Compare Local Pros
Solar Works vs Zero Energy Associates
Sonoma Electrical Contractors Comparison · Updated March 2026
Solar Works specializes exclusively in solar installations, while Zero Energy Associates offers both solar and comprehensive HVAC services for whole-home energy projects.
| Solar Works | Zero Energy Associates | |
|---|---|---|
| Rating | ★ 4.8 | ★ 5.0 |
| Years Licensed | 20 years | 23 years |
| License # | 878231 | 820063 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | Sebastopol, CA | Sebastopol, CA |
| Website | www.solarworksca.com | zeroea.com |
Key Differences
What Customers Say
Solar Works
Solar Works customers consistently emphasize detailed technical explanations, responsive communication, and long-term relationships with customers returning years later for system upgrades.
Zero Energy Associates
Zero Energy Associates customers highlight thorough consultations, high owner involvement, and the company's willingness to stand behind completed work across both solar and HVAC projects.
Key Takeaway: Solar Works feedback centers on solar-specific communication and education, while Zero Energy Associates reviews reflect satisfaction across a broader range of energy system projects with notable owner accessibility.
Customer Reviews
Solar Works
Time for an update. Solar Works just completed the 3rd large improvement to my Solar with Battery Backup system. John Matheny, Kyle, Emily, Vicki and Fernando work together constantly. The communica...
Great job! Good people. Solar works is a ‘B' corporation, in fact, the first B corporation in California! In addition, they had wonderful follow up service after completion, coming out to check on...
Solar Works' communication style was excellent. We were very pleased with how quickly Solar Works responded, met with us on site, answered all follow up questions, and informed us of all decisions. T...
Zero Energy Associates
Zero Energy was professional and did a great job installing my new heat pump heater. I strongly recommend them!
I've been using Zero Energy Associates for HVAC and solar on most of my construction projects for the last 7 years. Daniel Smith and his crew have always stood behind their work 100%. When asked, I al...
We had a wonderful experience with Zero Energy and based on this experience would choose to use them again There were a few glitches that were communicated clearly and then taken care of. The finished...
Consider Solar Works if...
- ✓ Your project is strictly solar panels or battery backup without HVAC component involvement
- ✓ You value working with California's first certified B Corporation for verified environmental and social standards
- ✓ You want a contractor whose entire two-decade focus has been solar technology and system design
- ✓ You prioritize detailed explanations specific to solar equipment selection and photovoltaic system performance
Consider Zero Energy Associates if...
- ✓ You're planning coordinated upgrades that combine solar with heat pump installation or gas-to-electric conversion
- ✓ You want one contractor to handle both your solar installation and HVAC system replacement or maintenance
- ✓ High owner involvement throughout your project is important to you
- ✓ You may need ongoing HVAC maintenance services after your solar installation is complete
Questions to Ask Before Hiring
- → If considering Zero Energy Associates for solar only, ask how project management differs between their solar-only jobs versus combined solar and HVAC installations
- → If considering Solar Works and you have aging HVAC equipment, ask for their recommended HVAC contractors to coordinate timing with your solar installation
- → Ask each company about their warranty service process and whether they handle repairs in-house or coordinate with equipment manufacturers
- → Request references from projects completed 5+ years ago to verify long-term system performance and ongoing support
The Bottom Line
Both contractors are veteran, fully credentialed companies with excellent qualifications. Choose Solar Works if your project is solar panels and battery backup without HVAC involvement—their 20 years of solar specialization and B Corporation certification reflect deep expertise in photovoltaic systems. Choose Zero Energy Associates if you're planning or considering coordinated energy upgrades that involve both solar and heating/cooling systems, or if you value having one contractor handle multiple systems with high owner involvement. For solar-only projects, either contractor has the experience and customer track record to deliver quality work. Make your decision based on project scope rather than searching for meaningful differences in their core qualifications.
Get Up to 3 Free Quotes
Compare prices from licensed, verified contractors
Frequently Asked Questions
Their broader service scope doesn't diminish their solar capability—they have 23 years of experience and positive solar project feedback. However, if you're certain you only need solar and have no interest in heat pump or HVAC services now or later, Solar Works' exclusive solar focus means every team member specializes in photovoltaic systems. The practical difference is minimal for a straightforward solar installation.
Both companies are in the veteran tier with over 20 years of licensed experience, so this three-year gap is not meaningful for decision-making. Both have demonstrated long-term business stability and accumulated extensive field experience. Focus instead on which service scope matches your project needs.
Solar Works specializes in solar and battery systems, not HVAC equipment. If you anticipate adding a heat pump within the next few years, Zero Energy Associates can design your solar system with future HVAC loads in mind and handle both installations. If heat pumps aren't in your plans, Solar Works' solar specialization is an advantage.
Both companies install battery storage systems and have customer feedback mentioning successful battery projects. Solar Works' exclusive solar focus means more concentrated experience with battery integration and solar-specific equipment selection. Zero Energy Associates can coordinate battery systems with whole-home electrical loads including HVAC equipment, which matters if you want your heat pump backed up during outages.
Looking for the Best?
See our ranked list of top electrical contractors in Sonoma.
Other Sonoma Electrical Contractors Comparisons
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.
Get in Touch
Have questions or feedback? We'd love to hear from you.