INTRODUCTION Solar pumping inverter obtains DC electric energy from the photovoltaic cell and converts it into electric energy to drive the water pump. According to the intensity of sunlight, the inverter adopts MPPT algorithm to adjust the output frequency and make maximum use of solar energy. SWP series solar pumping inverter is a flexible, easy-to-use and economical solar pumping inverter launched by Days energy according to the differentiated needs of customers. It aims to provide customers with economic and comprehensive economic benefit solutions.