euron Posted March 13, 2023 Report Share Posted March 13, 2023 To whom it may concern, I have a solar power plant with total of installed power 180 kWp. How is ti possible that in the simulation I have power that exceeds that number? Quote Link to comment Share on other sites More sharing options...
developer_mh Posted March 14, 2023 Report Share Posted March 14, 2023 Hi grlnat, the 180 kWp is the so called peak power, measured at Standard Test Conditions (STC). The conditions are 1000 W/m² irradiance, 25 °C module temperature and and air mass of 1.5 (but that is not important here). That means, if your modules receive 1000 W/m² of irradiance and have 25°C module temperature, they will output 180 kWp. Accordingly, if the irradiance is lower or higher, the output of the modules will be less or more that the 180 kWp. The irradiance varies greatly during the year and during day. And of course, clouds can have a very strog influence on the irradiance. Clouds can even reflect parts of the sun rays, leading to so called irradiance enhancements. In those situations, the irradiance values can go far beyond their typical values. So, in a usual continental climate it is common to have irradiance values from 0 to 1300 W/m². That is of course, if you look at the values in one-minute resolution. https://help.valentin-software.com/pvsol/en/calculation/irradiation/ Hope that helps, kind regards, Martin Quote Link to comment Share on other sites More sharing options...
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