Access data and analysis services that provide access to solar resource data and NREL models.
Freely available downloads of The National Solar Radiation Database.
Provides access to photovoltaic performance data collected by NREL for systems throughout the country.
NREL's PVWatts® API estimates the energy production of grid-connected photovoltaic (PV) energy systems based on a few simple inputs.
Returns various types of solar data for US locations. The service currently returns data for average Direct Normal Irradiance, average Global Horizontal Irradiance, and average Tilt at Latitude.