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

1. An installer is terminating PV conductors in a combiner box. What is the minimum torque specification for a
10 AWG connection if not specified by the manufacturer?

A) 20 in-lb
B) 30 in-lb
C) 10 in-lb
D) 40 in-lb

2. A PV system's annual energy production is 15,000 kWh. After maintenance, production increases by 5%.
What is the new annual output?

A) 15,750 kWh
B) 16,250 kWh
C) 15,500 kWh
D) 16,000 kWh

3. A PV system uses 10 AWG USE-2 wire for a 150-foot source circuit run with an Isc of 8A. The terminals are rated at 75°C. What is the ampacity of the conductor after applying NEC temperature and conduit fill adjustments at 35°C?

A) 30A
B) 40A
C) 45A
D) 35A

4. A 10 kW PV system produces 8 kW AC under STC. After one year, output drops to 7.2 kW. What is the most likely maintenance issue?

A) Soiling on modules
B) Module degradation
C) Loose connections
D) Inverter inefficiency

5. A module's STC power is 300W, with a temperature coefficient of -0.40%/°C. At 65°C, what is the power loss percentage?

A) 12%
B) 14%
C) 18%
D) 16%

Solutions: