Hawaii’s Trusted Solar Experts on Kauai & Oahu
15+
Years installing hawaii’s solar
500+
Solar projects across hawaii
10K+
solar panels installed
With over 15 years of projects across Oahu and Kauai, we size systems for your roof, usage, and budget. If you’re exploring solar on Kauai or solar on Oahu, our local teams handle site design, permits, installation, interconnection, and ongoing support.
Solar installation on oahu & Kauai
Solar Energy & Roofing Specialists on Kauai & Oahu
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 residential solar on Oahu and Kauai.
Among solar companies on Oahu and Kauai, homeowners choose STI Solar & Roofing for dependable design-build and follow-through—start to finish.
Learn About Our ServicesHawaii solar energy solutions
Solar Energy Services for Oahu & Kauai
Whether you are a homeowner, or business owner, we have the right solar solutions for you.
Past Hawaii solar project stats
Unlocking Independent Energy in Hawaii
STI Solar has installed over 500 PV systems on Oahu and Kauai and each month more and more homeowners choose STI. As one of the largest solar installers on the island, we have many satisfied customers.
STI Solar offers attractive financing for homeowners that need or prefer to finance their system, and we typically install their system in about 4 – 6 weeks. We can reduce your average electric bill by about 35% and with our no money down lease or solar loan the savings start as soon as your system is turned on.
Systems low as $99/month OAC.
Solar Powered Homes
Solar Energy generated
Solar Panels Installed
Financing
We offer the industry’s leading financial options for your PV & battery system or new roof, which include no-money down leases and loans.
Contact UsNeed Help?
Call our friendly staff anytime if you need technical support, or for answers to your solar or financing questions at (808) 664-1052, or text (808) 212-9339.
Submit a Service RequestSolar News & Insight
Read our blog for valuable insights, expert tips, and up-to-date information that can help you stay informed, solve problems, and make better decisions.
Read BlogSolar installation Process
Join our seamless solar journey
Embark on a seamless solar journey with us — a comprehensive process that transforms sunlight and rooftop solar, into sustainably powered homes.
Certified Installation Experts
Customized Designs for Maximum Efficiency
10-Year Performance Warranty
Premium Quality Components
Ongoing Support and Monitoring
End-to-End Support and Customer Satisfaction
Contact UsInitial Consultation and Solar Panel System Design
Product Selection
Installation and Post-Installation Inspection
Utility Interconnection Processing with Hawaiian Electric or KIUC
Monitoring and Performance Optimization
one of hawaii’s top solar companies
Over a Decade of Powering Hawaii with Solar Solutions
STI Solar & Roofing is local contractor specializing in high quality residential solar solutions, solar battery installations and roofing services for residential and commercial customers on the islands of Oahu and Kauai.
Since 2009, STI Solar & Roofing has delivered Hawaii solar energy solutions—PV, solar battery systems, and roofing—for homes and businesses on Oahu and Kauai. Local crews, quality components, and end-to-end service.
Whether we work directly with our customers, or as a subcontractor for a General Contractor, we always strive to full our customers’ unique needs and desires for the best results.
Learn More About UsSolar FAqs
Frequently Asked Questions
How Do I Know If Solar Will Save Me Money?
Before we suggest any type of residential solar project, an STI representative will visit your home for a free consultation to make certain that your investment in renewable energy will benefit you. However, it has been proven for many years that that solar energy will always save you money; it just depends on how much energy you are using and if you install home solar batteries with the system. But in most cases, you will save between 35% and 45% on your energy cost. All STI proposals will come with a cost savings and benefits.
How Much Does Solar Installation Cost?
What our CLIENTS say
Don’t just listen to what we say
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 Southworth
Home owner
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.
DANA RUSSEL
HOME OWNER
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.
STEVE NAFSHUN
HOME OWNER
Residential Solar Service Areas on Oahu
STI Solar proudly installs residential solar panels and batteries across Oahu, serving communities including Honolulu, Kailua, Kapolei, and more.
Contact UsHonolulu, Hi
Kailua, Hi
hawaii kai, Hi
ewa beach, Hi
kapolei, Hi
kaneohe, Hi
pearl city, Hi
aiea, Hi
mililani, Hi
waipahu, Hi
Lihue, Hi
Poipu, Hi
Kapaa, Hi
Eleele, Hi
Koloa, Hi
Anahola, Hi
Kalaheo, Hi
Kilauea, Hi
Waimea, Hi
Hanalei, Hi
Princeville, Hi
Residential Solar Service Areas on Kauai
STI Solar proudly installs residential solar panels and batteries across Kauai, serving communities including Lihue, Kapaa, Princeville, and more.
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