Federal credit ended
The 30% federal residential clean energy credit (Section 25D) isn't allowed for expenditures made after December 31, 2025. The IRS treats an expenditure as made when installation is complete.
Source: IRSImportant Hawaiʻi Solar Tax Credit Update
Storm Preparedness
Locally owned solar, battery, and energy services since 1993
Power Your Hawaii Home with Solar, Battery Backup, and Energy Independence
Since 1993, Alternate Energy Hawaii has helped local families and businesses lower electric bills, add battery storage, and build reliable energy systems designed for island life.
(808) 842-5853 Pearl City, Oahu based • Hawaii license C-26041
- Locally owned since 1993
- 59+ MW installed
- Licensed Hawaii contractor C-26041
- Tesla Premier Installer
- Pearl City, Oahu based
Locally Owned Since 1993
Powering Hawaii’s Future with Residential Solar and Sustainable Energy
For over 30 years, Alternate Energy has helped Hawaii families and businesses embrace sustainable energy solutions with solar, HVAC, roofing, EV charging, and more—all installed by our in-house team. From photovoltaic panels delivering clean electricity to advanced rooftop energy systems designed for residential solar projects, discover why we’re consistently voted Oahu’s best in solar, air conditioning, and plumbing.
Alternate Energy
Built for Every Home & Business
Residential and Commercial Solar Solutions That Fit Your Needs
We offer premium service combined with premium products designed to maximize solar efficiency and deliver reliable clean electricity. Whether you’re exploring residential solar or large-scale commercial solar projects, our tailored approach ensures you get the most value from your investment. With flexible solar financing options, achieving long-term savings and sustainability has never been easier.
Photovoltaic
Federal and Hawaiʻi solar incentives may help reduce the cost of photovoltaic systems, but incentive programs and eligibility requirements can change over time. Alternate Energy Hawaii recommends consulting a qualified tax professional regarding your specific situation.
PV + Storage Solutions
Capture excess power, store it onsite and have it delivered when you need it, without exporting to the grid.
Energy Efficient Air Conditioning Hawaii | Save Power
Mitsubishi Split Ductless AC systems are up to 40% more efficient than traditional HVAC systems.
Solar Water Heating
In Hawaii, up to 40% of the average family’s electric bill goes toward heating water.
Electrical Services
Let our in-house team of licensed electrical journeymen handle your next repair or renovation.
Roofing
We are a certified 5-Star CertainTeed installer!
Electric Vehicle Charging
Let AEI's experienced electrical journeymen install your EV charging station.
Free Quote
Find out how much you can save with solar — no pressure, no commitment. Get free quote
Trusted by Local Families
At Alternate Energy, customer satisfaction is at the heart of everything we do. Read real stories from homeowners who trusted us for their solar, PV, and AC needs — and see the difference quality service, expert installation, and great value can make.
See all stories Trusted & Certified
Our Accreditations and Industry Partnerships
How do you choose among solar companies in Hawaii?
There's no single best solar company in Hawaii, because the right installer depends on your roof, your Hawaiian Electric rate and program, and your budget. Start with three checks: a Hawaii contractor license, a BBB profile you can read, and years of local installs you can ask about. Alternate Energy Hawaii has all three, so compare us with at least two others. Our guide to how to compare solar companies in Hawaii lists the questions to ask.
2026 incentive update
Read the 2026 incentive guideWhat changed for Hawaii solar incentives in 2026?
State credit capped
Act 24 (SB 3125), signed May 21, 2026, puts a $40 million annual cap on Hawaii's Renewable Energy Technologies Income Tax Credit and ends the credit after the 2029 tax year.
Source: Act 242026 systems
Executive Order 26-02 (signed June 8, 2026) and TIR 2026-02 explain the cap exemption. Systems placed in service before May 21, 2026 are exempt; others may qualify through certification.
Source: TIR 2026-02Battery incentive
Hawaiian Electric's BYOD Plus pays $400 per kW of committed battery capacity upfront for new batteries paired with solar, plus $400 per kW for qualifying low- to moderate-income customers.
Source: Hawaiian ElectricEvery household's tax situation is different, so check your eligibility with a tax professional.
Proof you can verify
What can you check before you hire us?
- C-26041
Licensed
Hawaii contractor license C-26041. Look it up with the state’s professional and vocational licensing search.
- A+
BBB accredited, A+
Accredited since October 20, 2010.
- 2023
Tesla Premier Installer
Named a Tesla Premier Installer in December 2023.
- 168
Reviews on Yelp
168 reviews, as listed in August 2026.
- 59MW+
Local since 1993
According to AEI, we have installed over 59 MW of Mitsubishi Electric solar panels since 2011, powering 10,000 homes.
- 1993
Customer stories
Hear from Oʻahu families who went solar with us.
Customer stories
See all customer storiesWhat do Oʻahu customers say?
We wanted to get our electricity from the sun, not the electric company. Jeff Lee was professional, straightforward, and still answered our questions months after the install. Our electric bill has gone way down, and we've been recommending AEI to all our friends.
The Lee FamilyFull reviewAs a former contractor, I appreciated that AEI focused on product quality, not just financing. Jeff Lum was informative and professional, and the installation went perfectly. With my condition, we rely on AC every day, so saving on our bill has made a real difference.
The Antonio FamilyFull reviewEven with the AC running all day and night, our electric bill went down. Roy was incredibly responsive. It didn't feel like talking to a sales rep, it felt like talking to family.
The Matsumoto FamilyFull reviewWe had a great experience with AEI. Dave Thompson helped us understand our options, the tax credits, and the whole installation process. We went with AEI because everything, panels and all, was Mitsubishi. We've already referred four friends.
The Benros FamilyFull reviewAEI made everything simple and easy to understand. Our monthly bill dropped, and I was so impressed I recommended them to my parents. We're already planning to add more panels.
The Adams FamilyFull reviewOur electric bill dropped, even after adding two AC units. Thanks to AEI and Roy's help, we finally had the freedom to enjoy things like paddle boarding as a family.
The Vaeena FamilyFull reviewPlan your project with a local team
Every recommendation starts with your roof, your Hawaiian Electric account and what you want the system to do.
Trusted & certified
Our accreditations and industry partnerships
Hawaii contractor license C-26041, BBB accredited with an A+ rating, and certified by the manufacturers whose equipment we install.
Read our BBB profile →Free estimate
Get a free solar estimate on Oʻahu
Tell us about your home or business, your electric bill and whether you want battery backup. We'll recommend a system for your roof and give you a written estimate.
One local team since 1993
Get a free estimateWhat does Alternate Energy Hawaii install?
Our own crews handle every part of the job, so solar, batteries, roofing, electrical and AC are planned together instead of by separate contractors.
Solar panels for Oʻahu homes
Mitsubishi Electric panels, system sizing and inverter choices for your roof.
Learn more →Battery storage and backup power
Keep essential circuits running in an outage, and see whether BYOD Plus fits.
Learn more →Tesla Powerwall
Powerwall installs from a Tesla Premier Installer.
Learn more →Solar water heating
Cut the cost of hot water with a system built for Hawaii.
Learn more →Energy-efficient air conditioning
Mitsubishi split ductless AC, installed by our own team.
Learn more →Roofing
CertainTeed 5-Star installer, so the roof is ready before the panels go up.
Learn more →Electrical and EV charging
Licensed electricians for panel upgrades, repairs and home EV chargers.
Learn more →Commercial solar
Solar and storage for Oʻahu offices, shops and other business roofs.
Learn more →Built for Hawaii Since 1993
Why Choose Alternate Energy Hawaii?
AEI brings solar, battery storage, roofing, electrical, AC, and EV charging together under one local team, so your energy project can be planned around Hawaii utility rates, HECO requirements, roof readiness, and long-term island support.
One in-house energy team
Solar, batteries, roofing, electrical, AC, and EV charging work together. AEI helps homeowners and businesses avoid disconnected decisions by planning the whole energy system.
Designed for island outages
Battery backup and energy independence planning help Hawaii families decide what should stay powered when the grid is down, from refrigeration and lighting to critical home circuits.
Local support after installation
After installation, local support matters. AEI helps customers understand monitoring, maintenance, battery settings, and next steps if equipment needs attention.
Financing and incentive guidance
Solar incentives, tax credits, HECO programs, and financing options can change. AEI helps customers compare practical paths before committing to a system design.
Buyer Confidence
Questions to Ask Before Choosing a Solar Company
How does AEI support customers after installation?
AEI provides local support for system questions, monitoring concerns, maintenance direction, and future upgrades. A solar project should not end when the panels turn on, especially in Hawaii where batteries, HECO programs, and utility rules can affect long-term performance.
What happens if solar monitoring stops reporting?
Monitoring interruptions can come from internet changes, equipment communication issues, or inverter/battery settings. AEI customers can contact support so the team can help identify whether the issue is connectivity, settings, or equipment that needs service.
How do I know if my roof is ready for solar?
A solar-ready roof should have enough remaining life, clear usable space, and a structure suited for the proposed system. AEI can evaluate roof readiness and connect solar planning with roofing and electrical considerations before installation.
Should I add battery storage now or later?
Battery timing depends on outage concerns, budget, HECO program availability, and how much backup power you want. Some homes benefit from designing solar and battery together, while others may plan battery readiness for a future phase.
What makes a local Hawaii installer different?
A local installer understands island weather, utility requirements, roof conditions, permitting timelines, and local support expectations. Those details matter when comparing a Hawaii-based energy team with a national sales-first provider.
How do permits and HECO interconnection work?
Solar projects typically require design review, permitting, utility coordination, and inspection before final operation. Timelines can vary by project and program, so customers should ask each installer how they manage permitting and HECO interconnection steps.