Analysis of Electric Energy Self-Consumption Maximisation for Two Different Grid-Connected BIPV Systems

28th European Photovoltaic Solar Energy Conference and Exhibition; 4758-4761
The majority of photovoltaic (PV) systems installed in Europe is connected to the grid. Next to technical issues, such as grid saturation or dimensioning effects, a decrease of feed-in tariffs puts the concept of feeding and drawing electric energy into/from the grid into question. The storage of produced electric energy and its subsequent usage onsite could - under certain circumstances - become a feasible solution for both existing and future installations. In some countries, feed-in tariffs already award self-consumption and dedicated incentives are at the moment under discussion. The aim of this study is to find out and understand the conditions thereof, based on the monitoring data of two different building-integrated PV (BIPV) plants: one roof-integrated (Milland Church in Brixen-Bressanone, Italy) and one façade-integrated system (Ex-Poste building in Bozen-Bolzano, Italy). The balancing of electric energy production and consumption of the buildings is presented on a monthly and hourly basis respectively, including selfconsumption rate and load duration curves. Different scenarios for the maximization of the self-consumption of PV generated electric energy are analyzed.