How Much Do Solar Panels Cost in Hawaii? (2024 Savings Guide)

How Do Hawaii’s Solar Prices Compare to the National Average?

The average cost per watt for solar panels in Hawaii is $3.39, which is right in line with the national average of $3.33. That means that you get about the same value for the money in Hawaii as you would in most other states when converting to solar.

However, Hawaiians use less energy than residents of any other state, according to the Energy Industries Association (EIA) and, therefore, need systems that are smaller than average to offset their energy demands. The state has an average system size of just 5.5 kW, which is less than 60% of the U.S. average.

That means your total installation price in Hawaii will be much lower than the national average — $18,645 in Hawaii compared to $29,970 in the U.S. before the federal solar credit, or $13,052 in Hawaii compared to the national average of $20,979 after the credit.

All in all, Hawaii is one of the most affordable places to go solar in the country.

What Are the Main Factors of Solar System Costs in Hawaii?

Although the average solar power system installation price in Hawaii sits around $13,000 after the federal credit, it’s not uncommon to see local installation prices anywhere between $7,119 and $21,357. The price range is so large because there are a handful of cost factors that can push your installation total above or below the state average. These include the following:

• How much energy you use in your home each month
• Whether or not you install a battery (and have access to net metering)
• The efficiency of the panels you install

We’ll explain the significance of each of these factors in the following sections.

Hawaii’s Below-Average Energy Needs

Your system size will generally be the most significant cost factor when it comes to your solar array, but the system size is based on how large of a system you need to offset your monthly energy needs. That means homeowners with higher energy demands will need larger and more expensive systems.

Hawaiians, in general, use very little electricity, having the lowest consumption rate — just 537 kilowatt-hours (kWh) per month — of any state in the country. This means a total installation price that’s well below average.

If you have a larger home, though, or just generally high energy needs, you’ll need a bigger system with more panels to offset your consumption. The more panels you install, the more expensive your home will be, so higher energy usage each month means higher installation totals.

Although your upfront cost will be higher if you install a system that will meet or exceed your energy demands, we still strongly recommend you upsize your array. A system that’s slightly oversized for your home will be far more likely to eliminate your energy bills, and that’s super important in Hawaii, which has the highest per-kWh energy rates in the nation.

Adding a Solar Battery for Net Metering and Backup Power

Next, solar batteries — like the Tesla Powerwall — add between $10,000 and $15,000 to your system total on average, but in many cases, they pay for themselves in Hawaii, and they remain desirable. Many Hawaiians opt for solar batteries for three primary reasons.

First, solar batteries give you access to effective net metering, which means you can overproduce during the day and then use that excess energy at no cost when you need it, like when your panels don’t produce electricity at night. Unfortunately, Hawaii no longer mandates that utility providers offer net metering. Some customers will still have access, but others often choose to add on solar batteries to get access to the next best thing.

Second, solar batteries let you maintain power through blackouts, which are more common in Hawaii than in most other states and are only getting more frequent.

Finally, customers of Hawaiian Electric — which now includes Hawaiian Electric Company (HECO), Maui Electric Company (MECO) and Hawaii Electric and Light Company (HELCO) — can get a solar rebate for installing batteries alongside their panels. This makes batteries far more affordable and helps reduce the payback period, which was relatively short to begin with.

We strongly recommend batteries for Hawaii solar customers. Not only can it help maximize your savings by providing effective net metering, but adding one will be cheaper and more beneficial than it would in most other states.

Hawaii’s Abundant Sunlight and Your Panel Efficiency

Another cost factor to consider is the quality or efficiency rating of your solar panels. In most cases, investing in a solar panel brand with a higher efficiency rating will mean higher equipment costs, so you should optimize your brand choice based on your current budget and long-term savings expectations.

A panel with a lower efficiency rating — like a polycrystalline panel — will produce less energy in all scenarios, while one with a higher efficiency rating — like a tier-one monocrystalline panel — will generate maximum power.

Since Hawaii sees an average of 240 sunny days per year, which is well above the national average of 205, you can choose whichever is best for you.

A low-efficiency panel will still likely produce sufficient power to save you money overall, given the abundance of sunlight, and it will keep upfront costs down. A high-efficiency panel is more likely to eliminate your electric bill and maximize your savings over time, although initial pricing will be higher.

We suggest high-efficiency panels to get the most financial benefit out of your system, even though it means paying more for your system initially.

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Additional Costs of Going Solar in Hawaii

In addition to paying for solar panels, there are some other costs you might want to consider before deciding if you can afford to convert to clean energy. We’ll explain some of these added fees below.

• Additional solar equipment: As mentioned above, many Hawaii residents choose to add on solar batteries, which can add thousands to the installation total. However, there are some other pieces of equipment that you might need to pay for separately, including inverters, conduit, wiring and racking equipment to attach your panels to your roof and electrical system.

• Building permits: All cities in Hawaii require building permits for rooftop solar systems to ensure everything is installed and connected to the grid safely. Many municipalities charge filing fees and/or inspection fees for the permits, which usually total between $25 and $300, depending on where you live.

• Administration fees and product markup: Hawaii is home to more than 75 solar panel installation companies, all of which charge different prices for their labor and product markup. Additionally, companies have different fees for administrative work, like helping you file for the solar incentives available in Hawaii, filing for permits and more.

• Interconnection fees: All electric companies in Hawaii will require an interconnection application, and most also need to complete an inspection before your system can be connected to the grid. Many companies charge application fees for interconnection, although they’re relatively low. Most fall between $25 and $150.

Watch Below: Learn What Hawaii’s Solar Tax Credit Is And How Much You Can Save

What Maintenance Costs Can Solar Owners Expect in Hawaii?

Thankfully, there are no ongoing maintenance costs you need to worry about in Hawaii. Some homeowners will opt for panel cleaning services to keep the panel surfaces free of pollen and dirt in an effort to maximize production. However, these services are voluntary, and in an area like Hawaii that gets abundant sunlight, it’s questionable whether or not you’d notice a difference in production with or without the service.

Most issues you’ll run into with your panels will be covered by your warranties. Hawaii doesn’t get much in the way of extreme weather, so your manufacturer’s warranty will likely be the most valuable coverage. Those typically last for 25 years, meaning you’ll have more than two decades without having to worry about maintenance costs in many cases.

What Are Other Ways You Can Save When Going Solar in Hawaii?

Although the cost of converting to solar in Hawaii is lower than in most states, most homeowners still look for ways to keep costs down. Below are some strategies we recommend employing to reduce the upfront and long-term price of your home solar energy system:

• Install a solar battery
• Take advantage of Hawaii solar incentives
• Choose your panel brand wisely

In the following sections, we’ll explain why and how each of these tips can save you money on the typical cost of the system.

Install a Solar Battery

One of the best ways to save over time when converting to solar in Hawaii is to install a solar battery alongside your panels. Solar batteries will bump up your upfront costs, but they very often pay for themselves in the Aloha State.

As mentioned before, Hawaii no longer mandates net metering, which means you’ll still have to pay the retail rate for any energy you pull from the grid. That means that when your panels aren’t producing sufficient energy — like at night or on cloudy days — you’ll pay the nation’s highest per-kWh rates for electricity if you don’t have net metering.

Installing a battery gives you access to what we call effective net metering because you can store free energy for later use. Any over-production can offset consumption when the sun isn’t shining.

If you don’t have access to net metering from your electric company, paying for a battery can still help you reach those near-$77,000 in energy savings that are average in the area. Plus, it boosts your home value more than just installing residential solar panels.

Take All the Solar Incentives in Hawaii That You Can

Solar incentives and rebate programs are one of the best ways to save money upfront on your residential solar system, and Hawaii has more attractive solar programs than most states.

First, all residents have access to the federal income tax credit. This provides a credit to your income taxes owed for 30% of your system total, which comes out to an average of just under $5,600 in HI.

There’s also a state tax credit called the Renewable Energy Technologies Income Tax Credit (RETITC) — formerly the Solar and Wind Energy Credit — which provides an additional credit to your income taxes owed for up to 35% of your system costs or $5,000.

Residents can earn money for all solar production via the Community Renewable Energy Program, get affordable loan funding from the GEMS program or the GreenSun Hawaii program and explore local incentives and rebates from utility companies and individual municipalities, including Honolulu (property tax exemptions and financing) and the island of Oahu (solar battery rebate).

Overall, incentives in Hawaii could save you more than $10,000, which means your panels pay for themselves much faster and you enjoy boosted energy savings over time.

Optimize Your Panel Brand

Finally, we suggest you take some time to choose the solar panel brand that works best for you and your home.

Since Hawaii sees more abundant sun than most states, residents can often get away with panels that don’t have the highest efficiency ratings. Lower-efficiency panels are more affordable upfront and lower your solar panel installation costs, but the available sunlight means you’ll still have the opportunity to offset your energy consumption.

On the other hand, installing a high-efficiency panel like Maxeon/SunPower panels will maximize your production and your savings over time, but they come at a higher upfront cost.

Ultimately, you’ll need to decide if you prefer to save upfront or save more over time on your electric bills. We recommend high-efficiency panels, as they give you the best chance to offset the well-above-average Hawaii energy costs.

What Are the Typical Costs of Hawaii’s Solar Installers?

Every solar installer in Hawaii will have different pricing based on product markup, labor costs, administrative charges and more. The company you choose will, therefore, play a significant role in your total installation cost.

The table below includes a quick look at some relative pricing estimates for what we believe are the best solar companies in Hawaii. This should help you narrow down which installers are likely to fit into your budget.

How Are Solar Costs and Regulations Trending In Hawaii?

According to the Solar Energy Industries Association (SEIA), the cost of PV equipment in Hawaii has dropped by a little over 50% over the past decade. The average system in Hawaii that costs $18,645 today would have totaled a little over $36,000.

Advancements in solar panel production and manufacturing processes are a big reason why costs have dropped so much, and we expect that downward trend to continue in the near future.

As far as incentives go, Hawaii’s regulations and solar laws seem to be pretty stagnant, which is a good thing. The incentives available right now are outstanding and better than in many other states. Since the state’s renewable portfolio standard (RPS) goal calls for 100% of Hawaii’s electricity to come from clean energy sources by 2045, we don’t foresee any negative changes to the incentives in the coming years.

Net metering is the perk that’s seeing the biggest negative changes across the country, but since the Aloha State doesn’t mandate net metering anyway, it seems that the incentives available are pretty safe.

With prices lower than ever before and incentives not set to disappear in the near future, now is a great time to go solar in Hawaii and start saving, especially since energy prices are only expected to go up as demand increases. If you’re ready for energy independence, you can use the tool below to get free solar quotes customized for your home.