Compare Local Pros
Core Energy vs Dollens Electric
Santa Clara Solar Contractors Comparison · Updated March 2026
Dollens Electric brings nearly three times the experience and proven customer satisfaction track record, while Core Energy specializes specifically in solar.
| Core Energy | Dollens Electric | |
|---|---|---|
| Rating | ★ 1.0 | ★ 4.9 |
| Years Licensed | 7 years | 20 years |
| License # | 1042269 | 867376 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | San Jose, CA | San Jose, CA |
| Website | coreenergy.io | dollenselectric.com |
Key Differences
What Customers Say
Dollens Electric
Customers consistently praise Dollens Electric for rapid response times, knowledgeable technicians who explain work thoroughly, and professional service that generates repeat business.
Key Takeaway: Dollens Electric has established customer feedback confirming service quality and communication practices, while Core Energy lacks this verification of their customer experience.
Customer Reviews
Core Energy
No reviews available
Dollens Electric
Great Company, very happy every time they do work for us.
I needed to upgrade my electrical panel. Dollens Electric did a load calculation and recommended a new panel that would accommodate the electrification of my furnace and water heater down the road. Th...
Fixed my problem and replaced my electronic door lock promptly.
Consider Core Energy if...
- ✓ You specifically want a contractor focused exclusively on solar installations and believe specialization outweighs broader electrical experience
- ✓ You've obtained strong references directly from Core Energy that verify their work quality and customer service
- ✓ Your project is straightforward solar installation on a newer home with simple electrical configuration
Consider Dollens Electric if...
- ✓ Your home may need panel upgrades or electrical work beyond just solar installation, which Dollens can handle comprehensively in one project
- ✓ You value proven customer satisfaction patterns, particularly responsiveness and detailed technical communication during the project
- ✓ You're planning future electrical projects like EV charger installation and want to establish a relationship with a contractor who can handle multiple needs
- ✓ You prioritize the problem-solving capability that comes with 20 years of field experience across diverse electrical situations
Questions to Ask Before Hiring
- → Ask Core Energy for at least three recent solar installation references you can contact, and specifically inquire about project timeline accuracy and communication during the work
- → Ask both contractors how they handle roof penetrations and waterproofing, and what warranty they provide on installation workmanship separate from equipment warranties
- → Ask Dollens what percentage of their current business is solar installation and how many solar projects they complete annually
- → Confirm with both contractors exactly what electrical work is included in their solar quote, particularly regarding panel upgrades or service modifications if needed
The Bottom Line
Dollens Electric is the more defensible choice for most homeowners, bringing 20 years of electrical expertise, proven customer satisfaction with solar and related electrical projects, and demonstrated responsiveness that matters when you need questions answered during installation. Their veteran experience means better odds of anticipating and solving complications, and their broad electrical capabilities provide value if your solar project requires panel upgrades or you're planning future electrical additions. Consider Core Energy only if you obtain strong, verifiable references that demonstrate service quality comparable to Dollens' documented track record, or if their quote is significantly lower and you're comfortable with the higher uncertainty about the customer experience.
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Frequently Asked Questions
Specialization can mean focused expertise, but solar installation fundamentally requires strong electrical knowledge, which Dollens has demonstrated over 20 years. Dollens also handles solar projects and can address the broader electrical implications like panel capacity, circuit additions, or future EV charging that often accompany solar decisions. Without customer reviews for Core Energy, it's difficult to verify whether their specialization translates to superior installation quality or service.
Seven years is sufficient time to develop technical competency in solar installation. However, solar projects often reveal unexpected issues like outdated wiring, insufficient panel capacity, or structural concerns that benefit from broader experience. The concern with Core Energy is less about minimum competency and more about the lack of customer feedback to verify how they handle complications, timelines, and communication throughout the project.
This is a legitimate question to ask Dollens directly, including how many solar installations they complete annually and what their current project timeline looks like. Their customer reviews emphasize quick response times and follow-through on commitments, suggesting they manage their workload effectively, but you should confirm their availability and dedicated timeline for your specific project.
The main risk is uncertainty about their customer service, communication practices, timeline reliability, and how they handle problems during installation. Both companies have proper licensing and bonding, so you have legal recourse if work isn't completed. However, reviews help predict the day-to-day experience of working with a contractor, which you'll need to assess through direct references and your initial interactions with Core Energy.
Looking for the Best?
See our ranked list of top solar contractors in Santa Clara.
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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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