Il Centro EPSON Meteo collabora con SunXman

SunXman per la propria piattaforma PV Asset Manager ha scelto come partner il Centro EPSON Meteo che fornirà i dati di irraggiamento al suolo con dettaglio riferito alle coordinate geografiche degli impianti, sulla base di rilevazioni da satellite meteorologico.

EPSON Meteo è una delle strutture private di ricerca applicata e di previsione in ambito meteorologico e climatologico più accreditate d’Europa e riveste da anni un ruolo di leader per la meteorologia in tutti i settori dell’energia.

WHAT IS THE “PR NET LOSS DUE TO TEMPERATURE”? WHAT IS FOR?

English

This indicator is particularly important as the photovoltaic modules typically lose a 0.45% productivity for each centigrade degree of temperature of the cells above 25 degrees of temperature. In a summer day, in the presence of high solar radiation, the cell temperature can arrive for example at 60 centigrade degrees, ie 35 degrees over the nominal 25, with a loss of productivity (PR) of the order of 15%.

WHAT IS THE MEANING OF “LOST SOLAR HOURS”?

English

Lost solar hours = solar energy loss, calculated and weighed on different inclined planes of different sections of a photovoltaic plant that are not producing the expected energy output for a malfunction.
Eg if 100% of a plant is shut down for an hour in which the solar irradiation was 0.6 kWh/sqm, it will be lost 0.6 solar hours; if it was stopped only 50% of the plant, it would have lost 0.3 solar hours.

What is PR?

English

The PV plant performance PR (Performance Ratio) is normally defined as follows:

PR (%) = actual energy yield / solar energy input through PV panels

Where:           

  • Actual energy yield is expressed in kWh / kWp, which is the energy measured by the output meter divided by the PV plant rated output
  • Solar energy is expressed in kWh/m2
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Our mission is to provide entrepreneurs and top management timely and clear indicators on the performance of their business, not only with respect to the provisional data, but also compared to those achieved by the best practice.