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Occidental Power vs Trulysun Energy

San Francisco Solar Contractors Comparison · Updated March 2026

Quick Verdict

Occidental Power brings 36 years of veteran experience but lacks reviews, while Trulysun Energy offers 4 years of solar-specific expertise with documented customer feedback.

Occidental Power: A veteran contractor with over three decades of licensing history but limited online review presence and no clear specialization focus.
Trulysun Energy: A growing solar specialist with high owner involvement and documented project experience, though still building its track record at 4 years licensed.
Note: Occidental Power's limited review history makes it difficult to assess recent project performance despite decades of licensing.
Occidental Power Trulysun Energy
Rating 5.0 4.4
Years Licensed 36 years 4 years
License # 591549 1078990
Workers' Comp ✓ Yes ✓ Yes
Bond Amount $25,000 $25,000
Location San Francisco, CA San Francisco, CA
Website www.oxypower.com trulysun.com

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Key Differences

The most significant difference is specialization versus longevity. Trulysun Energy focuses exclusively on solar panel installations, removals, EV charger setups, and photovoltaic troubleshooting, with documented customer experiences to verify this work. The company frequently operates as a subcontractor for solar equipment providers, handling technical installation and permitting. Occidental Power's 36-year licensing history suggests deep familiarity with San Francisco building codes and contracting operations, but without review data or stated specialization, it's unclear whether they perform solar work regularly or what their recent project performance looks like. Trulysun's owner provides high engagement throughout projects, personally handling estimates and management. However, customer feedback mentions permitting inspection challenges and timeline variability. At 4 years licensed, Trulysun is still establishing its operational procedures, while Occidental's three decades suggest institutional stability but raise questions about why no review presence exists for such a long-standing contractor.

What Customers Say

Trulysun Energy

Customers consistently note the owner's direct involvement in projects and responsive communication, with praise for installation timeliness but mixed experiences regarding permitting and inspection coordination.

Key Takeaway: Trulysun Energy has documented customer feedback verifying solar project completion and owner engagement, while Occidental Power's 36-year history lacks online review presence to assess recent performance quality.

Customer Reviews

Occidental Power

No reviews available

Trulysun Energy

Jan 2026

Trulysun installed solar at my home. They worked through supplier challenges, city permitting and with PGE. Couldn’t be happier with their professionalism and diligence!

Mar 2025

Super impressed with David Rubio from Trulysun Energy and would highly recommend. For the last 3 years my solar system has been great, but intermittently shutting down during the rain. The first four...

Dec 2024

Great company to work with! David and his team did a fantastic with our solar panels installation! I would recommend them to anyone who is looking to install solar!

Consider Occidental Power if...

  • You're comfortable verifying recent project quality directly through references since online reviews are unavailable, and you value the potential for institutional knowledge from 36 years of operations.
  • Your project might extend beyond solar work and you want a contractor who may handle general contracting needs, though you'll need to confirm Occidental's actual service scope.
  • You prioritize maximum licensing tenure and want the stability that comes with a contractor who has maintained operations through multiple economic cycles in San Francisco.
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Consider Trulysun Energy if...

  • Your project involves solar panel installation, removal and reinstallation for roofing work, EV charger setup, or photovoltaic system troubleshooting where specialized solar expertise matters most.
  • You value high owner involvement and want direct communication with the person managing your project from estimate through completion.
  • You're willing to accept some permitting timeline variability in exchange for documented customer feedback showing actual solar project completion and a contractor who specializes in exactly what you need.
  • You want verification through recent customer experiences that the contractor actively performs the work you're hiring them for.
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Questions to Ask Before Hiring

  • Ask Occidental Power for at least three recent references from solar projects completed in the past 12 months and why they have limited online review presence despite 36 years in business.
  • Ask Trulysun Energy specifically about their process for handling San Francisco permitting inspections and what contingency timeline they build in for inspection-related delays.
  • Confirm with both contractors whether they perform solar installations as a primary service line or occasional work, and ask how many solar projects they've completed in the past year.

The Bottom Line

For solar-specific projects, Trulysun Energy is the clearer choice despite being newer. Their 4 years of documented solar installation experience, high owner involvement, and customer feedback showing actual project completion outweigh Occidental Power's licensing longevity when you can't verify what services Occidental currently provides or how well they perform them. If you're considering Occidental, invest significant time verifying their solar expertise and recent project quality through direct references. Trulysun's permitting challenges are manageable with clear timeline expectations upfront, and their specialization means you're hiring a contractor who does solar work daily, not occasionally. Check Trulysun's references about permitting communication, but their proven solar focus makes them the safer bet for photovoltaic projects.

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Frequently Asked Questions

Not necessarily. Licensing tenure shows business longevity but doesn't confirm solar specialization. Trulysun Energy's documented solar-specific project history and subcontracting relationships with equipment providers demonstrate active solar expertise, while Occidental Power's service focus remains unclear from available data. For solar work, recent specialized experience often matters more than general contracting longevity.

Permitting delays are common in San Francisco solar installations due to city inspection requirements and utility coordination. The key is whether the contractor communicates proactively about these timelines. Ask Trulysun directly how they handle inspection scheduling, what their average timeline includes for permitting steps, and how they keep customers informed when delays occur.

For specialized solar work, you're choosing proven recent solar expertise with documented customer outcomes over unverified general longevity. Trulysun's high owner involvement, specific solar focus, and equipment provider relationships may deliver better results for solar projects than a veteran contractor whose recent solar experience is unknown. The 4-year tenure does mean less operational track record, so reference checks become especially important.

It's a yellow flag requiring investigation. Some established contractors simply don't prioritize online presence, while others may have limited recent activity or customer satisfaction issues. Ask Occidental directly for recent customer references you can contact, and verify they're actively performing the type of work you need. Their 36-year licensing suggests they haven't had serious license issues, but you need to verify current operational quality yourself.

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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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