Compare Local Pros
Diablo Solar Services vs Synergy 768
Contra Costa Solar Contractors Comparison · Updated March 2026
Diablo Solar Services brings 42 years of specialized solar experience versus Synergy 768's 12 years with broader electrical capabilities.
| Diablo Solar Services | Synergy 768 | |
|---|---|---|
| Rating | ★ 4.2 | ★ 4.3 |
| Years Licensed | 42 years | 12 years |
| License # | 454228 | 994847 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | Martinez, CA | Brentwood, CA |
| Website | diablosolar.com | synergy768.com |
Key Differences
What Customers Say
Diablo Solar Services
Customers emphasize Diablo's technical knowledge, thorough system inspections, and long-term relationships with clients served for 10-20 years, reflecting a service-focused approach that prioritizes repairs over replacements.
Synergy 768
Customers highlight Synergy 768's reliable project execution with on-schedule completions, budget adherence, and accessible owner involvement throughout installations of solar and EV infrastructure.
Key Takeaway: Diablo's feedback centers on diagnostic expertise and cost-saving repair recommendations, while Synergy 768's reviews focus on project management competence and integrated system installations, reflecting their different specializations.
Customer Reviews
Diablo Solar Services
Mike and his team are incredible, and I don't say that lightly. From my own personal experience working with both solar and pool service companies, Diablo Solar is an easy one for me to recommend. The...
Diablo saved me from another solar company that tried to pressure me into a more expensive program for repair of my solar panel. Diablo saved me thousands of dollars with expert advice and a staff tha...
Unlike many of their competitors, Diablo were willing to expand and existing solar system, and were able to maximally exploit existing equipment to cut the total cost. They did not try to oversell, co...
Synergy 768
Synergy 768 executed a very nice design for an expansion of our existing solar/battery system. Other companies had expressed doubt that the system could be expanded. After the plans were approved, the...
Ed Cotas and the Synergy 768 team performed professionally and punctually in installing the solar panel system at our home. They have been ready and available to answer any questions we have had. I w...
Synergy did a great job with a complicated ground mount solar system for me. They took care of everything including permits, PG&E, batteries and training !
Consider Diablo Solar Services if...
- ✓ Your solar system needs diagnosis or repair rather than replacement, where Diablo's 42 years of troubleshooting experience can identify cost-effective solutions
- ✓ You have a pool solar heating system, which represents a specialized area where Diablo maintains particular depth and long-term customer relationships
- ✓ You value a contractor who will prioritize repairs over pushing new equipment sales, based on consistent customer feedback about money-saving recommendations
- ✓ You're coordinating solar panel removal and reinstallation for a roof replacement, a service Diablo has refined through decades of experience
Consider Synergy 768 if...
- ✓ Your project combines solar installation with EV charging stations or significant electrical work, where Synergy 768's dual licensing provides integrated service
- ✓ You prioritize strong project management with predictable timelines and budgets, an area where customer feedback consistently highlights their performance
- ✓ Direct owner accessibility throughout your project matters to you, as Ed Cotas maintains high involvement in consultations and oversight
- ✓ You're installing a new system rather than servicing existing equipment, where Synergy 768's modern installation focus and permitting coordination shine
Questions to Ask Before Hiring
- → Ask Diablo Solar Services about their current scheduling availability during peak season, as some customers note challenges booking during busy periods
- → Ask Synergy 768 about their process for handling rebate paperwork and post-installation administrative tasks, where some customers experienced delays
- → For either contractor, request references from projects matching your specific needs: pool solar for Diablo or integrated solar-plus-EV installations for Synergy 768
- → Clarify warranty coverage and ongoing maintenance expectations, particularly important given Diablo's repair focus versus Synergy's new installation emphasis
The Bottom Line
Choose Diablo Solar Services if you need repair work, system diagnosis, pool solar expertise, or value a contractor who won't oversell replacements. Their 42 years of specialized experience provides depth that matters when problems arise or systems age. Choose Synergy 768 for new installations, especially projects combining solar with EV charging or electrical upgrades, where their integrated capabilities and strong project management deliver on-time, on-budget results. Both are properly licensed and insured. The decision comes down to project type: existing system servicing favors Diablo's veteran expertise, while new integrated installations favor Synergy's coordinated approach and owner accessibility.
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Frequently Asked Questions
For a simple new installation on an uncomplicated roof, the gap matters less. However, Diablo's experience becomes valuable if installers discover underlying issues like roof damage, complex electrical situations, or if you later need repairs. Synergy 768's 12 years still represents substantial experience for standard installations, with customer feedback showing reliable execution on new system projects.
Synergy 768 is the clearer choice for integrated projects. They handle both solar and EV charging under their electrical license, coordinate permitting for multiple systems simultaneously, and customers consistently report smooth execution of combined projects. Diablo specializes in solar systems specifically and doesn't emphasize EV infrastructure in their service offerings.
Diablo Solar Services has significantly deeper diagnostic experience with 42 years focused on troubleshooting both photovoltaic and pool solar systems. Customer feedback specifically highlights their repair-versus-replace guidance that has saved homeowners money. Synergy 768 focuses more heavily on new installations than servicing existing systems based on their project descriptions.
Diablo's customers emphasize technical expertise, thorough inspections, and long-term relationships spanning decades, reflecting their service-oriented approach. Synergy 768's feedback centers on project delivery metrics like schedule adherence, budget compliance, and permitting coordination, reflecting their strength in managing complete installations. Both patterns align with their respective specializations rather than indicating quality differences.
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 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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