A 15 kW array has a PR of 0.88 and 1600 kWh/m²/year insolation. What is the annual output?
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?
A 10 kW system has a PR of 0.82 and operates at 4.8 PSH. What is the monthly output?
A 5 kW system has a daily output of 20 kWh at 5 PSH. What is the total derate factor?
While surveying a potential three-phase project, an installer measures the voltage at the point of utility interconnection. The results are as follows:
* Phase to phase: 240V
* Phase A neutral: 120V
* Phase B neutral: 208V
* Phase C neutral: 120V
Which is a likely cause of these reading?
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?
Which of the following tests measures axial uplift when performing load testing of driven-pile foundation members
Which electrical connection requires the use of a torque device to complete the connection per NEC requirements?
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 technician is installing a 6.5KWac inverter using a 40A backfed breaker. The single line shows a 200A panelboard with a 200A breaker, but the installer finds that the panelbord actually has a 150A main breaker. Which of the following is the CORRECT installation option?
