Commercial Solar System Design and Engineering – San Diego County

Commercial Solar Design & Engineering

Future-proof your business energy. TAG Roofing & Solar provides turnkey commercial solar design and engineering services for businesses, schools, and facilities across San Diego County. Our NABCEP-certified team delivers systems that lower operating costs, improve ESG metrics, and give you predictable long-term energy savings.

From flat roof arrays to carports and ground-mounted systems, we manage your project from feasibility study to final inspection — with precision, professionalism, and local expertise in SDG&E interconnection.

TAG Roofing & Solar brings deep commercial expertise to your project — ensuring your solar investment is designed right, permitted fast, and built to scale. From flat roofs to carports and ground-mounted systems, our NABCEP-certified team manages your project from feasibility study to final inspection with precision and professionalism.

Time to Install & Cost Range

Time to Complete: 6–12 weeks (design through installation; varies by system size, permitting, and utility coordination)
Cost Range: $50,000–$1M+ (based on kW size, 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 & Incentives

We connect clients with vetted lenders and help maximize available benefits:

• Commercial Loans
• ITC (Investment Tax Credit)
• MACRS (Modified Accelerated Cost Recovery System)
• State and Local Grants

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.

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 requirements
• 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

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