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(Go directly to NREL's NSRD main page)

 

• Ground stations TMY2/3 data files can be directly imported into PVsyst:
 

- First download the desired file from the web site referenced above.

 

TMY2: zipped files of 235 kB, 1961-1990 dataset (MTS1) -> download
   Choose the "DOS" format and store it in a temporary directory; then expand the file (these are self-extracting files, of the form   "12345.EXE").

 

TMY3: CSV file, 1.8 MB, 1991-2005 dataset (MTS2) -> download

          Please choose: Individual Station Files):

Either :     In alphabetical order by state and city

Or :           In numerical order by USAFN number.      
 

- The files are referenced as station code numbers. If desired you may rename them for easier identification.

- Returning in PVsyst, choose   "Databases"/"Import Meteo Data"/”NREL National Solar Resource Database”,  and follow the instructions on the screen. The site specifications (name, geographic coordinates) are automatically read from the TMY file.

Importing a TMY file will produce a PVsyst hourly meteo file (*.met) with Global and Diffuse irradiance, temperature and wind velocity,  as well as a geographic site file (*.sit).