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Aztec Solar vs Ilum Energy Solutions

Sacramento Solar Contractors Comparison · Updated March 2026

Quick Verdict

Aztec Solar brings 37 years of licensing versus Ilum Energy Solutions' 4 years, a meaningful difference in technical depth and problem-solving experience.

Aztec Solar: Aztec Solar is a veteran contractor with nearly four decades of experience handling diverse solar applications from pool heaters to complex photovoltaic systems.
Ilum Energy Solutions: Ilum Energy Solutions is a growing four-year contractor focused on residential photovoltaic installations with notably fast project completion timelines.
Aztec Solar Ilum Energy Solutions
Rating 4.2 4.6
Years Licensed 37 years 4 years
License # 550110 1092865
Workers' Comp ✓ Yes ✓ Yes
Bond Amount $25,000 $25,000
Location Rancho Cordova, CA Sacramento, CA
Website aztecsolar.com ilumsolar.com

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Key Differences

The most significant difference is experience depth. Aztec Solar's 37 years of continuous licensing means their teams have diagnosed and solved problems across thousands of installations, encountered rare roof conditions, managed complications with older electrical systems, and adapted to evolving technology from early solar thermal systems to modern battery-integrated photovoltaics. This institutional knowledge becomes valuable when projects encounter unexpected issues like hidden structural concerns or complex electrical upgrades. Ilum Energy Solutions, at 4 years, represents a capable but newer operation still building this problem-solving repository. Both companies share similar customer feedback themes around communication and professionalism, suggesting competent project management from both teams. Aztec Solar handles a broader range of solar applications including pool heating systems, while Ilum Energy Solutions focuses specifically on photovoltaic installations. Customers note Ilum's particularly fast installation timelines, which may appeal to homeowners prioritizing speed, while Aztec Solar's reviews emphasize educational sales processes and HOA coordination experience.

What Customers Say

Aztec Solar

Customers consistently mention educational sales approaches, professional installation crews, and strong HOA coordination, though some note inconsistent post-installation support responsiveness.

Ilum Energy Solutions

Customers emphasize remarkably fast installation timelines and thorough system explanations, with particular appreciation for completing projects significantly quicker than competing solar companies.

Key Takeaway: Ilum Energy Solutions receives specific recognition for installation speed while Aztec Solar's feedback centers on patient education and navigating regulatory requirements, suggesting different operational priorities.

Customer Reviews

Aztec Solar

Jan 2026

We purchased a home with an unheated in-ground pool in Grass Valley. Discouraged by the thought of the ridiculous cost of gas heating the water, we looked into solar options. We called Aztec Solar and...

Nov 2025

Aztec Solar came out and installed solar panels and a battery at our house. We were really happy with the whole process, they communicated well, did what they said they would and everything seems to b...

Oct 2025

Easy to work with and transparent about what a system can realistically output.

Ilum Energy Solutions

Apr 2025

I had solar installed at my home. So far it has been great, and service has been great. Thank you Broc!

Sep 2024

Knowledgeable, patient, professional, great team, fully understand Solar.

Apr 2024

Would have been a 5, but read on. Had ilum solar do a solar system on my roof and had no trouble initially, then had 1 issue with them regarding MPU (master panel upgrade). That issue resulted in th...

Consider Aztec Solar if...

  • Your project involves complexity beyond standard installations, such as older home electrical systems, structural concerns, or coordination with simultaneous roofing work where veteran diagnostic skills matter
  • You're considering pool solar heating or solar water heating applications alongside or instead of photovoltaic panels, as Aztec Solar maintains specific expertise in thermal solar systems
  • You have HOA requirements or permitting challenges where experience navigating regulatory processes and architectural review boards provides an advantage
  • You value a company's sustained market presence as an indicator of reliable warranty service availability years into the future
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Consider Ilum Energy Solutions if...

  • Installation speed is a priority and you have a straightforward residential photovoltaic project without unusual complications, where Ilum's noted fast timelines provide clear advantage
  • You're expanding an existing solar system or adding battery storage to a newer installation, which represents a significant portion of Ilum's documented project experience
  • You prefer working with a smaller, growing company where direct communication with decision-makers may be more accessible throughout the project
  • Your project is a standard residential photovoltaic installation on a newer home with uncomplicated electrical infrastructure where veteran-level troubleshooting experience is less critical
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Questions to Ask Before Hiring

  • Ask Ilum Energy Solutions for references from projects involving older homes or situations that required unexpected problem-solving beyond standard installations
  • Ask Aztec Solar about their current installation timelines and how their scheduling compares given customer feedback emphasizing Ilum's speed advantage
  • Ask both companies how long their current installation crews have worked together and what percentage of work is performed by employees versus subcontractors
  • Ask about their warranty service processes and how they handle repair calls for systems several years after installation, particularly given mixed feedback on Aztec's post-installation support

The Bottom Line

For most residential solar projects, Aztec Solar's 37 years of licensing provides meaningfully greater technical depth and problem-solving experience compared to Ilum Energy Solutions' 4 years. This advantage matters most if your home is older, your electrical system may need upgrades, you're considering multiple solar applications, or you value the institutional knowledge that comes from navigating thousands of installations across changing technologies and building codes. Choose Ilum Energy Solutions if you have a straightforward photovoltaic installation on a newer home and prioritize fast completion timelines, where their focused specialization and demonstrated speed provide clear value. For projects with any complexity or unknowns, Aztec Solar's veteran experience represents the safer choice this week.

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Frequently Asked Questions

For a straightforward installation on a newer home with clear roof access and modern electrical, the gap matters less. However, most residential solar projects encounter at least one complication: discovering an outdated service panel that needs upgrading, finding unexpected roof framing that requires creative mounting solutions, or coordinating utility interconnection issues. Veteran experience becomes valuable precisely when standard becomes non-standard, which happens more often than homeowners anticipate when planning solar projects.

Newer companies sometimes operate with more flexible scheduling and smaller project pipelines, allowing faster turnaround. Ilum's focus exclusively on photovoltaic installations rather than multiple solar application types may also streamline their processes. Fast completion is genuinely valuable, but verify that speed doesn't compromise thoroughness in areas like permit compliance, electrical inspection preparation, and system testing protocols that affect long-term performance.

If you're only installing photovoltaic panels, Ilum's focused specialization may be appropriate. However, Aztec Solar's breadth across solar thermal and photovoltaic applications indicates broader technical knowledge of solar energy systems generally. For homeowners considering future pool heating additions or solar water heating integration, working with a contractor experienced across multiple solar technologies provides planning advantages and potential bundling opportunities.

Yes, both companies meet the same legal protection requirements with $25,000 bonds and active workers compensation insurance, which protects you from liability if workers are injured on your property. The protection floor is equivalent. The experience difference doesn't change these legal safeguards, but it does affect the likelihood of encountering problems that would test those protections or require contractual dispute resolution in the first place.

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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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