Compare Local Pros
Clean Solar vs GAF Energy
Santa Clara Solar Contractors Comparison · Updated March 2026
Clean Solar brings 18 years of experience with consistent customer service, while GAF Energy offers specialized solar shingle integration but faces post-installation support challenges.
| Clean Solar | GAF Energy | |
|---|---|---|
| Rating | ★ 4.5 | ★ 2.5 |
| Years Licensed | 18 years | 6 years |
| License # | 910849 | 1062345 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | San Jose, CA | San Jose, CA |
| Website | www.cleansolar.com | www.gaf.energy |
Key Differences
What Customers Say
Clean Solar
Customers consistently praise thorough communication, patient technical explanations, and responsive support throughout all project phases including post-installation.
GAF Energy
Customers report professional installation work but frequently describe post-installation communication challenges and delays in system activation and troubleshooting support.
Key Takeaway: Clean Solar maintains consistent customer service through completion and activation, while GAF Energy's service quality drops significantly after physical installation is finished.
Customer Reviews
Clean Solar
Support group was very resonsive to my questions within hours. Great to have knowegeable help when it's needed.
Project: add whole-house battery backup to a 20 year-old home with existing solar PV system. I had three goals: 1. Load shifting (provide electricity during peak energy charges) 2. Provide backup pow...
My husband and I had a terrific and lengthy phone experience where Art explained in depth about solar panels and batteries. He was patient in answering all our questions and very generous with his t...
GAF Energy
Overall, a good experience if you go in with measured expectations. The process from signing the agreement to PTO is a long one, but the work was done professionally, and so far production is exceedin...
We are sharing a photo of the front view of our house and a close up view of the solar roof in this review. The solar roof is fully functional and looks elegant. Best of all, we had GAF Energy as th...
GAF team is great! The project manager Aidan is professional and efficient. He always answered our questions/concerns promptly. We are glad to choose GAF solar roof.
Consider Clean Solar if...
- ✓ Your priority is responsive communication and customer service throughout the project, particularly if you're new to solar and need patient explanations of technical details.
- ✓ You want traditional solar panels or Tesla Powerwall battery systems rather than integrated solar shingles, playing to Clean Solar's core expertise.
- ✓ You're adding to an existing solar system or need troubleshooting support, where 18 years of experience diagnosing issues provides meaningful value.
- ✓ You value a proven track record with customers specifically praising post-installation responsiveness, not just installation quality.
Consider GAF Energy if...
- ✓ You specifically want solar shingle technology integrated into a roof replacement, which is GAF Energy's specialized focus and Clean Solar doesn't appear to offer.
- ✓ You're comfortable being proactive about following up on activation timelines and utility coordination rather than expecting the contractor to drive the process.
- ✓ Your timeline can accommodate potentially longer activation periods after physical installation is complete.
- ✓ You have a straightforward installation without complications where professional installation teams can execute efficiently.
Questions to Ask Before Hiring
- → For GAF Energy specifically: Ask who will be your point of contact after installation and what their typical response time is for activation issues. Request references from customers who can speak to post-installation support, not just installation quality.
- → For either company: Ask for a detailed timeline from contract signing through utility activation, including who handles each coordination step with the utility company and building department.
- → Ask Clean Solar if they offer solar shingle installations or only traditional panels, and whether their experience includes projects similar to what you're planning.
- → Request both companies explain exactly what happens if your system doesn't activate on schedule or needs troubleshooting after installation is complete.
The Bottom Line
For most San Jose homeowners, Clean Solar is the stronger choice based on proven experience and consistent customer service throughout the entire project lifecycle. Their 18 years of field experience, thorough communication, and reliable post-installation support address the complete solar installation experience, not just the physical installation. Choose Clean Solar unless you specifically want solar shingle technology integrated into a roof replacement, which is GAF Energy's specialty. If you do choose GAF Energy for solar shingles, go in with eyes open about their post-installation support challenges and be prepared to drive the activation process yourself rather than relying on them to manage it proactively.
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Frequently Asked Questions
Yes, particularly when complications arise. Clean Solar's 18 years means they've encountered rare roof conditions, legacy electrical systems, and permitting issues that a 6-year contractor simply hasn't seen yet. This experience shows in customer feedback where Clean Solar receives consistent praise for thorough planning and problem-solving, while GAF Energy's challenges appear in the post-installation phase where experience matters most. For straightforward installations, the gap matters less, but few homeowners know in advance whether their project will be straightforward.
Yes, this is a legitimate concern that appears repeatedly in customer feedback. Solar systems aren't functional until they're activated by the utility and properly connected, which can require troubleshooting and coordination. Multiple customers report difficulty reaching GAF Energy during this critical phase. If you choose GAF Energy, plan to be proactive about following up and confirm upfront who will handle activation issues and their guaranteed response time.
Solar shingles offer aesthetic advantages by integrating into your roof rather than mounting on top, but they're not objectively better for everyone. They typically cost more, may produce slightly less power per square foot, and require more complex installation coordination. The technology choice depends on your priorities. If you specifically want solar shingles and are replacing your roof anyway, GAF Energy specializes in this. If you want traditional panels or battery systems, Clean Solar's broader experience and consistent customer service make them the stronger choice.
The bond and insurance are identical, meeting California's basic requirements. The meaningful difference is in how long each has operated under these protections. Clean Solar's 18-year history means they've maintained their license, bond, and insurance through multiple renewal cycles and market changes, demonstrating sustained compliance. GAF Energy's 6-year record is shorter but still shows established operation beyond a startup phase. Both provide adequate legal protection; the experience difference matters more for project execution than contractor protections.
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See our ranked list of top solar contractors in Santa Clara.
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How We Compare Contractors
License Verification
All license data is sourced from official California CSLB records and verified regularly.
Review Analysis
Customer reviews are aggregated from Google and analyzed to identify patterns in service quality.
Detailed Comparison
We analyze credentials, insurance, experience, and feedback to highlight meaningful differences.
Not all licensed contractors are created equal. While a valid license is the baseline requirement in California, contractors can vary significantly in experience, insurance coverage, and customer satisfaction.
- Experience matters: A contractor with 15+ years of experience has likely encountered and solved problems that newer contractors haven't faced yet.
- Workers' compensation protects you: If a contractor without workers' comp insurance has an employee injured on your property, you could be held liable.
- Reviews reveal patterns: Individual reviews can be misleading, but patterns across many reviews often reveal a contractor's true strengths and weaknesses.
- Bond amounts vary: A contractor's bond provides financial protection if they fail to complete work as agreed. Higher bonds offer more protection.
Taking time to compare contractors on these factors can save you from costly mistakes and help ensure your project is completed by a qualified professional.
Data Sources: License information from California CSLB. Ratings and reviews from Google. Last verified March 12, 2026.
This comparison is based on publicly available information. We recommend getting multiple quotes and verifying all credentials directly before hiring.
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