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NABCEP PV Installation Professional (PVIP) Board Certification Sample Questions:

1. A bifacial PV module has a rated power of 350W on the front side and a bifaciality factor of 70%. If the rear side receives 200 W/m² of irradiance, what is the total power output under STC front-side conditions (1000 W
/m²)?

A) 490W
B) 420W
C) 385W
D) 449W

2. A PV array is tested with an IV curve tracer. The fill factor is 0.70, lower than the expected 0.80. What does this indicate?

A) Series resistance increase
B) Shunt resistance decrease
C) Open-circuit voltage drop
D) Short-circuit current rise

3. A module's Voc is 40V at STC. At -5°C with a coefficient of -0.33%/°C, what is the Voc?

A) 44.0V
B) 42.0V
C) 45.0V
D) 43.0V

4. A PV system is installed on a dwelling with a single-phase 240V service. The inverter output is 7.2 kW. What is the minimum service conductor size per NEC 705.12 if the existing load is 50A?

A) 2 AWG
B) 1/0 AWG
C) 1 AWG
D) 2/0 AWG

5. When performing a system checkout after completing the installation, what is the SAFEST sequence of tasks to detect installation errors before closing any disconnects to the inverter, charge controller, or batteries?

A) Perform visual inspection, install source circuit fuses, and measure open-circuit current.
B) Perform visual inspection, check polarity and measure open-circuit voltage.
C) Install source circuit fuses, verify that all equipment-grounding conductors are secure, and measure ac line voltage.
D) Perform visual inspection, install source circuit fuses, and measure open-circuit voltage.

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