Business Details
46 Years
experience
Your Trusted Solar Partner in Hawaii
Grand Solar has been a leader in solar thermal system design, installation, and service in Hawaii since 1980. With over 30 years of operational experience, we specialize in residential and commercial solar solutions, including our proprietary BlazingTubes solar heater. Our commitment to quality is demonstrated through our use of US-manufactured photovoltaic components and industry-leading product warranties. As an A+ rated Better Business Bureau member since 1990, we maintain a strong reputation for fair treatment of clients. Our team, led by original owner John Grandinetti, personally oversees every installation.We actively contribute to community initiatives like the Kahauiki Village homeless shelter project. Our systems are engineered for durability with 25-year design life and minimal maintenance requirements. We offer comprehensive solar technologies including conventional pump systems, thermosyphon systems, and residential PV systems. Our expertise in navigating regulatory requirements and import challenges demonstrates our dedication to advancing solar adoption in Hawaii.
Services
BlazingTubes solar heater
Conventional pump systems
Thermosyphon systems
Residential PV systems
Solar hot water
Details
- Year established: 1980
Highlights and features
- We have over 30 years of solar installation experience in Hawaii
- Original owner personally oversees every installation project
- We use exclusively US-manufactured photovoltaic components
- Maintain A+ Better Business Bureau rating since 1990
- Successfully completed community solar projects for homeless shelters
Associations and certifications
- Better Business Bureau
Services
BlazingTubes solar heater
Our proprietary BlazingTubes system uses advanced vacuum tube technology for efficient water heating. This passive system requires no pumps or controllers, providing reliable hot water with minimal maintenance. Durable construction with aluminum, glass, silicone, and copper components ensures 25-year operational life.
Conventional pump systems
Traditional solar hot water systems using circulation pumps and electronic controllers. These systems actively move water through solar collectors for heating. Offer reliable performance with periodic maintenance requirements.
Thermosyphon systems
Gravity-fed solar water heating systems that naturally circulate water without pumps. Simple design with collector and storage tank configuration provides dependable hot water using natural convection principles.
Residential PV systems
Photovoltaic systems converting sunlight directly into electricity for home use. We use exclusively US-manufactured components with industry-leading performance warranties. Complete installation and service for residential energy independence.
Solar hot water
Comprehensive solar thermal solutions for residential and commercial applications. Includes multiple system types with varying complexity levels to meet diverse hot water needs across different property types.
People
John Grandinetti
Owner
Founder of Grand Solar with over 30 years of solar industry experience. Personally oversees all residential and commercial installations. Committed to advancing solar technology and community solar initiatives.
Questions
What solar technologies do you offer?
We offer BlazingTubes solar heaters, conventional pump systems, thermosyphon systems, and residential PV systems with US-manufactured components.
How long do your solar systems last?
Our systems are designed for 25 years of trouble-free operation with minimal maintenance requirements.
Are your installations completed in one day?
Yes, BlazingTubes installations typically complete within one day, providing hot water from the first night.
Do you provide warranties?
We offer a 10-year manufacturer's warranty on BlazingTubes systems and industry-leading product warranties on PV components.
How are systems sized for homes?
System size depends on household members - typically two BlazingTubes units for families of 3-4 people.
What makes your company different?
We combine 30+ years of local experience with proprietary technology and direct owner involvement in every project.
Reviews (1)
Steph Salgado
Dec 31, 2020
Report
Very dependable, did an amazing job and saved me thousands!! He is your man for solar water heater problems.
