Permit
Official authorization from local government (AHJ) to install a solar system. Typically requires construction, electrical, and sometimes structural drawings. Costs range from $0-$500+.
Why It Matters
Permit timelines are one of the biggest variables in solar installation speed. Some cities have online same-day permitting; others take 4-8 weeks.
Related Terms
AHJ (Authority Having Jurisdiction)
The local government entity (city, county, or township) responsible for permitting, inspecting, and approving solar installations and other electrical/building work.
Interconnection
The process of connecting your solar system to the utility grid, requiring utility approval and inspection.
NEC (National Electrical Code)
The U.S. standard for electrical installation safety (NFPA 70). Article 690 specifically covers solar PV systems, including wiring, grounding, labeling, and rapid shutdown requirements.