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The NABCEP PV Installation Professional (PVIP) exam consists of 70 multiple-choice questions (60 scored, 10 pilot) covering PV design, installation, commissioning, and maintenance based on NEC standards. Questions include complex, field-experience-based scenarios, NEC code calculations, safety practices, and O&M of older equipment.
Key Question Topics and Content: NEC Code Applications (Article 690 & 705): Calculations for voltage drop, conductor sizing, grounding methods, and overcurrent protection. System Design & Performance: Calculating inverter sizing, string sizing, shading analysis, and derate factors. Installation Practices: Mounting techniques, racking systems, and equipment grounding (e.g., grounding electrode system). Commissioning & Troubleshooting: Insulation resistance testing, Voc/Isc testing, and interpreting inverter fault codes. Safety: OSHA requirements and PPE.
Example Question Types: Math: Calculating AC output for a 15 kW system with a 0.90 derate factor after 5 years of 2% annual degradation. Code: Identifying appropriate grounding methods for ground-mounted arrays according to NEC Article 690. Field Scenario: Determining the cause of low insulation resistance in a 3-year-old system.
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