Solar
Access data and analysis services that provide access to solar resource data and NREL models.
NSRDB Data Downloads
Freely available downloads of The National Solar Radiation Database.
PVDAQ (PV Data Acquisition)
Provides access to photovoltaic performance data collected by NREL for systems throughout the country.
PVWatts
NREL's PVWatts® API estimates the energy production of grid-connected photovoltaic (PV) energy systems based on a few simple inputs.
Solar Dataset Query
Returns information about data available for a given location for the solar resource database used by the PVWatts® Calculator and PVWatts APIs.
Solar Resource Data (GET /api/solar/solar_resource/v1)
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.