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Emanuel Rodriguez

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  1. Hi, Some Solar Databases provide a TMY meteo data with P90 instead a value for interannual variability. I am not sure how to estimate the P90 production with this TMY P90 data. Could you please help me? I was thinking to simulate with TMY P90 meteo data as usual but then in the "Energy Management" menu set 0% for "interannual variability" and get the Energy P90 marked in the image below. This way I would be getting the uncertainties of the other sources such as PV modules, inverters, soiling and module quality loss and long term degradation. Do you have any experience or opinion on this matter? Thanks in advance. Emanuel
  2. Hi ASBRIC, I think you are doing it right. When you create a .SIT file you are just setting the place downloading just monthly meteo data, see image 1. So you get GHI, DHI, Tamb, Wind velocity and RHumidity. So PVsyst generates a synthetic meteo file hour by hour in order to calculate the simulation. See image below I do not know how can Pvsyst simulate the system (mainly losses) if no hourly calculations are performed. How did you get results without creating a .SIT file? As far as I know, the TMY is supposed to provide the "same data" (different format) as the .MET file. So the creation of a .MET form a TMY is just fomat conversion. To sum up, if you have a TMY file you should import it, create the .SIT and the .MET files after that you should run the simulation selecting the meteo data from .MET. BR, Emanuel
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