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.
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
You can claim up to 65% of your total photovoltaic system cost by utilizing State of Hawaii and federal tax credits.
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.
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Photovoltaic
The Lee Family
Nuuanu
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. Now our bill is down to just $18 a month—we’ve been recommending AEI to all our friends.
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Photovoltaic
The Antonio Family
Ewa Beach
As 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.
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Energy Efficient Air Conditioning Hawaii | Save Power
The Matsumoto Family
Kapolei
Even 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.
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Photovoltaic
The Benros Family
Ewa Beach
We 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.
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Photovoltaic
The Adams Family
Waialua
AEI made everything simple and easy to understand. Our bill dropped from $600 to $200 a month, and I was so impressed I recommended them to my parents. We’re already planning to add more panels.
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Photovoltaic
The Vaeena Family
Honolulu
Our electric bill dropped from over $200 to just $18 a month—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.
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Community & Innovation
See What’s Powering the Change
Trusted & Certified
Our Accreditations and Industry Partnerships
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.
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.