PV Installation Professional (PVIP) Board Certification

Question 1

A 20 kW array has a measured output of 16 kW at 800 W/m² irradiance. What is the performance loss due to irradiance?

A. 30%

B. 20%

C. 25%

D. 10%

Correct Answer: B

Question 2

Which circuits are on the utility side of a service point?

A. Feeders

B. Service conductors

C. Service lateral

D. Service entrance conductors

Correct Answer: B

Question 3

A homeowner is concerned that a 6kWdc PV system might be experiencing a performance issue. The homeowner has noticed what appears to be declining production. The installer analyzes the following data acquisition system (DAS) results for each year since the installation:

Given the data, which is the MOST likely conclusion to draw?

A. A combination of normal module degradation combined with cloudy weather has caused lower output in the past few years.

B. There is a problem with the DAS because the peak sun hours do not correlate with production values and the das should be repaired.

C. The system has experienced above-average degradation and a module warranty claim should be explored.

D. There is an intermittent inverter failure that is causing production to be lower than expected and the inverter should be repaired.

Correct Answer: A

Question 4

In the middle of a winter day, the data acquisition system for a ground-mounted PV system with large central inverters sends an email alert that system performance is at 50% based on irradiance and temperature performance calculations. No inverters are completely offline. The closed technician is a 4-hour drive from the site, and there are no cameras on site. Which is the BEST response to this situation?

A. Report the low performance to the inverter manufacturer and request that a technical be sent to the site for a warranty claim.

B. Review power output and weather conditions via the monitoring portal, and review local weather reports.

C. Call the data acquisition company to report a monitoring system failure.

D. Dispatch the technician to the site t investigate the low performance issue in person.

Correct Answer: B

Question 5

Per NEC 690.8, a PV source circuit has an Isc of 9.5A. What is the minimum ampacity required for the conductor?

A. 15.0A

B. 9.5A

C. 14.25A

D. 11.875A

Correct Answer: D

Question 6

A PV system is installed in a location with an average annual ambient temperature of 30°C. If the module's NOCT (Nominal Operating Cell Temperature) is 45°C, what is the expected cell temperature under standard operating conditions (800 W/m² irradiance)?

A. 55°C

B. 60°C

C. 45°C

D. 50°C

Correct Answer: A

Question 7

A metal condult containing an array circuit with Vmo of 400Vdc is connected to a metal enclosure at the location where the concentric knockouts have been punched by the manufacturer. Which method of attachment should be used?

A. Sealing locknut

B. Threaded coupling

C. Insulated bushing

D. Grounding bushing

Correct Answer: D

Question 8

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. 200A

B. 32A

C. 40A

D. 24A

Correct Answer: B

Question 9

A dwelling has a 200A main load center with a 150 main breaker. Which of the following is the MOST powerful 240V inverter that can be installed in the house using the existing main panelboard with a backfed breaker?

A. 9, 600W

B. 21, 600W

C. 17, 280W

D. 7, 689W

Correct Answer: C

Question 10

A PV output circuit requires a disconnecting means per NEC 690.13. Where must it be located?

A. Within sight of the inverter

B. At the main service panel

C. Within 10 feet of the array

D. At the point of interconnection

Correct Answer: A

Question 11

A module's Isc is 9A at STC. At 600 W/m² irradiance, what is the expected Isc?

A. 6.0A

B. 5.4A

C. 7.2A

D. 6.3A

Correct Answer: B

Question 12

Aerial lifts used to hoist equipment and PV modules to roof levels may be field modified for uses other than those intended by the manufacturer with which approval or certification?

A. Certified via the state material handling safely statutes

B. Certified in writing by the manufacturer or an NRTL

C. Tested and approval by the distributor of the equipment

D. Approval by the local AHJ for meeting safely regulations

Correct Answer: D

Question 13

Thermal imaging infrared cameras can be used to help find which of the following system operational issues?

A. Intensity of solar insolation to determine power output

B. Battery state of charge in a multimode system

C. Loose PV input circuit terminations in a combiner box

D. Blind spot fault in a source circuit

Correct Answer: D

Question 14

A PV system produces 12,000 kWh annually at a site with 1500 kWh/m²/year insolation. The array area is 50 m². What is the system efficiency?

A. 16%

B. 12%

C. 18%

D. 14%

Correct Answer: A

NABCEP PV Installation Professional (PVIP) Board Certification - PVIP Exam Practice Test

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