PV plan sets outline the design and specifications of a solar energy system. They include detailed drawings, single-line diagrams, and technical information required for the solar permitting process. Solar plan sets must demonstrate code and zoning compliance and facilitate the approval of solar installations by local authorities having jurisdiction (AHJs).

The solar permitting process involves several steps to ensure that a PV system complies with local regulations and safety standards. The specific steps can vary by location but typically include: Permit application, including solar permit plans Permit review and approval by the AHJ Utility interconnection approval AHJ grants PV permit before the solar installation process Solar permit inspection from the local permitting office Obtaining final approval or permission to operate (PTO)

SolarAPP+ (Solar Automated Permit Processing Plus) is a tool developed by the National Renewable Energy Laboratory (NREL) and the U.S. Department of Energy (DOE) to streamline the solar permitting process. It contains an online platform and a set of standardized solar design specifications. If the solar system meets the requirements, applicants can receive instant approval, dramatically reducing the time it takes to obtain a solar permit approval. However, only certain AHJs are using SolarAPP+ at this time.

Typically, you need a solar engineering stamp for PV permits when the local building department or relevant AHJ requires a licensed professional engineer to review and approve the solar plan sets. This often depends on the size and complexity of the solar installation, and specific regulations and codes in your area. Professional engineer (PE) stamps for solar energy systems involve an electrical, civil, or structural engineer reviewing solar plan designs and providing their “seal of approval.” Check with your local permitting office to determine if solar engineering wet stamps are needed. The GreenLancer solar permit service includes solar engineering design services, including engineering stamps when needed.