i wand to simulate a double pane window using energyplus, where outer pane is a STPV module. when i will use stpv as a glazing element then i have to put data in the WindowMaterial:Glazing objects for STPV glazing. but the spectral data is nither available in EnergyPlus Reference Data Set for WindowMaterial:Glazing that contains spectral average properties for many different types of glass nor in IGBD database. i came to know reading few paper that measuring optical characteristics , thermal conductivity and infrared thermal emissivity of the STPV it is possible to generate .idf file using optics and window software. i have all the facilities to measure optical characteristics , thermal conductivity and infrared thermal emissivity of the STPV. but iI am not sure about the STPV laminate sample dimension as well as the type of sample. Is it require a complete STPV module sample or sample of different layer of STPV module like glass, EVA, PV cell etc. can anybody explain the detail procedure step by step? thanks in advance for your kind help.