quotes from.

Note: Please keep in mind that the best source of up-to-date information on incentives are the solar installers who specialize in your area.

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