The Clearness index of the best clear days is very low with respect to the clear day model. Some sites especially in tropical climate have a very high DIF which is out of PVsyst internal default limits. Solargis also supports this format for such cases when last versions of PVsyst are not available. This option is also suitable when using older data formats which are not supported anymore. Other time steps like sub-hourly or daily are also admitted in PVsyst. Please note that in many regions the time zone based on longitudinal reference will deviate from the legal time. Importing Solargis weather info contained in csv hourly files when working with PVsyst takes only few seconds tested in version 6.
Other option is using a Time series file, from which several separated one year periods for specific years can be created in PVsyst weather database. One option is using a Typical Meteorological Year TMY file, which summarizes weather conditions in one single year of hourly data. PVsyst users can proceed in two complementary ways when importing Solargis hourly data. PVsyst simulation engine runs the simulation taking into account global horizontal irradiation, diffuse horizontal irradiation and temperature and wind speed if available. In PVsyst software the process of importing Solargis values of irradiation and temperature is very easy and straight forward.
