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Sierra Roofing And Solar vs Power On Solar
Alameda Solar Contractors Comparison · Updated March 2026
Sierra Roofing And Solar brings 22 years of roofing expertise and strong service reputation, while Power On Solar specializes solely in solar but faces recurring service responsiveness concerns.
| Sierra Roofing And Solar | Power On Solar | |
|---|---|---|
| Rating | ★ 4.8 | ★ 2.9 |
| Years Licensed | 22 years | 7 years |
| License # | 835854 | 1052317 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | Dublin, CA | Dublin, CA |
| Website | www.sierraroofing.com | poweronsolar.com |
Key Differences
What Customers Say
Sierra Roofing And Solar
Customers consistently highlight thorough inspections, clear explanations throughout the project, professional communication, and clean jobsite practices from estimate through completion.
Power On Solar
Customers report smooth installation processes with clear option explanations, but multiple reviews describe significant difficulty reaching the company for post-installation service and repairs, with extended resolution timelines.
Key Takeaway: Sierra demonstrates strong communication and responsiveness throughout projects, while Power On Solar shows a notable gap between positive installation experiences and challenging post-installation service access.
Customer Reviews
Sierra Roofing And Solar
Excellent workmanship. They had exactly the materials we wanted for our roof. We're very considerate and, all things considered, quiet. Did an excellent job of cleaning up after they had left. Great f...
Robert was prompt and professional. Explained clearly what he found to be the cause of the leak and how to fix it. He gave me recommendations on maintenance for my ceramic tile roof but I never felt p...
Robert did a great job getting here on time and checking out my roofing issues
Power On Solar
This company is Simply.The.Best. From start to finish. They care, they want to do things well, and they handle the whole process, from soup to nuts, smoothly. And they are human beings with dedicat...
Making a decision about solar is difficult and complicated. There is a lot at stake considering the system will last for decades and is not inexpensive no matter how it is funded. Power On solar was...
Made the Solar process of choosing and installing a very easy choice to use their service. All steps were explained and questions fully answered. Our system is producing as promised and savings us eac...
Consider Sierra Roofing And Solar if...
- ✓ Your solar project involves roof work, replacement, or structural concerns that require integrated roofing and solar expertise under one contractor
- ✓ You're installing solar on an older roof where leak history, hidden damage, or tile/metal roofing complications may emerge during installation
- ✓ Ongoing communication and post-project responsiveness matter significantly to you, especially for a long-term investment like solar
- ✓ You want a contractor with two decades of navigating permitting, structural issues, and weather-related complications in the Bay Area
Consider Power On Solar if...
- ✓ Your roof is newer, structurally sound, and you need only solar panel installation without roofing concerns
- ✓ You're specifically seeking SunPower or Enphase systems and want a contractor focused exclusively on solar technology
- ✓ You have alternative service resources or extended manufacturer warranties that reduce dependence on contractor responsiveness for repairs
- ✓ The installation phase matters more to your decision than post-installation service access, and you're comfortable managing potential service delays
Questions to Ask Before Hiring
- → Ask Power On Solar directly how they handle service calls after installation, typical response times for system issues, and whether they assign a dedicated service contact
- → Ask Sierra Roofing And Solar about their solar service capabilities, whether they maintain inventory for common solar repairs, and how they handle warranty claims for solar components
- → Request references from both companies specifically for solar installations completed 2-3 years ago, and ask those customers about their post-installation service experiences
- → Confirm warranty coverage details: what the installer covers versus manufacturer warranties, and how long each company commits to servicing your system
The Bottom Line
If your project involves any roofing work or concerns about roof condition, or if reliable post-installation service access matters significantly to you, Sierra Roofing And Solar is the stronger choice with 22 years of experience and consistent communication feedback. Their integrated roofing-solar expertise reduces coordination risk and provides a single point of accountability. Choose Power On Solar only if your roof is newer and structurally sound, you're specifically seeking their SunPower or Enphase partnerships, and you have backup service options or are comfortable with the documented service responsiveness challenges. For most homeowners making a decades-long solar investment, Sierra's veteran experience and communication track record outweigh Power On Solar's specialization, particularly given the recurring service concerns.
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Frequently Asked Questions
Sierra has 22 years handling roofing-solar integration, which matters significantly for installation quality and leak prevention. However, the review data shows limited feedback on their long-term solar service capabilities. Ask them directly about solar repair inventory, technician training on Enphase or SunPower systems, and how many solar service calls they handle monthly.
Multiple customers report difficulty reaching the company for post-installation issues, with some describing extended repair timelines for non-responsive panels and connectivity problems. This pattern is notable because solar systems require 20-25 years of performance. If you choose Power On Solar, confirm their current service protocols in writing and ensure manufacturer warranties provide direct support options.
Sierra Roofing And Solar is the clear choice for projects requiring roof repair or replacement before solar. Their 22 years of roofing experience means they can diagnose structural issues, handle leak-prone areas, and coordinate the roof-solar timeline under one contract. Power On Solar would require you to hire a separate roofer first.
For a simple installation on a newer roof, the gap matters less during installation but becomes relevant for service. Sierra's 22 years means more exposure to long-term system issues and complications. Power On Solar's 7 years is still experienced, but the service responsiveness pattern suggests their post-installation support infrastructure may not match their installation capabilities.
Looking for the Best?
See our ranked list of top solar contractors in Alameda.
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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 11, 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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