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Question 1

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During an electrical inspection of a PV system, you observe that the AC interconnection point label is missing. According to NEC 690.54, what information must this label include?

The nameplate data of the PV modules only

The operating AC voltage, rated AC output current, maximum AC output current, and nominal operating frequency

The utility company name and account number

Only the rated AC output current of the inverter

to track

2026 Statistics

Key Facts: NABCEP PVSI Exam

Exam Questions

NABCEP

Passing Score (0-99)

NABCEP

2 hrs

Exam Duration

NABCEP

$150

Exam Fee

NABCEP

~70-80%

First-Time Pass Rate

Industry estimate

3 years

Certification Validity

NABCEP

The NABCEP PVSI exam has 45 multiple-choice questions (40 scored + 5 pilot) in 2 hours with a 65 scaled passing score. Four domains: Electrical Inspection (44%), Energy Storage Inspection (21%), Mechanical/Structural Inspection (21%), Documentation (14%). No prerequisites required. Exam fee is $150 with no application fee. Must take within 6 months of approval.

Sample NABCEP PVSI Practice Questions

Try these sample questions to test your NABCEP PVSI exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1During an electrical inspection of a PV system, you observe that the AC interconnection point label is missing. According to NEC 690.54, what information must this label include?

A.The nameplate data of the PV modules only

B.The operating AC voltage, rated AC output current, maximum AC output current, and nominal operating frequency

C.The utility company name and account number

D.Only the rated AC output current of the inverter

Explanation: NEC 690.54 requires the AC interconnection point to be marked with the operating AC voltage, rated AC output current, maximum AC output current, and nominal operating frequency. This information ensures that anyone working on the electrical panel understands the characteristics of the PV power source. Exam tip: Labeling violations are among the most common inspection failures -- know all required label locations and content.

2What is the PRIMARY purpose of verifying that labels on a PV system are of sufficient durability for the environment involved?

A.To confirm the labels were manufactured by a listed company

B.To meet the aesthetic requirements of the building owner

C.To ensure the labels match the contractor's branding requirements

D.To ensure safety information remains legible throughout the life of the system despite weather exposure

Explanation: Labels must remain legible for the life of the PV system to ensure that safety information is always available to first responders, maintenance personnel, and future inspectors. Labels exposed to UV, moisture, and temperature extremes must be rated for outdoor use. Exam tip: NEC 690.31(G) and local AHJ requirements often specify that labels must be suitable for the environment -- check for UV-resistant, weatherproof labels on exterior equipment.

3An inspector finds that DC raceway labels are not present on a residential PV installation. According to NEC 690.31(G), how must DC PV conduits be identified?

A.With labels marked 'PHOTOVOLTAIC POWER SOURCE' at every accessible point and at intervals not exceeding 10 feet

B.DC raceways do not require labeling if the conductors inside are properly colored

C.With a single label at the inverter only

D.With yellow paint every 20 feet

Explanation: NEC 690.31(G) requires that raceways, cable trays, and other wiring methods for PV source and output circuits be marked with the label 'PHOTOVOLTAIC POWER SOURCE' at every accessible point and at intervals not exceeding 10 feet. This alerts electricians and first responders to the presence of energized DC conductors. Exam tip: Even when a PV system is shut down, DC conductors from the array remain energized whenever sunlight is present.

4When inspecting a PV system, you notice the rapid shutdown system label is missing from the service entrance. What does NEC 690.12 require for rapid shutdown labeling?

A.A reflective label at the service entrance indicating the type of rapid shutdown system and instructions for initiating it

B.Only a label on the inverter is required

C.A label indicating the system does not have rapid shutdown capability

D.No label is required if the system is less than 5 kW

Explanation: NEC 690.12 requires a plaque or directory at the service entrance providing basic information about the rapid shutdown system, including the type and location of the initiation device. This information is critical for first responders who need to de-energize conductors quickly in an emergency. Exam tip: Rapid shutdown requirements have become progressively stricter with each NEC cycle -- the 2017 and 2020 NEC expanded the scope significantly.

5What is the proper label color combination for a PV system danger/warning sign per ANSI Z535 standards?

A.White text on red background for DANGER or black text on orange background for WARNING

B.Green text on yellow background

C.Any color combination chosen by the installer

D.Blue text on white background

Explanation: ANSI Z535 safety sign standards specify that DANGER signs use white text on a red background, while WARNING signs use black text on an orange background. PV system labels must conform to these standards to ensure immediate recognition by emergency personnel and maintenance workers. Exam tip: Confirm labels are the proper color, in legible print (not handwritten), and appropriate for the hazard level indicated.

6During inspection, the main service panel label for the PV system is handwritten on a piece of tape. What is the correct inspector response?

A.Require that labels be the proper color and in legible print, not handwritten, per NEC requirements

B.Require the installer to laminate the handwritten label

C.Accept it only if the handwriting is clearly legible

D.Accept it as long as the information is accurate

Explanation: NEC requires that PV system labels be of proper color, legible print, and not handwritten. Handwritten labels can become illegible over time and do not meet the durability and standardization requirements for safety signage. The inspector should flag this as a code violation requiring correction. Exam tip: The NABCEP PVSI JTA lists confirming labels are proper color and legible print (not handwritten) as a useful inspection task.

7When verifying that installed PV components match the approved plans, what is a CRITICAL first step for the inspector?

A.Checking the color of the modules against the plan rendering

B.Verifying working clearances on all components and ensuring all components are listed, labeled, and identified for use

C.Counting the number of PV modules to verify it matches the plan count

D.Measuring the tilt angle of each module

Explanation: The two most critical tasks when verifying installed components are confirming adequate working clearances per NEC 110.26 and ensuring all components are listed, labeled, and identified for use per NEC 110.2. Working clearance violations create safety hazards for maintenance and emergency access. Exam tip: NEC 110.26 requires a minimum of 36 inches of working clearance in front of electrical equipment for systems up to 600V.

8An inspector discovers that an inverter installed outdoors is rated NEMA 1. What action should the inspector take?

A.Flag the installation as non-compliant because NEMA 1 enclosures are rated for indoor use only and are not suitable for outdoor environments

B.Request documentation that the manufacturer approved the outdoor installation

C.Approve the installation since NEMA 1 is suitable for all locations

D.Approve it if the inverter is under a roof overhang

Explanation: NEMA 1 enclosures are designed for indoor use only, providing protection against contact with enclosed equipment but not against environmental conditions. Outdoor installations typically require NEMA 3R or higher rated enclosures to protect against rain, sleet, and ice. The inspector must verify the NEMA rating matches the installation environment. Exam tip: NEMA 3R is the minimum for outdoor wet locations; NEMA 4X for corrosive or washdown environments.

9What does it mean for a PV component to be 'listed' in the context of NEC requirements?

A.The component appears on the installer's bill of materials

B.The component is included in the manufacturer's product catalog

C.The equipment has been evaluated by a Nationally Recognized Testing Laboratory (NRTL) and found to meet applicable safety standards

D.The component has been approved by the local utility company

Explanation: Per NEC Article 100, 'listed' means equipment that has been evaluated by a Nationally Recognized Testing Laboratory (NRTL) such as UL, ETL, or CSA and found to meet applicable safety standards. Listed equipment bears the testing laboratory's mark. Inspectors must verify that all electrical components bear a listing mark from an NRTL. Exam tip: NEC 110.2 requires that equipment be approved, and NEC 110.3(B) requires installation per the listing and manufacturer's instructions.

10During inspection, you find that the number of PV modules installed differs from the approved plan by two additional modules. What is the appropriate response?

A.Approve it if the additional modules are the same manufacturer

B.Approve it as long as the string voltage does not exceed the inverter maximum

C.Approve the installation since more modules means more power

D.Fail the inspection and require a revised permit application reflecting the actual installation before re-inspection

Explanation: Any deviation from the approved plans, including additional modules, requires a revised permit application and plan review. Additional modules affect string voltage calculations, structural loading, conductor sizing, and overcurrent protection requirements. The inspector must document the deviation and require corrective action. Exam tip: Always compare the as-built installation to the approved plans -- even seemingly minor changes can have code implications.

About the NABCEP PVSI Exam

The NABCEP PV System Inspector certification validates competency in inspecting photovoltaic systems on buildings. The exam covers electrical component inspection, energy storage system inspection, mechanical and structural component inspection, and inspection documentation. This is the most accessible NABCEP certification with no prerequisites — no OSHA training, education, or experience requirements. Certification demonstrates ability to evaluate PV system safety and code compliance.

Questions

45 scored questions

Time Limit

2 hours

Passing Score

65 (scaled 0-99)

Exam Fee

$150 (exam only, no application fee) (NABCEP / Meazure Learning)

NABCEP PVSI Exam Content Outline

44%

Inspecting Electrical Components and Systems

NEC compliance, conductor sizing, overcurrent protection, grounding, rapid shutdown, labeling

21%

Inspecting Energy Storage Components and Systems

Battery systems, NEC Article 706, charge controllers, energy storage safety, ventilation

21%

Inspecting Mechanical/Structural Components and Systems

Mounting systems, structural attachments, weatherproofing, module installation integrity

14%

Documentation for the System Inspection

Inspection reports, code references, deficiency documentation, approval/rejection criteria

How to Pass the NABCEP PVSI Exam

What You Need to Know

Passing score: 65 (scaled 0-99)
Exam length: 45 questions
Time limit: 2 hours
Exam fee: $150 (exam only, no application fee)

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

NABCEP PVSI Study Tips from Top Performers

1Electrical inspection is 44% of the exam — master NEC 690 requirements for conductors, overcurrent protection, grounding, rapid shutdown, and labeling

2Energy storage inspection (21%) is heavily weighted — study NEC Article 706, battery room ventilation, disconnects, and safety requirements

3Know the difference between code violations that require correction vs. items that are recommendations

4Study proper inspection documentation: what to include in reports, how to reference specific NEC articles, and deficiency categorization

5Review mechanical/structural inspection criteria: attachment methods, waterproofing, load paths, and module mounting integrity

Frequently Asked Questions

What is the NABCEP PV System Inspector exam?

The NABCEP PVSI is a certification for professionals who inspect photovoltaic systems. It has 45 multiple-choice questions (40 scored + 5 pilot) in 2 hours covering electrical inspection, energy storage, mechanical/structural inspection, and documentation. A scaled score of 65 is required to pass.

Does the NABCEP PVSI have any prerequisites?

No. The PVSI is the most accessible NABCEP certification — there are no OSHA training, education, or work experience requirements. Anyone can apply and take the exam, though preparation courses are recommended.

How hard is the NABCEP PVSI exam?

The exam is moderate in difficulty with an estimated 70-80% first-time pass rate. It has fewer questions (45 vs 70), a lower passing score (65 vs 70), and shorter duration (2 hours vs 4 hours) compared to other NABCEP specialist exams. Most candidates study 40-60 hours over 4-6 weeks.

What is the NABCEP PVSI exam fee?

The exam fee is $150 with no separate application fee. This makes it the most affordable NABCEP certification. If you need to retake, the re-exam fee is also $150.

How long do I have to schedule the PVSI exam?

Unlike other NABCEP exams where you have one to two years, PVSI candidates must take the exam within 6 months of application approval.

Can I take the NABCEP PVSI exam remotely?

Yes, the PVSI exam is available via live remote proctoring through Meazure Learning. You can take it from any location with a stable internet connection, webcam, and microphone.

How often must I renew NABCEP PVSI certification?

NABCEP PVSI certification must be renewed every 3 years. Renewal requires 8 hours of advanced PV training that specifically covers the National Electrical Code (NEC).