Compare Local Pros
Diablo Solar Services vs Matrix HG
Contra Costa Electrical Contractors Comparison · Updated March 2026
You're comparing a specialized solar contractor with 42 years of experience to an HVAC company that doesn't appear to perform solar work.
| Diablo Solar Services | Matrix HG | |
|---|---|---|
| Rating | ★ 4.2 | ★ 3.7 |
| Years Licensed | 42 years | 23 years |
| License # | 454228 | 812232 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | Martinez, CA | Concord, CA |
| Website | diablosolar.com | www.matrixhginc.com |
Key Differences
What Customers Say
Diablo Solar Services
Customers consistently praise thorough technical knowledge, clear explanations, and long-term relationships with many reporting 10-20 years of service history.
Matrix HG
Customer experiences vary widely with positive mentions of professionalism offset by recurring concerns about pricing transparency and communication.
Key Takeaway: Diablo Solar's feedback reflects specialized expertise and relationship consistency, while Matrix HG's mixed reviews suggest variable service quality and unclear cost communication.
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...
Matrix HG
👌ðŸ¼
High level Company with prompt and accurate service Technicians.
Since Covid, our business opened 2 weeks and has been closed 7 months. We had no income coming in. But this company has worked with us. During this difficult time. Plus they did good work.
Consider Diablo Solar Services if...
- ✓ You need any solar-related service, from new photovoltaic installation to pool solar heating repair or seasonal maintenance
- ✓ You value specialized expertise, particularly important if your project involves roof coordination, system expansion, or diagnosing performance issues
- ✓ You want a contractor with consistent positive feedback about technical knowledge and customer relationships that span decades
- ✓ Your system requires troubleshooting or you want repair options explored before replacement recommendations
Consider Matrix HG if...
- ✓ You need HVAC maintenance, furnace installation, or heating and cooling system repairs
- ✓ Your project has nothing to do with solar energy systems
- ✓ You're willing to get detailed written estimates upfront and clarify all pricing before authorizing work, given feedback about transparency concerns
Questions to Ask Before Hiring
- → If Matrix HG quoted your solar project, ask specifically about their solar installation experience, certifications, and recent solar projects with verifiable references
- → Ask Diablo Solar Services about current scheduling availability, as customer feedback mentions busy season delays
- → Request detailed written estimates from either contractor that itemize all costs before any work begins
- → Ask about warranty coverage on both labor and equipment for your specific project type
The Bottom Line
If you need solar work of any kind, Diablo Solar Services is the clear choice with 42 years of specialized solar expertise and consistently positive feedback about technical knowledge and service quality. Matrix HG has no documented solar experience and specializes in HVAC systems. This shouldn't be a difficult decision unless you've been mis-matched during your search. For solar installation, repair, maintenance, or expansion, hire the contractor who has spent decades doing exactly that work. Schedule with Diablo and get detailed written estimates upfront. If you actually need HVAC work, Matrix HG may be suitable but address pricing transparency concerns before authorizing any work.
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Frequently Asked Questions
Contractor licenses in California sometimes cover multiple trade categories, or search algorithms may match based on location and general contractor status rather than specialization. Always verify that a contractor has actual project experience in your specific type of work, not just a license that technically permits it. Ask for recent solar project references if considering any contractor without clear solar expertise.
Yes, significantly. Solar technology has evolved considerably, but experience matters when diagnosing shading issues, coordinating with roof structure, understanding utility interconnection requirements, and troubleshooting system performance problems. Diablo's 42 years means they've installed systems under multiple building codes, worked with various equipment generations, and can identify issues that newer contractors might miss. This depth particularly matters for repairs, expansions, or complex installations.
The pricing transparency concerns mentioned by multiple customers warrant attention. If you do hire Matrix HG for HVAC services, insist on detailed written estimates before any work begins and clarify what scenarios would trigger additional charges. Ask how they handle unexpected issues discovered during service calls. Some mixed feedback is common for any contractor, but patterns around communication and pricing deserve upfront clarification.
Legally, yes, if their license classification covers solar work. Practically, this is unwise for homeowners. Solar installation involves specialized electrical work, understanding of inverter technology, battery systems, utility requirements, and solar-specific permitting. Hiring a contractor without demonstrated solar experience exposes you to improper installation, system underperformance, warranty issues, and potential safety hazards. Always verify actual solar project history, not just license eligibility.
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See our ranked list of top electrical 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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