Business Details
46 Years
experience
Your Trusted Partner for Solar Energy Solutions in Hawaii
Grand Solar has been a leader in solar thermal system design, installation, and service in Hawaii since 1980. Our expertise spans nearly every type of solar hot water system available, including our proprietary BlazingTubes technology, which offers 25-year durability with minimal maintenance. As the original owner, John Grandinetti, personally oversees every residential and commercial installation, ensuring quality and adherence to our commitment to excellence. Our US-manufactured photovoltaic components come with industry-leading warranties, reflecting our confidence in product performance.Recognized by the Better Business Bureau with an A+ rating since 1990, we maintain a flawless record with the Regulated Industries Complaint Office. As active members of the Hawaii Solar Energy Association, we combine technical innovation with ethical business practices to deliver reliable solar solutions tailored to Hawaii's unique needs.
Services
Solar Installation
BlazingTubes Systems
Conventional Pump Systems
Thermosyphon Systems
Residential PV Systems
Details
- Year established: 1980
Highlights and features
- We have over 30 years of experience in Hawaii's solar industry.
- Our BlazingTubes technology offers 25 years of trouble-free operation.
- We maintain an A+ rating with the Better Business Bureau since 1990.
- All photovoltaic components are US-manufactured with industry-leading warranties.
- We completed the Kahauiki Village homeless shelter solar project without profit.
Associations and certifications
- Better Business Bureau
What people say
A+ BBB rating
30 years experience
BlazingTubes durability
Community projects
US-made components
Services
BlazingTubes Systems
BlazingTubes solar heaters use vacuum tube technology for 25-year durability with minimal maintenance. These passive systems eliminate pumps and controllers, reducing long-term costs. Installed in one day, they provide up to 90% of household hot water needs while backed by a 10-year manufacturer's warranty.
Residential PV Systems
US-manufactured photovoltaic systems convert sunlight into electricity for homes. Our installations include performance-optimized components with industry-leading warranties. Systems integrate seamlessly with existing electrical infrastructure while reducing utility bills through renewable energy generation.
Commercial Solar Installation
Custom commercial solar solutions reduce operating costs for businesses of all sizes. We design and install systems tailored to energy consumption patterns, maximizing ROI through tax incentives and long-term energy savings while maintaining code compliance.
Thermosyphon Systems
Thermosyphon systems use natural convection for solar water heating without mechanical components. These durable systems feature integrated storage tanks and require minimal maintenance. Ideal for Hawaii's climate, they provide reliable hot water with reduced complexity compared to pumped systems.
Conventional Pump Systems
Pumped solar hot water systems use circulation pumps for optimized heat transfer. Our installations include freeze protection for varied climates. Electronic controllers maximize efficiency while maintaining compatibility with existing water heating infrastructure for hybrid system capabilities.
People
John Grandinetti
Owner
John Grandinetti founded Grand Solar in 1980 and continues to oversee all installations personally. With over 40 years in the solar industry, he combines technical expertise with hands-on management to ensure quality control across every project.
Questions
What solar technologies do you offer?
We provide BlazingTubes systems, conventional pump systems, thermosyphon systems, and residential/commercial photovoltaic installations.
How long do your solar systems last?
BlazingTubes systems last 25 years with minimal maintenance, while PV systems include 10+ year performance warranties on US-made components.
Are you licensed to work in Hawaii?
Yes, we've been operating in Hawaii since 1980 with active membership in the Hawaii Solar Energy Association.
Do you offer financing options?
While not explicitly stated, we can discuss payment arrangements for residential and commercial projects.
How are installations scheduled?
BlazingTubes installations typically complete in one day, with system sizing determined by household occupancy requirements.
What warranties do you provide?
We offer 10-year manufacturer warranties on BlazingTubes systems and industry-leading performance guarantees on PV components.
