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

1. With all other environmental parameters being the same, which would be the expected reduction in KM performance of a PV system after an irradiance drop from 810w/m2 to 740w/m2?

A) 8.6%
B) 7.4%
C) 10.2%
D) 9.5%

2. A 12 kW array has a measured output of 10 kW at STC due to mismatch losses. What is the mismatch loss percentage?

A) 15%
B) 12%
C) 16.7%
D) 10%

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

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

4. The following dc portion of a PV schematic (functionally grounded conductor not shown) is submitted to the building official for permit approval. The building official, who also is he AHJ, allow the system to be installed by requiring what NEC-required MINIMUM size equipment grounding conductor at Location A?

A) #8 copper
B) #6 aluminum
C) #10 copper
D) #12 aluminum

5. In the middle of a winter day, the data acquisition system for a ground-mounted PV system with large central inverters sends an email alert that system performance is at 50% based on irradiance and temperature performance calculations. No inverters are completely offline. The closed technician is a 4-hour drive from the site, and there are no cameras on site. Which is the BEST response to this situation?

A) Call the data acquisition company to report a monitoring system failure.
B) Dispatch the technician to the site t investigate the low performance issue in person.
C) Review power output and weather conditions via the monitoring portal, and review local weather reports.
D) Report the low performance to the inverter manufacturer and request that a technical be sent to the site for a warranty claim.

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