The generating system for grid-connected PV system transmit electricity into the power network through grid-connected inverters directly, without power storage in the accumulator batteries, by transforming the solar energy into electric energy, the grid-connected inverter adopts the tracking technology with largest efficiencies, and transmit the electricity energy transformed from solar energy into the power network up to the hilt. Grid-connected PV system is the direction for power generation of solar energy, which presents the most attractive technologies for energy utilization in the 21 st century