You can use the Download buttons on SAM's Location and Resource input page to download NSRDB data directly from SAM. The NREL National Solar Radiation Database (NSRDB) provides free time series weather data for many countries of the world. Where to find Solar Resource Data to Use with SAM The Help system is available in SAM from the software's Help menu, and as a PDF file on the Download page.įor a description of SAM's weather file formats, see the "Weather File Formats" chapter in SAM's Help system, or download the PDF excerpt from the Weather Data Publications page. The solar resource and meteorological data in a SAM weather file may have been developed from ground measurements, data from a satellite, or a combination of the two.įor more information about weather data for SAM, see the "Weather Data" chapter in SAM's Help system. A weather file may contain typical-year data that represents long-term historical data or single-year data for a particular year. The data describes the solar resource or wind resource at a particular location. A SAM weather file is a text file that contains one year's worth of data in hourly or subhourly time steps.
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