Business Details
49 Years
experience
Your Trusted Solar Partner in Northern California
Suntegrity Solar is a locally owned and operated Sonoma-based company dedicated to delivering high-quality solar energy solutions. Founded in 1977 by father-and-son engineering duo Paul and Keith Kruetzfeldt, we bring decades of technical expertise and hands-on experience to every project. Our mission is to provide trusted advice, innovative solar technology, and exceptional customer service to communities across Sonoma, Napa, and Marin Counties. With over 1,000 installations, we specialize in residential and commercial solar systems, energy storage, and EV charging solutions.As Enphase Platinum and REC Pro Installers, we prioritize aesthetics, quality products, and customized financing. Our in-house team ensures seamless design, permitting, and installation, backed by a 10-year workmanship warranty. A+ BBB-rated and Yelp-acclaimed, we combine engineering precision with a commitment to sustainability and customer satisfaction.
Services
Residential Solar
Commercial Solar
EV Chargers
Energy Storage
Battery Backup
Solar Financing
Off-Grid Systems
Generator Installation
Details
- Year established: 1977
Highlights and features
- Locally owned and operated since 1977 by engineers with 40+ years combined experience
- In-house installation team with no outsourcing or subcontractors
- Over 1,000 solar systems installed across diverse roof types and commercial properties
- Enphase Platinum Installer guaranteeing premium product quality and support
- A+ BBB rating and 5-star Yelp reviews highlighting exceptional customer service
Associations and certifications
- Enphase Platinum Installer
- REC Pro Installer
- BBB A+ rated
What people say
Very professional
Excellent service
No pressure sales
Highly recommended
Outstanding installation
Services
Residential Solar Power
Custom residential solar installations reduce electric bills while increasing property value. Our systems use top-tier components with 25-year warranties. We handle permits, design, and financing, ensuring seamless integration with existing electrical systems. Expertise across all roof types, including challenging installations requiring ground mounts or aesthetic conduit solutions.
Commercial Solar Power
Tailored commercial solar solutions lower operating costs and enhance sustainability profiles. We analyze energy usage patterns to optimize system size and configuration. Services include ballasted roof systems, parking canopies, and integration with EV charging infrastructure. Full-service support covers financing options, tax incentives, and utility interconnection processes.
Energy Storage
Solar-coupled battery storage provides backup power during outages and reduces peak demand charges. We offer lithium-ion and LFP battery options with automatic transfer switches. Systems integrate with existing solar arrays or new installations, supporting partial or whole-home backup capabilities with intelligent energy management features.
Electric Vehicle Chargers
Level II EV charging stations support residential and commercial fleets. Certified ChargePoint installers ensure code-compliant setups with optional billing integration. Chargers seamlessly connect to solar systems, reducing vehicle operating costs while maintaining grid connectivity for supplemental power needs.
Solar Financing
Flexible financing options include PACE programs, credit union loans, and solar-specific financing. We guide clients through tax credit eligibility, ROI projections, and payment structure comparisons. Solutions accommodate homeowners, businesses, and nonprofits seeking to maximize savings without upfront capital expenditure.
People
Paul Kruetzfeldt
Co-Owner & Founder
Electrical Engineering Master from UCLA with 40+ years in construction and solar. Established Kruetzfeldt Construction in 1977 and transitioned to solar specialization in 2009. Oversees technical operations and system design standards.
Keith Kruetzfeldt
Co-Owner & Founder
Mechanical Engineering Master from UC Davis. Former Agilent Engineering Manager with expertise in hybrid vehicle technology. Manages day-to-day operations and client consultations, combining technical knowledge with customer service focus.
Questions
What sets Suntegrity Solar apart from other providers?
We combine engineering expertise with in-house installations, avoiding subcontractors. Our focus on education, customization, and long-term support differentiates us from high-pressure sales-oriented competitors.
Do you handle all aspects of solar installation?
Yes, we manage design, permitting, installation, and utility interconnection. Our certified team maintains quality control throughout the process without outsourcing critical tasks.
How do solar systems perform during power outages?
Standard grid-tied systems require battery backup or generators to operate during outages. We specialize in designing hybrid systems that maintain power for essential circuits when needed.
What financing options are available?
We offer PACE financing, credit union loans, and solar-specific financing programs. Our advisors help clients evaluate tax credits, ROI timelines, and payment structures matching their financial goals.
What warranties do you provide?
We include 25-year equipment warranties, 10-25 year inverter coverage, and a 10-year workmanship warranty protecting against leaks or installation defects.
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