Real-Life Load Profiles of PV Battery Systems from Field Measurements

The definition of universal load profiles for Photovoltaic (PV) battery systems is an important factor in understanding and optimizing system efficiency, sizing and operating strategies. This publication gives detailed information on the load distribution of 16 households featuring PV battery systems in Germany that were measured in the course of a scientific monitoring program since mid-2015. Statements on the frequencies of high- or partial-load range of the different electronic components (for both, AC- and DC-coupled systems) as well as the batteries are given. Using the given data, a method to develop a generally accepted definition of an averaged operating efficiency for those systems is proposed.