The simulation procedure can be divided into 3 different parts. The irradiance simulation defines the calculation method for front and rear side of the PV module and uses either VF, RT or both. The albedo simulation can be conducted using a simplified variable Albedo model or a Spectral Albedo model approach. The user can also define a constant albedo value or implement albedo measurements into the simulation. Finally, the electrical simulation calculates energy yield and bifacial gain of the PV plant using either a simplified One Diode model or a One Diode model specifically tailored to bifacial PV.