PV grid-connected power system includes PV modules, grid-connected inverter, meter and power switch board. The PV modules convert the solar energy into the DC power. Then the grid-connected inverter converts the DC power into the sine wave AC power which has the same frequency and phase with the grid voltage. The AC power supply the local loads and other feed in the grid partly. Features: Wide DC input voltage range DSP controller High efficiency by using advanced IGBT and IPM MPPT( Maximum power point tracking) technology High efficiency In accordance with international standards Quick and easy installation Operation parameters can be adjusted via LCD and keys The perfect protection function Designed to suitable for critical grid environment