C32 -- Towards a Framework for Optimizing Rooftop PV Systems Based on Household Electricity Consumption Data of Multi-apartment Buildings

The paper analyzes electricity consumption data in multi-family buildings in view of potential installation of rooftop solar photovoltaic (PV) systems. The aim of PV systems installation is to achieve one of the targets of the Renewable Energy Directive (RED) - decarbonization of buildings by integrating renewable energy sources (RES) into building energy systems. The purpose of the analysis is to optimize the use of rooftop PV system of an old 9-storey residential building built in Latvia during the period 1980-1991, and to provide a comprehensive understanding of the electrical and engineering aspects of such a system for the possible creation of an energy community. The authors identified the most effective technological configuration and solutions for a PV system to maximize energy efficiency for self-consumption, addressing the building's electricity demand for shared needs. PolySun software was used for conducting the research, all calculations were made using real electricity consumption data of one year. The findings of this study can be extrapolated to rooftop PV systems in multi-apartment buildings situated in comparable climatic conditions.