22 Sep '13, 2pm

The PVWatts calculator determines #energy production & cost $avings of pv systems based on your location & weather.

NREL's PVWattsTM calculator determines the energy production and cost savings of grid-connected photovoltaic (PV) energy systems throughout the world. It allows homeowners, installers, manufacturers, and researchers to easily develop estimates of the performance of hypothetical PV installations. The PVWatts calculator works by creating hour-by-hour performance simulations that provide estimated monthly and annual energy production in kilowatts and energy value. Users can select a location and choose to use default values or their own system parameters for size, electric cost, array type, tilt angle, and azimuth angle. In addition, the PVWatts calculator can provide hourly performance data for the selected location. Using typical meteorological year weather data for the selected location, the PVWatts calculator determines the solar radiation incident of the PV array and the...

Full article: http://www.nrel.gov/rredc/pvwatts/

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