Compare Local Pros
Corda Solar vs High Definition Solar
Contra Costa Solar Contractors Comparison · Updated March 2026
High Definition Solar brings seven additional years of experience and documented long-term customer relationships spanning over a decade.
| Corda Solar | High Definition Solar | |
|---|---|---|
| Rating | ★ 5.0 | ★ 4.1 |
| Years Licensed | 9 years | 16 years |
| License # | 1019424 | 949189 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | Danville, CA | Concord, CA |
| Website | www.cordasolar.com | highdefinitionsolar.com |
Key Differences
What Customers Say
Corda Solar
Corda Solar customers emphasize technical competence for complex installations, competitive pricing, and seamless project execution with responsive communication throughout the process.
High Definition Solar
High Definition Solar customers highlight professional, no-pressure sales consultations, right-sized system recommendations based on actual usage, and long-term service relationships spanning multiple years.
Key Takeaway: Corda Solar receives feedback focused on technical expertise and value pricing for complicated projects, while High Definition Solar's reviews emphasize consultative sales approach and documented ongoing support for systems installed as far back as 2012.
Customer Reviews
Corda Solar
We recently had two Tesla Powerwall 3 units installed by Corda Solar in Danville, and we couldn’t be happier with the entire experience! From start to finish, everything went seamlessly, with no sur...
Great company to do business with. Nathan and his team of installers were very knowledgeable and answered any questions I had. They are local here in Danville Ca. and could not have done a better jo...
Got solar 8 years ago. Same people in business. Returns phone call and emails.
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 Corda Solar if...
- ✓ Your project involves specialized roofing configurations like Cal-pac or complex multi-module panel arrangements requiring technical expertise in non-standard installations
- ✓ You prioritize working with a locally-focused Danville contractor who maintains direct community presence rather than a broader regional operation
- ✓ Competitive pricing is a primary concern and you want a company customers specifically mention for cost-effectiveness
- ✓ You're installing Tesla Powerwall battery storage and want a contractor with documented experience in these specific systems
Consider High Definition Solar if...
- ✓ You value working with a veteran contractor who has maintained service relationships spanning over a decade and can demonstrate long-term system support
- ✓ Your project may require both roofing work and solar installation, and you prefer coordinating through a single contractor with documented capabilities in both areas
- ✓ You want a company with documented experience through multiple technology generations, including inverter replacements and system expansions years after initial installation
- ✓ You prefer a no-pressure sales approach with system sizing based on actual usage data rather than maximizing panel count, which customers specifically highlight about this company
Questions to Ask Before Hiring
- → Ask High Definition Solar about their current service response protocols, specifically how they've addressed the communication challenges some customers experienced years after installation
- → Ask Corda Solar for references from customers whose systems have been operating for 5+ years to understand their long-term service track record
- → If your roof needs work, ask both companies how they coordinate roofing and solar work, and ask High Definition Solar about their specific roofing capabilities and crew qualifications
- → Ask both contractors about their warranty service procedures and what happens if components fail 8-10 years from now
The Bottom Line
High Definition Solar's 16-year track record and documented service relationships spanning over a decade make it the safer choice for most homeowners prioritizing long-term support and business stability, particularly if your project involves both roofing and solar work. Their veteran status means proven capability navigating technology changes and maintaining customer relationships through equipment lifecycles. Choose Corda Solar if your project involves specialized roofing configurations or complex multi-module installations where their documented technical expertise and competitive pricing provide specific advantages. Either contractor provides proper insurance and bonding, but if you're investing in a 25-year solar system and want confidence your installer will still be responsive in 2035, High Definition Solar's longer operational history provides stronger evidence of that commitment.
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Frequently Asked Questions
Yes, particularly for long-term support. High Definition Solar has documented relationships with customers going back to 2012, meaning they've handled inverter failures, warranty claims, and technology upgrades through multiple equipment generations. A 16-year contractor has also weathered industry consolidation and the exit of numerous solar companies, demonstrating business stability. For a 25-year investment like solar panels, this track record provides more confidence in ongoing service availability.
High Definition Solar offers documented dual capabilities in both solar and roofing, with customers mentioning roof replacements and leak repairs alongside solar installations. This can streamline scheduling and accountability since one company handles both aspects. Corda Solar specializes specifically in solar with expertise in particular roofing types like Cal-pac, but you'd likely coordinate separate roofing contractors for structural work before their installation.
Both serve Contra Costa County, but Corda Solar is specifically Danville-based with focused local presence, while High Definition Solar operates from Concord and serves multiple Northern California counties including Santa Clara. For routine service calls, Corda's concentrated local focus may mean faster response times. For specialized issues or complex troubleshooting, High Definition Solar's broader operation may provide access to more technical resources across their larger service territory.
Corda Solar customers emphasize technical expertise for complicated installations and competitive pricing, suggesting strength in handling non-standard projects cost-effectively. High Definition Solar customers focus on professional sales process, right-sizing systems to actual usage, and long-term relationships, suggesting a more consultative approach with emphasis on ongoing service. Both receive positive feedback, but Corda appears positioned for complex technical projects while High Definition Solar emphasizes customer education and long-term partnerships.
Looking for the Best?
See our ranked list of top solar contractors in Contra Costa.
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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 10, 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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