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 meeting 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.
Also known as access point. It means the node of the transformer which is directly connected to the grid for PV power stations connected to the public grid through transformers, or the converging point of the output of PV power stations for PV power stations connected to the public grid without transformers.
“KWh”: kilowatt-hour, a unit of energy. The standard unit of energy used in the electric power industry. One kilowatt-hour is the amount of energy that would be produced by a power generator producing one thousand watts for one hour.