57101-11 Introduction to Solar Photovoltaics

57101-11 Introduction to Solar Photovoltaics The average solar irradiance is _______. - 1,000 W/m2 The organization that certifies PV installers is _______. - NABCEP The default azimuth angle for locations in the northern hemisphere is _______. - 180 degrees A PV cell is a type of ______. - A semiconductor What is the voltage when the current is 20A and the resistance is 12 ohms? - 240 volts Which of the following is an example of a direct-drive standalone system? - A DC-powered irrigation system Which of the following is true regarding a grid-interactive system? - It provides power when there is a grid outage. What is the resistance when the voltage is 120V and the amperage is 5A? - 24 ohms Which of the following is true regarding parallel circuits? - A parallel circuit provides multiple paths for current flow. What is the power when the current is 20A and the voltage is 120V? - 2,400 watts Wiring solar panels in series _____. - increases the voltage but does not affect the amperage. Wiring two 20v/5A solar panels in parallel produces _____. - 20V/10A Which of the following months would be likely to have the lowest insolation values? - December The peak sun hours for a site receiving 1,000 W/m2 for three hours and 900 W/m2 for five hours is ______. - 7.5 hours Which of the following is typically considered a BOS component? - Wiring What is the panel operating temperature under Standard Test Conditions? - 25*C (77*F) Which of the following statements is true regarding PV power? - PV systems help to offset power use during peak demand periods. Which of the following PV cells is likely to have the highest efficiency? - Monocrystalline Which of the following is often the result of repeated temperature cycling? - Burnt terminals Which of the following covers specific PV system components? - UL Standard 1703 Each battery cell produces ______. - 2V A 80 Ah battery from which 40 Ah has been withdrawn has undergone a DOD of _____. - 50% Per NEC Section 690.71(B)(1), residential PV batteries connected in series are limited to ________. - 48V What is the effect of temperature on irradiance? - The irradiance decreases by 50% for every ten-degree temperature increase. The best charge controller for use with sealed batteries is a ______. - PWM charge controller Strings of solar panels are likely to be connected