Commercial Solar System Design and Engineering – San Diego County

Your Property, Our Promise

Inspections Within 24-48 Hours

Manufacture Material Warranties

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Hours:

Solar panels

Roof-Mounted & Ground-Mounted Solar

Battery

Battery Backup & Storage Systems

Solar + Roofing Combo Packages

Time to Install

4–12 weeks (based on system size and permitting) Cost Range: $50,000–$1M+ (varies by kW, roof type, and site conditions)


Pricing Disclaimer: Cost ranges are estimates only. Final pricing will vary based on your specific project size, roofing materials, and site conditions. A written proposal will be provided after inspection.


Financing Options: Commercial Loans, Tax Incentives (ITC, MACRS)


All financing options are subject to credit approval and may vary based on program eligibility. We'll help you find a solution that works for your timeline and budget—no pressure, no surprises.


If your business, school, or facility is considering solar, TAG Roofing & Solar offers turnkey commercial solar design and engineering services. We analyze your usage, site characteristics, and ROI to create custom solar energy systems that reduce operating costs, improve ESG metrics, and future-proof your energy spend. From flat roofs to carports and ground mounts, our team manages each project with precision and professionalism.


Most commercial solar projects—from design through installation—take 6 to 12 weeks depending on size and utility coordination.


Why Choose TAG for Commercial Solar Design?

  • NABCEP-certified commercial solar designers
  • Structural analysis and electrical engineering in-house
  • Deep knowledge of SDG&E interconnection and NEM 3.0
  • Experience across industrial, nonprofit, education, and retail
  • Long-term service plans, monitoring, and performance warranties


What to Expect When Hiring TAG for Commercial Solar Design

  1. Feasibility Study & Load Analysis – We gather utility data, site photos, and load profiles to model solar potential, offset %, and ROI.
  2. On-Site Survey & Engineering – Our team performs a full structural, shading, and electrical inspection. We verify rafter size, main panel capacity, and solar access.
  3. System Design & Drafting – Your project receives a full CAD design with module layout, conduit paths, inverter specs, and attachment plan. Stamped engineering included.
  4. Permit & Utility Submission – We prepare and submit applications for city permit and utility interconnection (including SDG&E or relevant provider).
  5. Value Engineering Options – For large portfolios, we offer multiple panel/inverter configurations to meet budget, efficiency, and aesthetics.
  6. Financing Support – TAG connects clients with vetted lenders—plus support for ITC, MACRS, and state/local grants.

Reviews

Get the Solar Power Advantage Today

Contact us today for more information.

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Commercial Solar FAQs

  • What incentives are available for commercial solar in California?

    Technically, yes—but it often results in extra costs. It's more efficient to replace your roof first or bundle both services together.

  • Can my roof support solar panels?

    Yes. The portion of the roofing that supports solar panels may qualify for the 30% federal tax credit.

  • Is there a way to offset installation cost without upfront cash?

    Yes. Commercial solar loans may offer zero-down or low-interest terms.

  • Can I install EV charging alongside solar?

    Absolutely. We design systems to include EV charging stations, battery storage, and load-balancing as needed.

TAG Roofing & Solar brings deep commercial expertise to your project—ensuring your solar investment is designed right, permitted fast, and built to scale.

Our home is 32 years old and needed a new roof. Karl was great and easy to work with through the estimation/quote process. The office was easy to work with for payments and scheduling. Anthony and his team were fun to work with while delivering on everything they said they'd do. Anthony kept the project running on schedule, worked around rainy days, and was a great resource for us to ensure our home was safe. The new roof looks excellent, new wood work around the roof turned out great, overall very happy.

Matthew K.