Economic evaluation, optimization and comparison of photovoltaic-battery-grid power supply system in single- and multi-family buildings with increasing share of renewable energy

This paper deals with the investigation and economic evaluation of photovoltaic-battery-grid power supply system in residential and non-residential buildings with different shares of renewable energy in different years, different regulatory boundary conditions and cost degression estimations. A linear programming approach is selected for the determination of technical and economical capabilities of this energy system. By investigating and simulating different electricity supply system configurations electricity tariffs have been forecasted. Previous studies have shown that the use of photovoltaic-battery systems in buildings are only economic feasible with variable electricity tariffs and feed-in tariffs. The cost effectiveness of photovoltaic-battery systems strongly depends on both the cost of storage systems and political decisions.