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NOTICE!
Site Specific Data Calculator (Version 1) will no longer be supported after 2014.

Please use the most current version PVWatts®.


Site Specific Data Calculator (Version 1)

The Site Specific Data Calculator (Version 1) allows users to select a photovoltaic (PV) system location from a defined list of options. For locations within the United States and its territories, users select a location from a map of 239 options. For international locations, users select a location from a drop-down menu of options.

The Site Specific Data Calculator uses hourly typical meteorological year (TMY) weather data and a PV performance model to estimate annual energy production and cost savings for a crystalline silicon PV system. For locations in the United States and its territories, the Site Specific Data Calculator uses 1961-1990 National Solar Radiation Data Base (NSRDB) TMY2 data. For other locations, it uses TMY data from the Solar and Wind Energy Resource Assessment Programme, the International Weather for Energy Calculations, and the Canadian Weather for Energy Calculations. The Site Specific Data Calculator offers data only for defined locations. If your U.S. location is not included, you should use the most current version of PVWatts®.

To use the Site Specific Data Calculator (Version 1), see: