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

1. A PV array's output drops by 8% due to shading from 10 AM to 2 PM. If unshaded output is 12 kW, what is the shaded output?

A) 11.0 kW
B) 10.6 kW
C) 11.2 kW
D) 10.0 kW

2. A site has an average wind speed of 25 mph and is classified as Exposure Category C per ASCE 7. What is the minimum wind design speed for the PV array structure?

A) 110 mph
B) 130 mph
C) 150 mph
D) 90 mph

3. A 15 kW array has a PR of 0.88 and 1600 kWh/m²/year insolation. What is the annual output?

A) 24,000 kWh
B) 22,440 kWh
C) 19,800 kWh
D) 21,120 kWh

4. A 10 kW PV array uses 300W modules with a Voc of 40V and an Isc of 9A. The inverter has a maximum DC input of 600V and 25A. What is the maximum number of modules that can be connected in a single string?

A) 14
B) 16
C) 12
D) 15

5. A PV system combiner box contains six source circuits, each with an Isc of 8A. The output conductor is 6 AWG THWN-2 copper rated at 90°C. What is the maximum allowable OCPD rating per NEC?

A) 80A
B) 70A
C) 50A
D) 60A

Solutions: