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

1. A system's performance ratio (PR) is calculated as 0.85. If the array capacity is 10 kW and PSH is 5, what is the daily AC output?

A) 45 kWh
B) 42.5 kWh
C) 40 kWh
D) 50 kWh

2. On a PV system larger than 100kw, which PV array design will provide the HIGHEST degree of performance monitoring.
Granularity, and ease of troubleshooting performance issues?

A) Multiple-string inverter system with data acquisition system located at each dc combiner
B) Central inverter with data acquisition system located at the inverter.
C) Multiple-string inverter system with data acquisition system located at each inverter.
D) Multiple-string inverter system with monitored dc-to-dc converters located at each module

3. 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) Intermittent ground connections
C) Loose module connections
D) High voltage

4. Per NEC 690.4, who is qualified to install a PV system?

A) Only a NABCEP-certified installer
B) A journeyman with PV experience
C) A licensed electrician or supervised trainee
D) Anyone with basic electrical knowledge

5. An 8 AWG bare copper equipment ground conductor (EGC) is wire tied to the module mounting structure of a commercial rooftop solar array. After a few years of operation, some spots on the EGCbegin to turn a green color and appear to be corroding more significantly that other places. What would the MOST likely cause of the problem?

A) Array racking touching the EGC at multiple points
B) Nyton wire ties in contact with the copper wire
C) Bypass dlode failures inducing current on the EGC
D) A break in the EGC, leaving the array ungrounded

Solutions: