NABCEP PVIP - PV Installation Professional (PVIP) Board Certification
A 1. 100 ft, 2 ranch home with cathedral callings has a 14 ft. x 41 ft. 8 in , south-facing , composite shingle roof. An engineer has determined that the home’s 2 in, x 6 in. on-center roof rafters are strong enough to gold a solar electric system. The system will have 62.25 in. x 32.50 in. modules with a 1-in gap between modules and a standard twin-rill mounting system number of modules that can fit on the roof on under these conditions?
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 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?
The following dc portion of a PV schematic (functionally grounded conductor not shown) is submitted to the building official for permit approval. The building official, who also is he AHJ, allow the system to be installed by requiring what NEC-required MINIMUM size equipment grounding conductor at Location A?
Inspection of a new PV installation shows that the dwelling uses a galvanized water pipe for its grounding electrode and that the PV system now shares the connection. Which of the following is an acceptable supplemental electrode method to ensure the integrity of having a grounding electrode?
A PV system’s inverter displays a ground-fault error. What is the first troubleshooting step?
A 10 kW PV array uses 300W modules with a Voc of 40V and an Isc of 9A. The inverter has a maximum DC input of 600V and 25A. What is the maximum number of modules that can be connected in a single string?
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?
According to the 2020 National Electrical Code (NEC), what is the minimum required working clearance in front of a 1000V DC PV inverter installed in a non-dwelling unit?
A PV system interconnects at a 480V three-phase service. The inverter output current is 20A per phase. What is the minimum size of the equipment grounding conductor (EGC) per NEC 250.122 if the OCPD is 30A?
