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

1. A module's power is 340W at STC. At 700 W/m² and 40°C with a coefficient of -0.38%/°C, what is the output?

A) 248W
B) 236W
C) 224W
D) 260W

2. A 10 kW array produces 14,000 kWh annually. What is the specific yield in kWh/kW?

A) 1400
B) 1200
C) 1800
D) 1600

3. While surveying a potential three-phase project, an installer measures the voltage at the point of utility interconnection. The results are as follows:
* Phase to phase: 240V
* Phase A neutral: 120V
* Phase B neutral: 208V
* Phase C neutral: 120V
Which is a likely cause of these reading?

A) Supply-side ground fault
B) Missing ground in the transformer
C) High-leg transformer configuration
D) Phase-to-phase power imbalances

4. A system's inverter efficiency drops from 97% to 94% due to aging. What is the percentage increase in energy loss?

A) 2.1%
B) 6.0%
C) 4.5%
D) 3.2%

5. 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) 40A
B) 35A
C) 45A
D) 30A

Solutions: