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

1. A PV system has a nameplate capacity of 10 kW DC and operates with a total system derate factor of 0.85.
What is the expected AC output power under standard test conditions (STC)?

A) 9.0 kW
B) 10.0 kW
C) 8.5 kW
D) 7.5 kW

2. Inspection of a new PV installation shows that the dwelling uses a galvanized water pipe for its grounding electrode and that the PV system now shares the connection. Which of the following is an acceptable supplemental electrode method to ensure the integrity of having a grounding electrode?

A) Connecting the water pipe to the service entrance panel metal structure
B) Connecting the water pipe to a gas pipe that is known to be solidly grounded
C) Connecting the service panel to an auxiliary ground used by a lightning protection system
D) Connection the service panel to a copper-clad steel ground rod near the panel

3. During a site assessment, an installer identifies a 100-foot-tall tree 150 feet south of a proposed PVarray. The site latitude is 40°N. Will this tree cause shading on December 21st between 9 AM and 3 PM solar time?

A) Yes, shading will occur before 10 AM only
B) No, shading will not occur
C) Yes, shading will occur all day
D) Insufficient data to determine

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) 60°C
B) 50°C
C) 55°C
D) 45°C

5. Which of the following should a PV installer do during dc insulation resistance testing?

A) Connect the megohmmeters's negative terminal to the dc circuit insulation
B) Close ac and dc disconnects and have the system running for at least 5 minutes before testing.
C) Wait until is raining and all wiring is damp to conduct the test.
D) Remove surge suppression equipment from the circuit being tested.

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