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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 module's Isc is 9A at STC. At 600 W/m² irradiance, what is the expected Isc?

A) 5.4A
B) 6.3A
C) 7.2A
D) 6.0A

3. A bifacial array gains 15% additional power from rear-side irradiance. If the front-side output is 10 kW, what is the total output?

A) 12.0 kW
B) 12.5 kW
C) 11.0 kW
D) 11.5 kW

4. A PV system is installed in a location with an average annual ambient temperature of 30°C. If the module's NOCT (Nominal Operating Cell Temperature) is 45°C, what is the expected cell temperature under standard operating conditions (800 W/m² irradiance)?

A) 45°C
B) 55°C
C) 50°C
D) 60°C

5. A ground-mount PV system is planned for a site with a soil bearing capacity of 2000 psf. The array footing design requires a minimum bearing pressure of 1500 psf. What is the safety factor for this installation?

A) 0.75
B) 1.5
C) 2.0
D) 1.33

Solutions: