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

1. A connector not listed to be used in a concealed location and being used as a disconnect for PV equipment shall comply with which of the following?

A) The grounding member shall be last to make and first to break contact with the mating connector
B) The connector shall be installed so as to guard against inadvertent with live parts by persons.
C) The connector shall have a non-polarized configuration.
D) The grounding member shall be interconnectchangeable with receptacles in other electrical systems.

2. An installer troubleshooting a ground-mounted array finds It to be performing as expected most of the time, but a ground-fault error is indicated on hot days. The inverter is in a shaded location. Which of the following should the installer check for FIRST when troubleshooting this array?

A) Pinched module wiring
B) Loose module connections
C) High voltage
D) Intermittent ground connections

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

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

4. The point-of-utility connection of a residential utility-interactive PV system is in the main distribution panel.
If the busbars of the main distribution panel are rated at 200A, and if the distribution panel has a 200A main breaker, the rated output current of the inverter cannot exceed.

A) 24A
B) 40A
C) 200A
D) 32A

5. A PV array is installed at a site with an annual average temperature of 25°C and a maximum recorded temperature of 45°C. The module Voc is 50V at STC, with a temperature coefficient of -0.32%/°C. What is the maximum string voltage at the coldest expected temperature of -10°C?

A) 580V
B) 600V
C) 540V
D) 560V

Solutions: