The most prominent characteristic of this solar PV system is the direct current generated from the PV array advances through the grid-connected inverter, which converts the DC meets the requirement of mains electricity and then directly taps it into the mains grid, inside the grid-connected PV system, the electric power generated from PV array provides the power supply for AC load equipment, and the excess electricity will feed back to the grid. On rainy days or nights, if the PV array has not generated any electric energy or the generated electric energy cannot meet the load requirement, then the grids must provide power supply.


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