Two major factors determine the conversion efficiency of photovoltaic inverters

What is the conversion efficiency of a PV inverter? In fact, the conversion rate of a PV inverter refers to the efficiency at which an inverter converts electricity generated by a solar panel into electricity. In photovoltaic power generation systems, inverters convert the DC power generated by solar panels into AC power and transfer these AC power to the power grid of the power company. The conversion efficiency of the inverter is high, and electricity for home use and sale can be used. increase.

There are two main factors that determine the conversion efficiency of photovoltaic inverters:

First, when converting a DC current into an AC sine wave, it is necessary to use a power semiconductor circuit to switch the DC current. At this time, the power semiconductor heat will cause loss, but this loss can be reduced by improving the design of the switching circuit. Reduced to the minimum.

The second is to improve efficiency by virtue of inverter control experience. The output current and voltage of the solar panel will change with the sunshine and temperature, and the inverter can optimally control the current and voltage so that it can reach the maximum amount of power, that is, it can find the best in the shortest time. Power point, the higher the conversion efficiency. This control characteristic of the inverter varies depending on the products of each manufacturer, and the conversion efficiency is also different. For example, although some inverters have high conversion efficiency at the maximum power output, the conversion efficiency at low power output is very low; there is also the conversion efficiency that remains at the same time from low power output to high power output. Therefore, when selecting the inverter, it is necessary to consider the matching with the output characteristics of the solar panel set.

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