3.1.3 Climate Data

The Rating Software shall perform simulations using hourly values of climate data, such as temperature and humidity, derived from WYEC (Weather Year for Energy Calculation), TMY (Typical Meteorological Year) or CWEC (Canadian Weather for Energy Calculations) climate data.

The Rating Software shall calculate solar radiation on exterior surfaces on an hourly basis from the values of direct normal irradiance and diffuse horizontal irradiance contained in the climate data, taking ground reflectance into account.