NABCEP PV INSTALLATION
PROFESSIONAL (PVIP) CERTIFICATION
EXAMINATION QUESTION AND
CORRECT ANSWERS(VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A
INSTANT DOWNLOAD PDF
1. The primary purpose of the NABCEP PV Installation Professional
certification is to validate competency in:
A. PV sales and marketing
B. Electrical engineering design theory
C. Safe and code-compliant installation of PV systems
D. Utility-scale power plant operation
Rationale: NABCEP PVIP focuses on verifying hands-on skills, safety, and
compliance for professional PV installers.
2. Which NEC Article governs solar photovoltaic systems?
A. Article 110
B. Article 240
C. Article 690
D. Article 705
Rationale: NEC Article 690 specifically covers requirements for solar photovoltaic
systems.
3. A PV module’s nameplate rating of 400 W is determined under:
A. NOCT conditions
B. Standard Test Conditions (STC)
, C. Site operating conditions
D. Maximum power tracking
Rationale: STC defines 1000 W/m² irradiance, 25°C cell temperature, and air
mass 1.5.
4. What is the function of a combiner box in a PV system?
A. Convert DC to AC
B. Combine multiple source circuits into fewer output circuits
C. Track maximum power
D. Provide grounding only
Rationale: Combiner boxes consolidate multiple PV string outputs.
5. Which device provides overcurrent protection for PV source circuits?
A. Inverter
B. Fuse or circuit breaker
C. Disconnect switch
D. Grounding electrode
Rationale: Overcurrent devices protect conductors from excessive current.
6. The maximum system voltage for residential PV systems in the U.S. is
commonly:
A. 150 V
B. 300 V
C. 600 V
D. 1000 V
Rationale: NEC permits PV systems up to 1000 V DC for many installations.
7. Which factor most directly affects PV module output?
A. Wind speed
B. Solar irradiance
C. Ground resistance
D. Conductor color
Rationale: Irradiance level directly determines power production.
, 8. What is the purpose of maximum power point tracking (MPPT)?
A. Protect against overcurrent
B. Convert DC to AC
C. Optimize power output from PV modules
D. Ground the system
Rationale: MPPT adjusts operating voltage/current for maximum power.
9. Which orientation generally maximizes annual energy production in the
Northern Hemisphere?
A. East-facing
B. West-facing
C. South-facing
D. North-facing
Rationale: South-facing arrays receive the most annual solar exposure.
10.What is the typical tilt angle for a fixed PV array to maximize annual
output?
A. Latitude minus 30°
B. Approximately equal to site latitude
C. Always 45°
D. Always flat
Rationale: Tilt near latitude balances seasonal sun angles.
11.Which NEC article governs grounding and bonding?
A. Article 690
B. Article 250
C. Article 705
D. Article 110
Rationale: Article 250 addresses grounding and bonding requirements.
12.A ground-fault protection device in a PV system is intended to:
A. Increase power output
B. Detect and interrupt ground faults
PROFESSIONAL (PVIP) CERTIFICATION
EXAMINATION QUESTION AND
CORRECT ANSWERS(VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A
INSTANT DOWNLOAD PDF
1. The primary purpose of the NABCEP PV Installation Professional
certification is to validate competency in:
A. PV sales and marketing
B. Electrical engineering design theory
C. Safe and code-compliant installation of PV systems
D. Utility-scale power plant operation
Rationale: NABCEP PVIP focuses on verifying hands-on skills, safety, and
compliance for professional PV installers.
2. Which NEC Article governs solar photovoltaic systems?
A. Article 110
B. Article 240
C. Article 690
D. Article 705
Rationale: NEC Article 690 specifically covers requirements for solar photovoltaic
systems.
3. A PV module’s nameplate rating of 400 W is determined under:
A. NOCT conditions
B. Standard Test Conditions (STC)
, C. Site operating conditions
D. Maximum power tracking
Rationale: STC defines 1000 W/m² irradiance, 25°C cell temperature, and air
mass 1.5.
4. What is the function of a combiner box in a PV system?
A. Convert DC to AC
B. Combine multiple source circuits into fewer output circuits
C. Track maximum power
D. Provide grounding only
Rationale: Combiner boxes consolidate multiple PV string outputs.
5. Which device provides overcurrent protection for PV source circuits?
A. Inverter
B. Fuse or circuit breaker
C. Disconnect switch
D. Grounding electrode
Rationale: Overcurrent devices protect conductors from excessive current.
6. The maximum system voltage for residential PV systems in the U.S. is
commonly:
A. 150 V
B. 300 V
C. 600 V
D. 1000 V
Rationale: NEC permits PV systems up to 1000 V DC for many installations.
7. Which factor most directly affects PV module output?
A. Wind speed
B. Solar irradiance
C. Ground resistance
D. Conductor color
Rationale: Irradiance level directly determines power production.
, 8. What is the purpose of maximum power point tracking (MPPT)?
A. Protect against overcurrent
B. Convert DC to AC
C. Optimize power output from PV modules
D. Ground the system
Rationale: MPPT adjusts operating voltage/current for maximum power.
9. Which orientation generally maximizes annual energy production in the
Northern Hemisphere?
A. East-facing
B. West-facing
C. South-facing
D. North-facing
Rationale: South-facing arrays receive the most annual solar exposure.
10.What is the typical tilt angle for a fixed PV array to maximize annual
output?
A. Latitude minus 30°
B. Approximately equal to site latitude
C. Always 45°
D. Always flat
Rationale: Tilt near latitude balances seasonal sun angles.
11.Which NEC article governs grounding and bonding?
A. Article 690
B. Article 250
C. Article 705
D. Article 110
Rationale: Article 250 addresses grounding and bonding requirements.
12.A ground-fault protection device in a PV system is intended to:
A. Increase power output
B. Detect and interrupt ground faults
