Aerial lifts used to hoist equipment and PV modules to roof levels may be field modified for uses other than those intended by the manufacturer with which approval or certification?
Which of the following is the required MINIMUM width of the working space In front of ac disconnect equipment?
Per NEC 690.4, who is qualified to install a PV system?
A PV system installation utilizes micro inverters connected to each module of the array. Each micro inverter has a nominal rated output of 250WV. Single phase. The microinverters are listed so that multiple inverters may be connected in parallel to a single feeder circuit, and each inverter has an cable and connector rated for 30A. What is the MAXIMUM number of inverters that may be wired together on a single 30A feeder circuit?
A bifacial array gains 15% additional power from rear-side irradiance. If the front-side output is 10 kW, what is the total output?
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?
A PV array’s tilt is 30° at a latitude of 40°N. What is the winter energy loss compared to optimal tilt?
A maintenance inspection reveals cracked module glass. What is the immediate action?
A 10 kW array produces 14,000 kWh annually. What is the specific yield in kWh/kW?
Which load path connections need to be analyzed when determining live and dead loads on a PV array system installed directly to a metal seam roof?
TESTED 19 Jun 2025