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

1. 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) 600V
B) 560V
C) 540V
D) 580V

2. A homeowner is weighing the PV module options for a roof-mounted solar array. Which is a correct option to present to the homeowner?

A) Polycrystalline modules are more shade-tolerance than either amorphous or monocrystalline modules and allow a larger array to be installed, including in area where shading could be seasonally problematic.
B) Rapid shutdown requirements within 1 ft of the array boundary.
C) Microinverters can be installed with either polycrystalline or monocrystalline modules, negating the need for rapid shutdown compliance.
D) Building-integrated PV shingles will be flush or nearly flush with other shingles, but the electrical energy produced will be less than polycrystalline or monocrystalline modules.

3. A ground-mounted PV system operating with an open-critical voltage of 550V is in a public park. Which installation procedure will meet NEC requirements for protecting the public from potential electric shock?

A) Mount the PV modules on a one-axis (north-south) tracker, with supporting structures listed to UL 2703.
B) Install a physical barrier on the back of the PV modules that prevent that prevents the conductors from being touched.
C) Ground the PV module frames, but not the mounting racks, to local grounding electrodes.
D) Install PV modules with plastic, insulating the frames, and connect to a grounding electrode at the array.

4. A module's STC power is 300W, with a temperature coefficient of -0.40%/°C. At 65°C, what is the power loss percentage?

A) 14%
B) 16%
C) 12%
D) 18%

5. A rooftop PV system is being installed on a residential building with a 30-degree tilt angle. The modules are oriented directly south in a location where the solar noon altitude on December 21st is 30 degrees. What is the minimum distance required between two rows of modules to avoid shading between 9 AM and 3 PM solar time, assuming the module height is 3 feet?

A) 3 feet
B) 6 feet
C) 12 feet
D) 9 feet

Solutions: