Display Name: Annual Average Solar Direct Normal Irradiance
Description: Direct normal solar irradiance in kWh/m2/year.<br><br>Sengupta, M., Y. Xie, A. Lopez, A. Habte, G. Maclaurin, and J. Shelby. 2018. "The National Solar Radiation Data Base (NSRDB)." Renewable and Sustainable Energy Reviews 89 (June): 51-60.<br><br>(NREL)