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Calpro Solar vs High Definition Solar
Contra Costa Solar Contractors Comparison · Updated March 2026
Calpro Solar brings 37 years of experience versus High Definition Solar's 16 years, with the primary difference being longevity and service scope.
| Calpro Solar | High Definition Solar | |
|---|---|---|
| Rating | ★ 5.0 | ★ 4.1 |
| Years Licensed | 37 years | 16 years |
| License # | 549715 | 949189 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | Brentwood, CA | Concord, CA |
| Website | calprosolar.com | highdefinitionsolar.com |
Key Differences
What Customers Say
Calpro Solar
Customers consistently praise Calpro Solar for no-pressure consultations, clear communication from office staff throughout the process, and responsive post-installation service when issues arise.
High Definition Solar
Customers highlight High Definition Solar's professional crews, thorough system explanations, rapid single-day installations, and willingness to maintain service relationships for systems installed years ago, though some note communication challenges emerged later.
Key Takeaway: Calpro Solar receives specific praise for post-installation responsiveness, while High Definition Solar demonstrates long-term customer relationships but with some reports of service communication difficulties years after installation.
Customer Reviews
Calpro Solar
Very great full to George and his family for quick response and taking care of the issue with my Solar. He had installed Solar with backup battery two years ago through Sungrade based out of Walnut Cr...
To all of you out there considering various solar companies, I had the good fortunate to work with CalPro Solar. Prior working with them, I went through several other solar providers. Each one had the...
Super professional and friendly people doing great work. It has been a pleasure working with them.
High Definition Solar
Super effort to install my job on the scheduled day. The crew arrived at exactly 8:oo AM as promised and were completely finished at 2:00 pm. Everything worked! The crew was very professional. I aam ...
Quick response, took time to explain the process and were able to process everything on time. It went smoothly. Jairo was super helpful and patient!
We had HD Solar do a big install for us in Richmond California. They did a great job, very professional, and we love saving huge amounts of money of electricity now! Plus, no more power outages due to...
Consider Calpro Solar if...
- ✓ You prioritize working with the most established contractor available and value 37 years of proven business continuity for long-term warranty confidence.
- ✓ Communication throughout your project is a high priority, as customers specifically note Calpro's office staff explains procedures clearly and answers questions thoroughly.
- ✓ You want a solar-focused specialist rather than a company splitting attention between multiple service lines.
- ✓ Post-installation responsiveness matters to you, as Calpro receives specific praise for timely assistance with system issues after completion.
Consider High Definition Solar if...
- ✓ Your roof may need replacement or repair before solar installation, as High Definition offers both services and can coordinate the work under one contractor.
- ✓ You prefer rapid project completion, with customers documenting single-day installations rather than multi-day schedules.
- ✓ You want a contractor demonstrating willingness to service systems long-term, with documented customer relationships and repairs on systems installed over a decade ago.
- ✓ You're considering future panel expansion or system modifications, as High Definition has documented experience with adding capacity to existing installations.
Questions to Ask Before Hiring
- → Ask Calpro Solar whether they coordinate roof repairs if issues are discovered during inspection, or if you'll need to hire a separate roofing contractor.
- → Ask High Definition Solar about their service department structure and guaranteed response times for post-installation issues, given some customers noted communication challenges years after installation.
- → Ask both companies for references from installations completed 5-10 years ago to verify long-term business relationships and system performance.
- → Ask about crew stability and whether the installation team is direct employees or subcontractors, as this affects quality consistency.
The Bottom Line
Calpro Solar holds a clear advantage in operational longevity with 37 years versus 16, which translates to greater confidence they'll be available for warranty service decades from now and more experience handling installation complications on older homes. Their customer feedback specifically highlights communication and post-installation responsiveness as strengths. Choose High Definition Solar if your roof needs work before solar installation and you want one contractor handling both, or if rapid single-day completion is a priority. For most straightforward solar installations where the roof is sound, Calpro Solar's additional two decades of business continuity and stronger service responsiveness feedback make them the safer choice for a long-term investment.
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Frequently Asked Questions
Yes, particularly for warranty confidence and handling complications. Calpro Solar has demonstrated business continuity through nearly four decades, meaning they're more likely to still be operating in 15-20 years when you might need warranty service. Their longer history also means experience with older roof types and adapting to regulatory changes that newer companies haven't navigated.
If your roof needs work before solar installation, having one contractor coordinate both eliminates scheduling conflicts and clarifies warranty responsibility. However, if your roof is in good condition, this dual capability offers no advantage. Ask Calpro Solar whether they partner with specific roofers if inspection reveals issues.
The data shows mixed signals: Calpro receives specific praise for responsive post-installation service, while High Definition documents customer relationships spanning over a decade but some customers reported communication challenges years later. Ask both companies about their service department structure and response time guarantees for post-installation issues.
Single-day completion suggests efficient crew coordination and may indicate larger installation teams. This isn't necessarily better or worse—Calpro's emphasis on communication and scheduled completion may involve more thorough explanation time. Ask each company about their typical installation timeline and what factors might extend it for your specific project.
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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 13, 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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