Solar PV System Inspector Prep practice questions and answers 2026. Tap an option to test yourself — you'll see the correct answer and a plain-English explanation for every question. Free, no login.
Q1When reviewing a PV system permit package, which document is most essential for verifying electrical compliance?
✓ Correct answer: D. Single-line electrical diagram
The single-line electrical diagram is the most essential document for verifying electrical compliance as it shows the complete electrical path from the PV modules through inverters to the point of interconnection, including all overcurrent protection devices, disconnects, and grounding details.
Q2During inspection, you notice the installed microinverters differ from those specified in the approved plans. What should be documented first?
✓ Correct answer: C. The actual model and specifications of the installed microinverters
When a system component differs from approved plans, the inspector should first document the specific model and specifications of the installed equipment to determine if it complies with code requirements, even though it differs from the original documentation.
Q3What critical information must be included on a PV system site plan for proper documentation review?
✓ Correct answer: B. Array location and orientation on the structure
Array location and orientation are critical on a site plan as they determine compliance with setback requirements, fire access pathways, and impact system performance calculations that are necessary for code compliance verification.
Q4Which discrepancy between permit documents and the actual installation would most likely require immediate correction?
✓ Correct answer: A. Incorrect conductor sizing
Incorrect conductor sizing is the most serious discrepancy requiring immediate correction as undersized conductors can lead to overheating, fire hazards, and code violations that impact system safety.
Q5When reviewing structural documentation for a roof-mounted PV system, what information is most important to verify?
✓ Correct answer: D. Roof load calculations showing adequate capacity
Roof load calculations are most important in structural documentation as they demonstrate that the building can safely support the additional weight of the PV system, preventing structural failure.
Q6What should an inspector do when the as-built PV system includes additional modules not shown in the approved plans?
✓ Correct answer: C. Document the discrepancy and require revised electrical calculations
When additional modules are installed beyond what was approved, the inspector should document the discrepancy and require revised calculations to ensure the system remains code-compliant with the increased capacity.
Q7What is the primary purpose of verifying system labeling during a PV inspection?
✓ Correct answer: B. To ensure safety information is available to emergency responders and future maintenance personnel
Verifying system labeling ensures that emergency responders and maintenance personnel can quickly identify system components, hazards, and disconnect locations, which is critical for safety during emergencies.
Q8When reviewing electrical schematics for a PV system, which component must be clearly identified for code compliance?
✓ Correct answer: A. Point of interconnection with the utility grid
Point of interconnection must be clearly identified in electrical schematics as it shows where the PV system connects to the utility grid, which is critical for verifying proper integration and disconnection capabilities.
Q9What documentation is required to verify that rapid shutdown functionality meets NEC requirements?
✓ Correct answer: D. Manufacturer's installation instructions showing proper implementation
Manufacturer's installation instructions are required to verify rapid shutdown functionality as they contain specific guidance on proper installation and operation of these critical safety systems that must be followed for code compliance.
Q10When an inspection reveals that the installed inverter differs from the one in the plans but has the same electrical specifications, what should the inspector require?
✓ Correct answer: C. Updated as-built documentation reflecting the actual equipment installed
When an equivalent inverter is substituted, updated documentation is necessary to ensure that the as-built drawings accurately reflect the actual installation for future reference and maintenance.
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