As far as photovoltaic inverter is concerned, conversion efficiency is an important parameter, directly related to the amount of power generation, indirectly increasing the cost of investment in photovoltaic power plants. It is thus the common pursuit of all photovoltaic inverter manufacturers to provide conversion efficiency, efficiency is often a little less than that percentage. Such a small point will give developers much effort.
Since we understand the importance of the efficiency of photovoltaic inverter, it is necessary to avoid these problems which affect the efficiency of photovoltaic inverter. The following two main reasons that affect the conversion efficiency of photovoltaic inverter are analyzed by researchers.
Firstly, when converting DC current into AC sinusoidal wave, the DC current should be switched by using power semiconductor circuit. At this time, the heating of power semiconductor will cause loss, but the loss can be minimized by improving the design of switching circuit.
The two is to improve efficiency by controlling experience of inverter. The output current and voltage of solar panels change with sunshine and temperature, and the inverter can optimize the control of current and voltage to maximize the amount of power, that is, the shorter the time to find the best power point, the higher the conversion efficiency. The control characteristics of the inverter will vary with the manufacturer\'s products, and the conversion efficiency is also different. For example, some inverters have very high conversion efficiency at maximum power output, but low conversion efficiency at low power output; others have kept average conversion efficiency at all times from low power output to high power output. Therefore, the matching between the output characteristics of the solar panel and the inverter should be considered when selecting the inverter.