Compare Local Pros
Solar Technologies vs Eco Solar
Contra Costa Solar Contractors Comparison · Updated March 2026
This comparison requires you to first clarify whether you need solar panels for home electricity or solar heating for your pool—these companies serve completely different purposes.
| Solar Technologies | Eco Solar | |
|---|---|---|
| Rating | ★ 4.5 | ★ 4.5 |
| Years Licensed | 17 years | 19 years |
| License # | 932914 | 899476 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | San Ramon, CA | Concord, CA |
| Website | solartechnologies.com | ecosolarpools.com |
Key Differences
What Customers Say
Solar Technologies
Solar Technologies customers consistently praise their educational sales process and technical knowledge in photovoltaic systems, with strong feedback about professional installation crews and thorough permitting coordination, though some note communication could improve during project delays.
Eco Solar
Eco Solar customers highlight the owner's direct involvement in technical problem-solving for pool heating systems, with multiple reports of significant performance improvements after troubleshooting underperforming thermal installations.
Key Takeaway: Solar Technologies operates with a team-based structure across multiple project stages while Eco Solar features high owner involvement with direct customer interaction throughout pool heating projects, reflecting different business models suited to their respective solar specializations.
Customer Reviews
Solar Technologies
We're very happy with the personal attention we got from Liz at Solar Technologies. Every step of the way, from the original quote through the permitting and installation, went smoothly. Working with ...
One of the smoothest and stress free jobs I’ve ever experienced. Very knowledgeable and helpful technicians and customer service
Great company to work with. Sara was very helpful in scheduling and going over the work. Javier is an amazing guy - one man army - who can accomplish a lot of things including installation, checking, ...
Eco Solar
Doug was outstanding! He redid our solar that never worked well. Now it is warm and fully functional. He is smart and creative and really listens. I would recommend him without reservation. It is a...
Doug's materials, workmanship, value, attention to detail and communication has been exceptional! My system is awesome and heats my pool very quickly and reliably. If I could give him 10 stars I would...
Used Eco Solar recently to replace and upgrade pump and solar panels for pool heating. Works great (super warm water!). Doug was fantastic, patiently answered all my questions and had helpful recommen...
Consider Solar Technologies if...
- ✓ You're installing a photovoltaic solar system to generate electricity for your home and need a contractor experienced with residential power systems, utility interconnection, and California's evolving solar regulations
- ✓ Your project requires navigating complex permitting processes, HOA approvals, or municipal requirements where their 17 years of local experience provides value
- ✓ You want a team-based approach with dedicated project managers coordinating the work rather than owner-only availability
- ✓ You anticipate needing ongoing electrical system support like inverter replacements, system expansions, or troubleshooting for production issues
Consider Eco Solar if...
- ✓ You need solar pool heating installation or repair, not electricity-generating photovoltaic panels for your home
- ✓ Your existing pool solar system is underperforming and you want direct access to an experienced owner who can diagnose thermal circulation issues and controller problems
- ✓ You value high owner involvement throughout the project with Doug Rotermund directly handling system design and troubleshooting
- ✓ Your project involves upgrading or replacing components on an existing solar pool heating system, including panels, controllers, or pumps
Questions to Ask Before Hiring
- → Confirm explicitly which type of solar system you need: electricity generation for your home (photovoltaic) or pool heating (thermal collectors)
- → For Solar Technologies, ask about their current communication protocols during permitting delays and how they keep customers informed when timelines extend
- → For Eco Solar, ask about warranty coverage terms and the process for obtaining warranty service if equipment issues arise
- → Request references from projects matching your specific solar type and scope to verify the company's track record with similar installations
The Bottom Line
This comparison only makes sense once you've clarified your project type. If you're installing solar panels to generate electricity and reduce your utility bills, Solar Technologies is your match—they have 17 years handling residential photovoltaic systems with team-based project management and complete permitting expertise. If you need solar pool heating to warm your pool water without electric costs, Eco Solar is the specialist with 19 years focused exclusively on thermal pool systems and high owner involvement. These companies don't compete for the same work. Identify whether you need electricity generation or pool heating, then contact the appropriate specialist.
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Frequently Asked Questions
No, these companies specialize in entirely different solar technologies. Solar Technologies installs photovoltaic systems that generate electricity for home use, while Eco Solar exclusively handles solar thermal systems for pool heating. If you need both, you would hire them for separate projects or find a different contractor offering both services.
The 19 versus 17 years is minimal compared to the fundamental difference in what they build. Both qualify as veteran contractors with sufficient experience to handle complex projects in their respective specializations. Focus on which type of solar system you actually need rather than the small experience gap.
For photovoltaic home systems, Solar Technologies receives consistent feedback about their educational sales approach and detailed system explanations. For pool heating systems, Eco Solar customers highlight the owner's technical knowledge and willingness to answer questions. Both demonstrate patient communication, but you must first determine which solar technology matches your actual project need.
Cost comparison isn't meaningful here because they install completely different systems with different price ranges. Residential photovoltaic installations typically cost $15,000-$40,000+ depending on system size, while solar pool heating systems generally range $3,000-$8,000. Get quotes based on the specific solar technology your project requires.
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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