ABSTRACT
The solar cells experience solar irradiance fluctuation patterns which are time dependent. The performance of the photovoltaic (pv) system at any given instant or during any time interval is dependent on the state of charge (soc) of the storage media, and on the electrical energy flow from the modules during that time interval. The correct statistical distribution of all the hourly irradiance values incident on the aperture of the pv module over the specified time scale should be reflected in the irradiance curve constructed to represent the typical meteorological day. The waste is the electrical energy converted from solar energy which is not used either by the load or by the battery. The prediction of long-term performance of solar energy systems may be attempted using the tmd method. The conversion efficiency is computed from the simulation results obtained from both methods: the typical meteorological day (tmd) and actual irradiance methods.
