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

1. A 20 kW system has a measured output of 18 kW at STC. What is the total system loss?

A) 20%
B) 10%
C) 15%
D) 5%

2. A PV system includes a 600V DC disconnect with a fault current rating of 10 kA. The available fault current from the inverter is 12 kA. What must be done to comply with NEC 110.10?

A) Reduce the array size to lower fault current
B) No action needed; the rating is sufficient
C) Replace the disconnect with a 15 kA-rated unit
D) Install a current-limiting fuse upstream

3. A 15 kW system has a total derate factor of 0.90. After 5 years, output drops by 2% annually due to degradation. What is the AC output in year 5?

A) 12.9 kW
B) 13.5 kW
C) 11.5 kW
D) 12.2 kW

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

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

5. Per NEC 690.11, what is the maximum allowable DC voltage for a PV system requiring arc-fault circuit protection?

A) 150V
B) 600V
C) 80V
D) 1000V

Solutions: