Solar Done Right



Hotels, Timeshares, Condos, and Commercial Buildings



Quality, Hassle-Free Roof Replacements and Insurance Claims



Residential, Commercial, Resorts, and Hotels

Solar Done Right Since 2009

Solar Energy, Roofing & Air Conditioning Specialists on Kauai & Oahu

STI Solar Roofing & Air Conditioning is a local company that specializes in professional installation services for residential and commercial solar energy systems, roofing, and air conditioning. With a focus on continuous training and customer service, we bring affordable, high-quality products and services to our customers.
With an STI Solar Energy System, homeowners can save thousands and take control of their energy needs. Our mission is to provide electricity at the lowest possible cost through systems that are designed and installed to generate the most power per panel. With lower installation costs, strong government incentives, increasing energy costs, and our solar financing programs, you can now take charge of your energy needs. STI Solar makes it affordable and easier than ever to make the switch to solar energy for your home.

Solar Photovoltaic (PV) Systems

STI Solar has installed over 350 PV systems in Hawaii and each month more and more homeowners choose STI Solar. Get in touch with us and see why our value pricing, professional installers and experience makes us the smart choice for your new solar PV system.

Energy Storage

Power outages are common in Hawaii and some last over 6 hours and even days. Even if you have a solar PV system, you’ll be in the dark unless you have battery storage. Today batteries are also for self-supply which saves you even more money.

Solar Hot Water

In Hawaii, heating water accounts for a large proportion of energy costs and uses more energy than most appliances in the home. With generous tax incentives, the cost is even less than a traditional hot water system.

Solar Split Air Conditioning & Attic Fans

Whether you choose our Hybrid Solar Split AC System that is powered by the sun, or the world’s best-selling Daikin Split AC System we can cool individual spaces with ease!

Expert Roofing Services

Your roof needs to be replaced on average every 20 years. In Hawaii, we have extreme elements like constant wind and rain that can decrease its useful life.

We offer $0 Money Down for all of our services!

We offer the industry’s leading financial options for your solar + storage system, air conditioners and a new roof including leases, loans, and PPAs.


Certification for Solar Installers

STI Solar, a division of the Solar Training Institute, is the ONLY full-service solar company in Hawaii whose installation teams are professionally trained and at least one solar technician is NABCEP certified. According to the NABCEP website:
“NABCEP Board Certifications ensure you have the knowledge and skills to meet the demands of renewable energy projects and employers across the world. Developed by subject matter experts for industry professionals, our U.S.-based certifications are built on rigorous standards and ongoing research to meet the real-world needs of customers, businesses, utility companies, and governmental organizations. With a NABCEP Board Certification attached to your name, you can work in the renewable energy industry anywhere around the globe.”
Most solar companies hire people without experience and train them “on the roof.” STI Solar has organized, certified training of our solar workers that ensures a better product, and a safer and more reliable installation of your PV system.

Get Your Free Quote Today

    00:06 29 Jun 22
    Awesome experience working with STI Solar Hawaii, they installed Solar PV, AC, and battery backup. The installation went very smoothly and work was high quality, no issues after installing. For Oahu residents I would definitely recommend their services!
    June G.June G.
    19:35 24 May 22
    I stopped by the condo late afternoon after the install was completed, when the condo is usually getting quite hot - and boy, does the attic fan help! Looks great, and is also so quiet. Thank you for a job well done, and for being so conscientious about making sure it was going to be a good fit for that location and also that I was aware of the potential drawbacks. Much appreciated!
    Steve NafshunSteve Nafshun
    05:43 19 May 22
    STI Solar put together an Enphase off grid system for my tiny home on the island of Kauai.Devin and Chris from STI answered all my questions and concerns about my system.Matt & Graham from STI Solar/Kauai installed it and walked me through the instructions and the phone app. They were professional and got the job done. The Enphase system is awesome and meeting all of my power needs.I would highly recommend them.Thank you STI Solar, Roofing & Air conditioning.Steve
    Todd SouthworthTodd Southworth
    00:55 12 May 22
    STI was absolutely fantastic!! Graham came out on time and was a great help. He was very personable and at the same time he was very professional. Graham was super helpful with different opinions I should consider but was in no way pushy.My phone calls to STI were answered promptly.STI is the real deal!!Todd
    Bizcut CBizcut C
    07:02 31 Mar 22
    dana russelldana russell
    17:23 23 Dec 20
    I love my solar and power wall!! Chris was wonderful to work with. He immediately addressed our concerns and was always available to answer questions. It is because of him I give this company 5 stars.
    nathon moorenathon moore
    07:42 24 Jan 18

    Why choose STI? 

    STI Solar has been doing business with homeowners and business owners in Hawaii since 2010.


    Our customers get top-tier solar equipment and materials that offer the longest warranties. And our overall cost to you is typically more affordable that other solar companies with even higher quality installation and service.


    STI started as a solar training institute in 2009, and today our technicians are the best trained installers in Hawaii with the highest certifications in the industry.


    We make it easy to go solar! Our solar consultants are the best trained in the industry and will guide you through the process including financing, installation, warranties and of course all the equipment you’ll be buying.


    We make it convenient for you by listening to your questions and concerns, working around your schedule and providing you with copies of all the documentation, warranties and tax credit forms.


    We show up on time at your convenience! That’s important, especially these days when most cable and telephone companies give you a 3 - 4 hour window when they show up to your home.


    Finally, our friendly, certified skilled technicians love what they do and it shows when you work with them. We get many complements from our customers about our installers and they often recommend us to their friends and Ohana.


    So give us a call today at 808-664-1052 and you’ll feel the difference!