Compare Local Pros
Greiner Heating Air And Electric vs Robert's Solar
Solano Solar Contractors Comparison · Updated March 2026
Greiner brings veteran HVAC expertise with full insurance coverage, while Robert's Solar lacks workers comp and has no verifiable customer feedback.
| Greiner Heating Air And Electric | Robert's Solar | |
|---|---|---|
| Rating | ★ 5.0 | ★ 3.0 |
| Years Licensed | 47 years | 32 years |
| License # | 365955 | 690958 |
| Workers' Comp | ✓ Yes | — |
| Bond Amount | $25,000 | $25,000 |
| Location | Dixon, CA | Dixon, CA |
| Website | www.ghac.com | robertssolar.com |
Key Differences
What Customers Say
Greiner Heating Air And Electric
Customers consistently praise Greiner for thorough inspections, detailed explanations with photographic documentation, same-day service response, and respectful property treatment across decades of repeat business.
Key Takeaway: Greiner provides extensive verifiable customer feedback documenting service quality and reliability, while Robert's Solar has no available review history to confirm project outcomes or customer experience.
Customer Reviews
Greiner Heating Air And Electric
Very professional and kind techs...big reason I stay with the monthly subscription are techs like Jose who are super professional and explain everything thoroughly without pressuring.
This is the best experience I've ever had with a tradesmen coming to do Home repairs. The technician Jason did a thorough inspection. He took the time to explain to me what he did and what might be ne...
I recommend using Greiner. They have given me wonderful service over the years. From the friendly receptionist who has a very kind demeanor every time I've called. And the technicians provided me wi...
Robert's Solar
Thorough, conscientious, timely. Will definitely use again
Consider Greiner Heating Air And Electric if...
- ✓ You need HVAC installation, repair, or maintenance services and want a contractor with documented customer satisfaction across decades of service
- ✓ You value same-day emergency response capability, which Greiner's review history consistently confirms for heating and cooling failures
- ✓ You want full insurance protection including workers comp, eliminating your liability exposure during service work
- ✓ You appreciate detailed explanations and photographic documentation of work performed, which customers specifically highlight in Greiner's feedback patterns
Consider Robert's Solar if...
- ✓ You specifically need solar panel installation and Robert's Solar is the only solar-licensed contractor you're considering in your immediate area
- ✓ You're willing to verify workers comp coverage directly and confirm your homeowner's policy adequately covers contractor injuries during rooftop work
- ✓ You can obtain and verify multiple references from recent solar installations, compensating for the absence of public review history
- ✓ You understand the liability risks and have confirmed alternative insurance protections before proceeding
Questions to Ask Before Hiring
- → For Robert's Solar: Ask directly about current workers compensation coverage status and request certificate of insurance. If still unavailable, consult your homeowner's insurance agent about your liability exposure for contractor injuries.
- → For Robert's Solar: Request contact information for at least three recent solar installations completed in the past 12 months, and verify installation quality and communication directly with those homeowners.
- → For Robert's Solar: Ask how long their current installation crew has worked together and what safety protocols they follow for rooftop work.
- → For both: Request detailed written estimates specifying all work to be performed, equipment specifications, project timeline, and warranty coverage.
The Bottom Line
If you need HVAC or electrical services, Greiner is the clear choice with 47 years of experience, full insurance coverage including workers comp, and extensive customer feedback confirming reliable service delivery. If you specifically need solar installation, Robert's Solar's missing workers comp and absent review history create significant risk factors you must address. Before hiring Robert's Solar, obtain proof of current workers comp coverage or consult your insurance agent about liability protection, and verify recent project quality through direct customer references. Do not proceed with rooftop solar work from any contractor without confirming adequate injury liability coverage.
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Frequently Asked Questions
Both involve injury risk, but solar installation requires extended rooftop work at significant heights, increasing fall hazards substantially. Without workers comp, any installer injury on your roof could result in claims against your homeowner's insurance, potentially affecting your rates or coverage. HVAC work involves risk too, but Greiner carries the proper coverage regardless.
Licensing longevity confirms Robert's Solar has maintained state requirements for three decades, which is meaningful. However, absent customer feedback means you cannot verify how they communicate, handle complications, or complete projects. You'll need to do additional due diligence through direct references and documentation that Greiner's customers have already provided publicly.
Greiner specializes in HVAC and electrical work, not solar installation, which requires different licensing, expertise, and equipment knowledge. If you need solar panels, you need a solar contractor. If you need heating, cooling, or electrical services, Greiner's documented track record makes them a strong choice.
Without workers comp coverage, the injured worker could file a claim against your homeowner's insurance, potentially leading to increased premiums or coverage complications. Before hiring any contractor without workers comp, contact your insurance agent to understand your specific exposure and whether additional coverage is advisable.
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See our ranked list of top solar contractors in Solano.
Other Solano Solar Contractors Comparisons
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Right Now Air And Solar
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Element Electric
★ 5.0
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Gomaxxx Inc
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Greiner Heating Air And Electric
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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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