In the realm of solar energy, the design phase plays a pivotal role in determining the success of a project. Its here that careful planning, accurate calculations, and adherence to regulations are crucial. Two key aspects of this design process are Preliminary Solar Design and Permit Solar Design. While seemingly similar, these two stages serve distinct purposes and require different levels of detail.

Preliminary Solar Design: The Foundation
Preliminary solar design is the first and most foundational stage in any solar energy project. It provides an early evaluation of a site’s potential and helps outline the overall direction of the system. This stage includes:
- Site Analysis
Assessing critical site factors such as solar irradiance, shading, roof size, and orientation. - Preliminary System Sizing
Estimating system capacity based on the customer’s historical or projected energy consumption. - Feasibility Assessment
Evaluating both technical and financial viability for installing solar at the selected location. - Initial Cost Estimation
Providing a ballpark estimate of system cost, ROI, and payback period.
Permit Solar Design: The Blueprint for Execution
Permit solar design is a more detailed, code-compliant design package required for construction approval. It’s prepared after the preliminary phase and is submitted to authorities for permitting. This stage includes:
Permit Application Submission
Compiling and submitting all relevant documentation to AHJs (Authorities Having Jurisdiction) for project approval.
Detailed System Design
Full-scale plans showing solar panel placement, inverter location, conduit routing, and more.
Structural Analysis
Confirming that the roof or mounting structure can support the solar system and meets building code standards.
Electrical Calculations
Performing in-depth electrical load calculations to ensure system safety and compliance with NEC and local codes.
Conclusion
Both preliminary and permit solar designs are critical to the success of a solar installation. While the preliminary design acts as the strategic vision and feasibility check, the permit design ensures regulatory compliance and paves the way for safe, approved construction. Together, these stages streamline project timelines, reduce rework, and improve overall system performance.
Work With Ramsun Solar Design
Whether you’re a solar sales team needing quick layouts or an EPC firm preparing permit sets, Ramsun Solar Design is your trusted partner in solar project execution. We deliver accurate, code-compliant designs with a fast turnaround—empowering your business to scale with confidence and clarity.
E-mail: info@ramsunsolardesign.com
Website: www.ramsunsolardesign.com