Е-Публикации
Технически университет - София

Abstract: This paper presents a comparative evaluation of two orientation strategies for photovoltaic (PV) modules installed on the same roof surface: a standard mounting type and an active east-west orientation. The objective of the study is to evaluate the energy yield, the performance factor, and the financial return over one year. The simulation results show that the east-west orientation significantly outperforms the fixed mounting configuration in terms of energy output, especially during the winter and summer months. The performance indicators and cumulative savings indicate a shorter payback period and higher efficiency in the east-west case. This demonstrates the advantages of active or optimized orientation strategies for rooftop photovoltaic systems. These findings support the implementation of dynamic orientation designs as a cost-effective solution for maximizing solar energy utilization in urban environments.

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