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

1. A PV system interconnects at a 480V three-phase service. The inverter output current is 20A per phase. What is the minimum size of the equipment grounding conductor (EGC) per NEC 250.122 if the OCPD is 30A?

A) 10 AWG
B) 14 AWG
C) 8 AWG
D) 12 AWG

2. A system commissioning test requires verifying rapid shutdown functionality. What is the maximum time allowed for voltage to drop below 30V per NEC 690.12?

A) 30 seconds
B) 60 seconds
C) 20 seconds
D) 10 seconds

3. 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) 420W
B) 385W
C) 449W
D) 490W

4. A homeowner is weighing the PV module options for a roof-mounted solar array. Which is a correct option to present to the homeowner?

A) Polycrystalline modules are more shade-tolerance than either amorphous or monocrystalline modules and allow a larger array to be installed, including in area where shading could be seasonally problematic.
B) Building-integrated PV shingles will be flush or nearly flush with other shingles, but the electrical energy produced will be less than polycrystalline or monocrystalline modules.
C) Microinverters can be installed with either polycrystalline or monocrystalline modules, negating the need for rapid shutdown compliance.
D) Rapid shutdown requirements within 1 ft of the array boundary.

5. A system's inverter output is 9 kW at 900 W/m² irradiance. What is the expected output at 1000 W/m²?

A) 9.5 kW
B) 10.5 kW
C) 11.0 kW
D) 10.0 kW

Solutions: