What is the reason of low efficiency of photovoltaic power station system?

The system efficiency of photovoltaic power station, know very little about the industry. Many people think of photovoltaic power plant efficiency is 75% when the design The efficiency of 80%, then run process should be in accordance with the operation efficiency. So many users on the power system efficiency issued a lot of

the industry know little about the system efficiency of photovoltaic power station. Many people think that the efficiency of the photovoltaic power station design is 75% 80%, so should be run according to the efficiency at runtime. As a result, many users expressed many opinions on the efficiency of power system, the efficiency of how could be as high as 95% today? Why only 55% efficiency of yesterday? Why only 65% efficiency of this month? This different from the traditional concept. What's the problem with my plant? TAOKE monitoring system has a problem? In fact, there is no need to feel surprised because the system efficiency of photovoltaic power station changes with light intensity, and radiation efficiency is lower, the lower the efficiency. When radiation of 1000 watts per square metre, efficiency loss less than 5% ( Of course, this is the temperature is not high season) ； What reason is this? Mainly include the following: the first is the wastage of the components, inverter, cable, etc. Not as linear change as we imagine. Second, when radiation is low ( It's cloudy or rain) , there is a phase is in series voltage is too low, inverter can't start. ( Radiation dose is cumulative) Third, the inverter has the certain consumption ( Consumption changing with load is small) , which accounted for a significant proportion of electricity under low radiation, results in the decrease of system efficiency.