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

1. Which of the following tests measures axial uplift when performing load testing of driven-pile foundation members

A) Resistance to twisting
B) Resistance to horizontal movement
C) Resistance to withdraw (pull-out) force
D) Resistance to downward (Sinking force

2. A PV system has a 1000V DC array feeding a transformerless inverter. What is the minimum insulation rating for the DC conductors per NEC 690.35?

A) 2000V
B) 600V
C) 1500V
D) 1000V

3. A PV array with 58 in. X 38 in modules in portrait orientation is to be mounted at a 35 tiit angle on a shingle roof that has a 5:12 pitch. Assuming the support leg is attached to the top of the modules and is perpendicular to its face, what is the length of the support leg for the modules?

A) 18.25 in.
B) 12.73 in.
C) 24.24 in.
D) 40.50 in.

4. A PV array's tilt is 15° at a latitude of 35°N. What is the annual energy loss compared to optimal tilt?

A) 6-8%
B) 3-5%
C) 1-2%
D) 10-12%

5. During a PV system inspection, an installer notices that the rapid shutdown system fails to de-energize the array within 30 seconds of initiation. What is the most likely cause based on NEC 690.12 requirements?

A) The system lacks a compatible rapid shutdown device
B) The rapid shutdown switch is installed more than 10 feet from the array
C) The array conductors exceed the maximum allowable voltage
D) The inverter is not listed for rapid shutdown compliance

Solutions: