There is no need to purchase an additional MPPT controller, which saves costs. MPPT, the abbreviation of Maximum PowerPoint Tracking, is "Maximum Power Point Tracking" in Chinese. It means that the inverter adjusts the output power of the photovoltaic array according to the characteristics of different external environment temperature and light intensity, so that the photovoltaic array always outputs the maximum power. The role of MPPT: Because the solar cell receives the influence of external factors such as light intensity and environment, its output power changes, and the light intensity emits more electricity. The inverter with MPPT maximum power tracking is to make full use of the solar cell and make it run. At the maximum power point. That is to say, under the condition of the same solar radiation, the output power after MPPT will be higher than that before MPPT, which is the function of MPPT.