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

1. A PV technician is installing a 6.5KWac inverter using a 40A backfed breaker. The single line shows a 200A panelboard with a 200A breaker, but the installer finds that the panelbord actually has a 150A main breaker.
Which of the following is the CORRECT installation option?

A) Replace the 200A panel with a 150A panel.
B) Change the main circuit breaker to a 200A unit.
C) Complete the installation as noted above.
D) Install a 30A backfed circuit breaker.

2. A designer is selecting a charge controller for an off-grid system with a 6 kW PV array and a 48V battery bank. The array Isc is 130A. What is the minimum current rating for the charge controller?

A) 130A
B) 175A
C) 150A
D) 162.5A

3. A system's inverter output is 9 kW at 900 W/m² irradiance. What is the expected output at 1000 W/m²?

A) 10.0 kW
B) 9.5 kW
C) 10.5 kW
D) 11.0 kW

4. 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) 30 in-lb
B) 20 in-lb
C) 10 in-lb
D) 40 in-lb

5. A PV system's capacity factor is 18%. The array is 10 kW, and it operates 365 days/year. What is the annual energy output?

A) 15,768 kWh
B) 12,264 kWh
C) 21,024 kWh
D) 18,000 kWh

Solutions: