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

1. A PV system includes a 15 kW array with a maximum power point voltage of 450V and current of 33.33A.
The inverter efficiency is 97%, and the AC output voltage is 240V. What is the AC output current under STC?

A) 62.5A
B) 60.6A
C) 64.8A
D) 58.5A

2. A 7KW/ 14 KWh multimode system has been installed at a residence, ac-couple with the customer's existing
6.7kwh ac PV system. The system providers uninterrupted power to a protect loads subpanel, which is connected to a refrigerator, Microwave, 1.0 ton are conditioner, three lightning circuit, and the 6.7kwac PV system. One month later, the homeowner moves additional circuits to the protected loads subpanel, substantially increasing the loads. Why would this cause, the backfed interconnection breaker in the main service panel to trip?

A) The toad exceeds the capacity of the interconnection breaker.
B) The main service panel is no longer compliant with NCC 705.12.
C) The total load exceeds the system's energy storage capacity of 14kWh.
D) The load «the protected loads subpanel exceeds the PV system ac rating by 25%.

3. A PV system has a 1000V DC array feeding a transformerless inverter. What is the minimum insulation rating for the DC conductors per NEC 690.35?

A) 600V
B) 1000V
C) 1500V
D) 2000V

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) 10 in-lb
C) 20 in-lb
D) 40 in-lb

5. A PV array is installed with a rapid shutdown system per NEC 690.12. The array is 15 feet from the service entrance. What is the maximum voltage allowed within the array boundary 30 seconds after shutdown initiation?

A) 120V
B) 30V
C) 240V
D) 80V

Solutions: