Dear Nanta Ragavander,
Thank you for your inquiry.
For EnEV, the yield of the PV system must be calculated according to DIN EN 15316-4-6 with irradiation values from DIN V 18599-10. This is a very simplified calculation method. The irradiation at the module level is taken into account, which is specified by DIN V 18599-10 for various regions. Only the angles 0°, 30°, 45°, 60° and 90° are available as tilt angles. The climate data set actually selected during planning, with its more realistic irradiation values, is irrelevant. The peak power of the PV system and a system power factor are also taken into account. The system power factor is also specified by DIN. The actual module and inverter parameters are irrelevant.
The ENEV calculation has nothing to do with the actual PV*SOL yield simulation. PV*SOL carries out a dynamic simulation process that is based on the actual module and inverter parameters, etc. The specific efficiencies of the modules and inverters, temperature dependencies etc. are taken into account in the simulation. In addition, the specific, selected climate data set for irradiation is used. The simulation contains not just a formula, but a complex model with many parameters. Accordingly, the results of the EnEV calculation may deviate to a greater or lesser extent from the actual simulation.