The point-of-utility connection of a residential utility-interactive PV system is in the main distribution panel. If the busbars of the main distribution panel are rated at 200A, and if the distribution panel has a 200A main breaker, the rated output current of the inverter cannot exceed.
What is the maximum allowable voltage drop for a PV source circuit conductor run of 100 feet, using 10 AWG copper wire, if the system operates at 48V DC and the design specifies a 2% voltage drop?
During a site assessment, an installer identifies a 100-foot-tall tree 150 feet south of a proposed PVarray. The site latitude is 40°N. Will this tree cause shading on December 21st between 9 AM and 3 PM solar time?
Which insulation color is allowed for a current-carrying root top dc conductor on a functionally grounded 6kw PV system?
A PV array produces 10 kW at 25°C. At 50°C with a coefficient of -0.45%/°C, what is the output?
A 5 kW PV system has a derate factor of 0.82. The site receives 5.5 PSH daily. What is the expected daily AC energy output?
A bifacial PV module has a rated power of 350W on the front side and a bifaciality factor of 70%. If the rear side receives 200 W/m² of irradiance, what is the total power output under STC front-side conditions (1000 W/m²)?
During a PV system inspection, an installer notices that the rapid shutdown system fails to de-energize the array within 30 seconds of initiation. What is the most likely cause based on NEC 690.12 requirements?
A PV system has a nameplate capacity of 10 kW DC and operates with a total system derate factor of 0.85. What is the expected AC output power under standard test conditions (STC)?
A 15 kW system has a total derate factor of 0.90. After 5 years, output drops by 2% annually due to degradation. What is the AC output in year 5?
