A PV monitoring system (PVMS) for large-scale photovoltaic farm-II: system design

Abstract

Solar energy is one of the most popular clean energy sources that mankind can rely on in the future. To realize the full use of solar energy, nowadays both grid-connected and off-grid photovoltaic systems are put into use. A grid-connected photovoltaic system is connected to the grid through an inverter by which it feeds power into AC loads when sunlight is available. An off-grid system, however, can directly power DC loads without the use of an inverter. In remote areas where a power grid is unavailable, off-grid solar system will be served as the sole source of electricity.