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2019 Policy Grade


Avg. Yearly Savings


Congratulations! You've found the ultimate guide to going solar in Hawaii

2019 Policy Grade


Avg. Savings/year


Your 2019 guide to getting solar panels for your home in Hawaii

This page is a complete guide to the complicated and sometimes confusing process of installing solar panels on your Hawaii home. Since there's a lot to consider, we've separated the page into sections to help you find what you are looking for. If you find this page useful, please share it with someone who might also find it interesting!

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** What's new for 2019 **

The newest news from the Aloha State is the HECO program designed to let anyone with solar panels connect to the grid and get credit for their excess energy. Called "Customer Grid Supply Plus," it allows for home solar without batteries, which can power the home and send excess electricity to the grid, with a caveat or two. It gets kind of complicated, and there are other options for people who do want to install batteries to store solar energy, so read on below to discover more about how it all works.

In general, Hawaii has extremely high electricity costs, so solar can save you a lot of money here. How much money depends on which island you live on and how much electricity you use, but everyone in Hawaii can grab the US federal solar tax credit alongside Hawaii's own state solar tax credit to help them on their way. It's important to know that Hawaii's state government has your back. Even without huge incentives or a perfect net metering program, the state is committed to achieving 100% renewable energy by 2045, and they're gonna need a lot of help form folks like you to do it.

So check out this page full of information about solar panels in Hawaii, and get ready to go solar!

Questions? Our network of solar experts are on call to assist you! Simply sign up for personalized help. You can get discounted pricing as low as $3,000/kW! This is paired with the very strong Hawaii solar panel incentives below.

The Solar Strategy section is focused on the 3 ways of paying for solar in Hawaii, so you can decide which is best for you. We've created a tool that asks you a few questions and recommends whether you should pursue a solar lease, loan, or outright purchase. Then, we provide detailed analysis of how each works.

The Policy Information section contains all our latest research on the rules set by lawmakers and the Public Utilities Commission, which determine how easy it is to go solar in Hawaii. These policies and rules govern everything from renewable energy mandates to interconnection, and have a huge effect on the viability of solar.

Finally, the Solar Incentives section includes information about money-back rebates and grants, tax credits, and tax exemptions for going solar in Hawaii.

Click any of the boxes below to go to that section of the page, or scroll down to read the page in order.

Your Solar Strategy in Hawaii

Figuring out the best way to go solar in Hawaii can be a little daunting. From loans and leases to power-purchase agreements, there are a lot of options out there. To help you pick the one that might be best, we've created the handy decision tool below.

We'll ask you a few simple questions about you and your home. Once you're done, we'll recommend a good option. Further down this page, we provide cost estimates and example return-on-investment calculations for all the various options:

How should you pay for solar?

Use our decision tool to find out!

How to pay for solar panels in Hawaii

The chart above shows the 25-year returns for an investment in solar whether you choose to purchase a system with cash or pay over time with a loan or lease. As you can see, the purchase option leads to the highest dollar-amount returns over time, but it also requires an up-front investment. We've also estimate the returns if you take a loan to pay for solar, or if you sign up for a PPA.

Hawaii does something a little different than most states when it comes to solar payback. For most people, the easiest option (the one that doesn't involve batteries), is HECO's "Customer Grid Supply Plus" program, aka CGS+. Under the program, your home still gets to use the solar energy your system generates, up to as much as it needs while the sun is shining. But the excess electricity made by your panels goes to HECO, who sends it to other customers. In most states, you get full credit for that electricity, and whatever you end up needing from the utility at night offsets what you've banked up by sending electricity.

In Hawaii, however, you get a reduced-cost credit for that electricity. So while you might be paying $.30 for every kilowatt-hour (kWh), you'll only be getting, say, $.108 per kWh (if you live on Oahu). That makes it hard for us to estimate how much you'll save, because if you're a heavy user of electricity during the day and light at night, you'll actually be saving more than if you have a more typical usage pattern, heavy during "peak" times like afternoons and evenings. The system HECO uses isn't perfect, and there's no telling if they will come up with something better than CGS+, or what exact effects it will have on your usage, or long-term, on your rates.

The US Energy Information Administration shows the average household usage in Hawaii is just over 6,000 kWh per year. That's actually pretty low, which makes sense considering the relatively mild climate. But that 6,000 kWh costs a ton of money, because the average price of electricity is $.30/kWh, compared to $.13/kWh US average.

For all the estimates in this section, we assume that 39% of your solar energy will power your home, and 61% will go to HECO. That represents a pretty standard usage curve that's heavy during peak times. We also assume the compensation for excess energy will remain relatively unchanged, but also that the price you pay for retail energy won't change much over the next 25 years. After all, as Hawaii transitions to 100% clean energy, the costs should actually stabilize, because HECO won't be reliant on the fluctuating, impossible-to-predict prices of imported fuels.

If you're ready to read on about our estimated solar savings for Hawaii, read on to get detailed information about each option.

How much can you save with solar?

Find out

Option 1: Paying cash for solar

An outright purchase is a very fine way to go solar in Hawaii, and with the combination of two sweet tax credits and savings on your electric bill, you can have your system paid off in just 5 short years. Speaking of electric bill savings, because Hawaii does things differently with CGS+, we've designed a system here that we estimate will make enough electrciity to offset your usage during daylight hours, while not generating so much that you end up with a huge amount being sent to HECO and paid out at a lower-dollar rate.

In our example, you put down $16,000 up front, but by the end of year 1, incentives and energy bill savings will erase a bunch of it. Over 25 years, your system will have produced over $26,000 in income, thnaks to all the money you'll be saving on electricity. But even though that sounds huge, look into the solar loan or HELOC option, because taking a loan to buy an income-generating asset means it'll pay for itself starting on day 1, and you'll actually be making money as you pay the loan off.

Here’s how the numbers pencil out when you pay up front for a 5.2-kW rooftop solar system in Hawaii:

  • Installing a typical 5.2-kW solar system should start at about $16,000. Don’t worry, because the two tax credits you're about to get will reduce that by a ton after just 1 year.
  • First, take the federal tax credit, equal to 30% of out-of-pocket costs. That's $4,800 off, for a new price of $11,200.
  • The Aloha state gives you a nice tax break, too. This 5.2-kW system is eligible for the full $5,000, so now you've only invested $6,200 after year 1.
  • On top of the tax credits, you get to save a bundle in electricity costs. Subtract your first year’s energy savings, which we estimate to be about $1,400. That reduces your cost after the first year to be only a little more than $4,800.
  • Over the 25-year life of your system, you'll see a total net profit of $26,251, after the system pays for itself.
  • And don't forget... your home's value just increased by over $6,000, too (your expected costs after incentives)!
  • In addition to all that cash (and home value), you’ve created some green for the earth as well by not using electricity from fossil fuels. It's like planting 128 trees a year, every year your solar power system is humming.
Keep in mind, the numbers above are based on an average home in Hawaii. If you're ready for a custom quote for a solar panel system, our network of experts are on call to assist you. Simply sign up for personalized assistance on our special solar deals page.

Option 2: Using a loan to pay for solar

Did you ever see that Matthew Lesko guy on late-night TV? He had an informercial all about how the government is giving away free money, and he was basically begging people to buy his book that told you how to get all that sweet gubbamint cash. Buying solar with a loan in Hawaii is kinda like that, but, y'know... not insane.

This is without a doubt the best solar option when it comes to return on investment. That’s because it relies on using a bank's money for the purchase price, which you then pay back over time out of the electricity savings caused by the system. We know you hate your electric bill, and in Hawaii, a solar loan will take out a huge chunk of it—enough that it will pay for itself on day 1, because your savings will always be greater than your costs.

The reason this works so well is that you don’t have to put any money down, but you still get all of the incentives that go along with buying solar. You'll get the 30% federal tax credit and the $5,000 Hawaii tax credit, and then you'll start saving on your electric bill. As we mentioned above, HECO's CGS+ program works a little differently than normal, but the numbers come out relatively simply. Here's how it works:

Here’s how the numbers pencil out for a Hawaii solar purchase with a solar loan:

  • Installing a typical 5.2-kW solar system should start at about $16,000. That's how big your loan will need to be to cover it.
  • The electricity your system will produce will net you about $1,415 off your electric bill in year 1, but your loan payments will total $1,480, for a difference of $65, or about $5.50 per month.
  • On top of that, your tax savings for the year will be $9,800 ($4,800 from the feds and $5,000 from Hawaii)! You'll come out $9,770 ahead after year 1, which is so crazy that we're thinking about moving to Hawaii right now.
  • You'll never actually spend a penny on loan payments. And after the loan is paid off, your profits stack up just like if you bought the system outright. You'll end up with $20,000+ in profits over our 25-year example.
  • On top of the green that will stay in your pocket, your system will mean green for the environment, too. 128 trees-worth, every year!
Keep in mind, the numbers above are based on an average home in Hawaii. If you're ready for a custom quote for a solar loan, our network of experts are on call to assist you. Simply sign up for personalized assistance on our special solar deals page.

Option 3: Buying the electricity, not the panels with a Power Purchase Agreement (PPA)

Hawaii is a state where a solar Power Purchase Agreement isn't a runaway first choice. That's because electricity prices are so high here that paying for solar a different way is monumentally better. That's not saying that a PPA is a bad idea—far from it, actually—and if you don't have a ton of cash or equity in your home, you can still save a good deal of money over the next 25 years.

How a solar PPA works

Solar PPAs are also called "third-party solar," because they're basically billing arrangements under which a third party (your solar installer) owns the solar panels that are installed on your house and sells you the solar energy for a price a little lower than the cost of electricity from the utility company. PPAs work great for people without any equity, income, or cash, because they don't require any down payment.

In Hawaii, you can get a PPA that will save you about $64 per month starting now, which is no small thing. Because we estimate that the price of electrciity will remain relatively stable over the next few decades as the state switches to 100% renewable power, the PPA might not actually save you a ton of money over the long term. That's because most PPA contracts include a clause that raises the per-kWh price you pay by around 2% annually. According to our estimates, that will eventually lead the PPA to ost more than electricity from HECO after aabout 14 years. But hey, if you haven't got equity, cash, or income, there are worse ways to save $64 per month for a decade.

Keep in mind, the numbers above are based on an average home in Hawaii. If you're ready for a custom quote for a solar PPA, our network of experts are on call to assist you. Simply sign up for personalized assistance on our special solar deals page.

How much can you save with solar?

Find out

Hawaii Solar Policy Information

Ever wonder why solar seems to be everywhere in some states, but not in others? We did too.

State legislatures and public utilities commissions can enact rules to make solar power accessible for everyone. Favorable rules explain why some of the cloudiest states—New York, New Jersey, and Connecticut, are doing so well with solar, and yet some of those with the most natural solar resources—like Alabama, Mississippi, and Georgia—are doing so poorly.

Below is important information about the public policy, rules, and economic reasons that affect your ability to go solar here in Hawaii:

Hawaii's Renewable Portfolio Standard

100% by 2045

Grade: A

Hawaii's Renewable Portfolio Standard grade

A Renewable Portfolio Standard (RPS) requires utilities in the state to eventually source at least a certain percentage of their electricity from clean, renewable sources like solar panels.

In 2015, Hawaii kicked its pursuit of renewables into the highest gear possible. The state now has a goal of 100% renewable energy generation by 2045, up from its earlier goal of 40% by 2030.

The 100% goal is being phased in by the following schedules:

  • 15% of net electricity sales by December 31, 2015
  • 30% of net electricity sales by December 31, 2020
  • 40% of net electricity sales by December 31, 2030
  • 70% of net electricity sales by December 31, 2040
  • 100% of net electricity sales by December 31, 2045

Hawaii is setting the pace for the nation, and it's doing it because the switch to renewables is so necessary. Much of the energy generation in Hawaii is done with imported fuel oil and other fossil generation. That's why the state has such terribly high electricity prices—shipping in all that fossil fuel is expensive.

Hawaii also has a good chance at meeting its 2045 goal, too, considering its natural wind, solar, and geothermal potential. Let's all give a cheer for Hawaii and its forward-thinking governor, David Ige! Hip-hip hooray!

Learn more about Renewable Portfolio Standards

Hawaii's RPS solar carve out


Grade: F

Hawaii's Solar Carve-out grade

You'd think with a goal of 100% of electricity from renewable source, we might see a specific requirement for solar here, but that's not the case. Not to worry though, since Hawaii has high electricity prices and a great solar tax credit, the possibilities for huge savings with home solar are better here than in almost any other state.

Learn more about Solar Carve-outs

Hawaii Electricity Prices


Grade: A

Hawaii's Electricity cost grade

Hawaii electrciity prices fluctuate month by month, because of the state's unique mix of imported and locally-generated energy. For the last year, the average price you pay has been about 30 cents per kilowatt-hour of electricity. 30 cents! That’s over two times than the rates most mainlanders pay!

If you live in Hawaii, we have no doubt that you hate how high your electric bill is every month. And being subject to the fluctuations only hurts more! Hawaii has a goal of 100% renewable energy by 2045, so why not do your part today and get mutlitple quotes for a home solar system.

Find out why electricity prices matter

Hawaii Net Metering

Grid Supply Tariff

Grade: D

Hawaii's Net Metering grade

Hawaii no longer has net metering for solar owners. Instead, HECO has switched to giving homeowners a choice. In Hawaii, you can set up your solar panels under a system called "Customer Self Supply," which means you have to use all the solar energy to power your home (hello, batteries!) or "Customer Grid Supply," which means you send all your solar energy to HECO, and they pay you less than retail prices for it. Finding out which system works bets for you can be complicated, so make sure to talk with a solar expert near you to get help with this complicated decision.

Learn more about net metering

Hawaii Interconnection Rules

Standard for most

Grade: B

Hawaii's Interconnection Standards grade

Even though net metering is gone in Hawaii, getting your system connected to the grid is now much easier than it used to be. That's good news, because it used to be nearly impossible to get solar in some places here.

Learn more about solar interconnection rules

Solar Incentives in Hawaii

Next to high electricity prices and net metering, solar incentives have traditionally been the most important factor for whether home solar power makes financial sense in a state. In the past, some states with otherwise lousy policy had tremendous incentives that drove down the up-front cost of going solar so much that homeowners could save oodles of money even without net metering or a good RPS.

These days, the big incentive most people can get is the Federal Solar Tax Credit that earns you 30% of your total system costs back after just 1 year. State incentives play less of a role than in the past, but some really good ones are still out there, ready to help homeowners go solar and save money before you know it.

Let's see how Hawaii measures up:

The availability of state solar incentives for residential solar systems was sourced from the Database of State Incentives for Renewables and Efficiency, utility company websites, and the state public utility commission.

Hawaii Solar Power Rebates


Grade: F

Hawaii's Solar Rebates grade

Hawaii utility companies offer no rebates for getting solar installed on your home. Usually, we'd be crying in our poi about that, but the state does have a really excellent tax credit that will get you up to $5,000 back when you go solar, so no worries!

Learn more about solar rebates

Hawaii Solar Tax Credits

35% or $5,000

Grade: A

Hawaii's Solar Tax Credits grade

Here's where Hawaii wins when it comes to solar. If you buy a solar system in the Aloha state, you'll see 35% of the cost (up to $5,000) come back as a credit at tax time, in addition to the federal tax credit of 30% (with no limit)! When April 15th rolls around, a standard 5-kW system will net you an estimated $11,000 back from both credits, provided you owe at least $6,000 to the feds and $5,000 to the state. These credits reduce your first-year cost of that 5-kW solar installation to just $9,000. Wow.

Learn more about state solar tax credits

Hawaii Solar Performance Payments

Sensible for solar farms only

Grade: D

Hawaii's Solar Performance Payments grade

Hawaii Net Metering is dead, and the "Performance Payment" that is offered is less than retail. It works for large solar farms, because they can earn more by selling power at the special rate than they could on a wholesale market. Home solar is still a great choice in Hawaii even without Performance Payments, because the electricity prices are so insane. Check out the Net Metering section below for more information on selling your power into the grid.

Learn more about SRECs

Property Tax Exemption

100% HNL only

Grade: B

Hawaii's Solar Property Tax Exemptions grade

When you add a solar power system, you add value to your home. How much value you add depends on how much money you save on your energy bill. In a state like Hawaii, solar panels can save you a lot – more than anywhere else in the country, in fact. Normally, as you are all too aware, an increase in your home’s value means a corresponding increase in property taxes. Many, if not most states exempt you from those property taxes. Hawaii sadly lacks such a statewide law. Don’t panic just yet though. The City and County of Honolulu has passed their own property tax exemption! No, that’s not the entire state, but it is about 70% of the people here in Hawaii.

If you’re one of those 70%, you’re already golden – you’re 100% exempted from property taxes associated with your new solar power system for 25 years. If you’re one of the unlucky 3 in 10, sounds like we all need to get on the phone to the state capitol to tell them we want solar power tax exemptions!

Seriously… that phone call might not be a bad idea, because Hawaii is slacking altogether on these tax exemptions. In addition to lacking a statewide property tax exemption, Hawaii fails to exempt Excise and Use Taxes for solar panels.

Sales Tax Exemption


Grade: F

Hawaii's Solar Sales Tax Exemption grade

Hawaii does not have a true sales tax, but the General Excise Tax is built into the price of goods and services throughout the state. With one simple law exempting solar panels and their installation from such those taxes, the legislature could reduce the initial cost of solar systems by another 4-5%.

Learn more about tax exemptions for solar

The consensus on Hawaii solar power rebates and incentives

Hawaii is really in a class all its own when it comes to the money you can save by installing a solar power system, and the delightfully short payback timeframe. With the huge amount of cash you’ll save, and how fast you will save it, it’s hard for us to give Hawaii anything but the full 5-sun rating.

Really though, the state gets such high marks only because of the high electricity rates. The rest of the landscape is less rosy… In fact, it’s pretty bad overall.

While the state tax credits are nice, the legislature should be doing more to encourage solar power. The tax exemptions should be extended, and we’d love to see tariff payments be paid in addition to net metering surpluses, as Renewable Energy Credits are in other states. At the very least, the net metering law needs to be amended to force utilities to pay you for yearly surpluses, and interconnection laws need to be vastly simplified and improved.

With the improvements we recommend, Hawaii would be an A+ for solar. In fact, if your tolerance for messing around with utility company rules is high, it already is. Of course, if you’d like some personalized assistance from someone who’s in your corner, get in touch with us and we’ll have an expert contact you in a jiffy.

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Make Money Online Blog
Make Money Online Blog

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Another and maybe a better choice is to opt for a contract agreement with VIVINT or RevoluSun. These companies guarantee you 1/3 the savings of your current electric bill and lock in a max of up to 3% increase.
No up front costs, take full responsibility for all liability to the system and damage if caused by their system and will give you the full system outright after 20 years.
That is a better deal for some without the upfront costs.


do the math, 3% increase for the next 20years!???? not trying to bad mouth vivint or anything cause obviously they are doing something right!!! you cant look at your situation of now…you have to look at the long run and how much you will save…you will pay vivint for the next 20years by the time the 20 years is up you have spent anywhere from 80-300 thousand dollars depending on how big your system is in the long run…you finance and purchase your system you own it within 5 years and thats it…you dont have to worry about paying other… Read more »


I know that the federal tax credit can be carried over to another year if it is not all used in that year. What about state of hawaii? do they rollover the exemption?


I highly recommend using a liscensed Electrician versus the Flash in the pan Solar guys. In fact, many of these “Solar companies” outsource the installs and engineered drawings to Electrical Contractors. The good guys are going to have a licensed Electrician on site at all times. This is to ensure proper installation, afterall, the majority of failing panels is due to improper installs. Research not only pricing and product, but contractor and installation team.

Solar HI
Solar HI

Many of the “Solar companies” are in business because they have a high pressure sales staff that can sell overpriced options and convince homeowners that they need to commit ‘right now’ or miss out on the opportunity. They also love to sell leased system ($0 down!!) that cost $80,000 over 20 years rather than a customer owned system that ends up costing $15,000 after tax incentives. Most of that $80K goes out of state as lease payment to investors.


Homeowners…if you are a licensed electrician or if you know one, you can pull the permit yourself. I,m a licensed electrician and I installed the system on my home myself. I saved thousands. I received quotes from my any different companies on Oahu and they all veried from 40k to 65k. My out of cost for materials was about 25k. I installed it by Myself after work and on weekends. It is not rocket science. But if you are not electrically or mechanically minded, I would advise against doing it yourself.

Solar HI
Solar HI

I did the same thing 6 years ago. The quotes were $48 to $52k and I had the equipment shipped here for about $30k. Now I’m in the biz as a licensed electrical contractor and can commission the same sized system (6kW) for less than $25k installed.


We are a solar thermal manufacture Solar Collector Inc. a leading to provide solar hot water lease+PPA program for residential and commercial owners. We are interested in Hawaii solar thermal rebate program, please contact us if there is any oppotunities of corperation. Thanks very much.


Where exactly is the actual application for PV rebates if I am a home owner on Maui?


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