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

1. Which temperature coefficient is used in the calculation to verify energy production of a PV system?

A) OptionA
B) OptionC
C) OptionD
D) OptionB

2. 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) 18%
B) 12%
C) 16%
D) 14%

3. According to the NEC, if the PV system disconnect and the building service disconnect are at different locations, there MUST be a/an:

A) Means of locking out both disconnects when the PV system inverter is being serviced.
B) Interface that shuts down the PV system if the utility connection is lost.
C) Permanent plaque or directory that indicates the location of the PV utility connection.
D) Permanent plaque or directory that indicates the locations of both disconnects.

4. A ground-fault protection device (GFPD) trips during commissioning. What is the most likely cause per NEC
690.5?

A) Overcurrent in the inverter output
B) Insulation failure between a conductor and ground
C) Open circuit in the array
D) Reverse polarity in a source circuit

5. A PV system includes a 15 kW array with a maximum power point voltage of 450V and current of 33.33A.
The inverter efficiency is 97%, and the AC output voltage is 240V. What is the AC output current under STC?

A) 64.8A
B) 62.5A
C) 58.5A
D) 60.6A

Solutions: