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

1. A site survey indicates a residential roof with a 4:12 pitch facing 20° east of south. The local latitude is 35°N, and the optimal tilt for maximum annual production is equal to latitude. What adjustment should be made to compensate for the roof's orientation and tilt to achieve near-optimal output?

A) Rotate modules 20° west to face true south
B) Install adjustable racking to match 35° tilt
C) Increase array capacity by 5%
D) No adjustment needed; output loss is negligible

2. A grid-tied PV system uses a transformerless inverter with a maximum DC input of 1000V. The array consists of 20 modules, each with a Voc of 45V. What is the NEC 690.7 correction factor for a low temperature of -15° C if the temperature coefficient is -0.30%/°C?

A) 1.21
B) 1.12
C) 1.18
D) 1.15

3. A designer is selecting a charge controller for an off-grid system with a 6 kW PV array and a 48V battery bank. The array Isc is 130A. What is the minimum current rating for the charge controller?

A) 130A
B) 150A
C) 162.5A
D) 175A

4. An installer is working on a 1000V DC PV array. What is the minimum PPE required per NFPA 70E for arc flash protection?

A) Category 3 PPE
B) Category 1 PPE
C) Category 4 PPE
D) Category 2 PPE

5. Which of the following is an NEC-indicate means to identify PV source and output circuits at accessible points of termination connection, and splices?

A) Placards
B) Tagging
C) Conduct stickers
D) Insulation type

Solutions: