Evaluation of Rooftop Solar Photovoltaic Systems from the User's Perspective: A Case Study of Homes in Bangkok and Surrounding Areas
Keywords:
Solar Rooftop Photovoltaic, Urban Residential Buildings, Multi-Criteria Decision Making Analysis, Rank Order Centroid (ROC), Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS)Abstract
Currently, there is increasing interest in alternative energy sources, including the installation of rooftop solar photovoltaic systems in homes. However, the technical information provided from the perspective of manufacturers and installers is often complex, making it difficult for users to understand and make decisions. Additionally, various criteria affect decisions differently based on the physical and geographical characteristics of homes. This research aims to collect and analyze factors related to the evaluation and selection of rooftop solar photovoltaic systems, focusing on factors that directly impact users. The scope of the study is defined for homes in Bangkok and its surrounding areas, analyzing 12 factors that influence decision-making. They were ranked by experts using ROC. The best alternative was selected using TOPSIS. The results revealed that the three most important criteria and weight were: panel wattage (0.2586), cost (0.1753), and lifespan (0.1336). These findings align with general user preferences, prioritizing system efficiency, cost-effectiveness, and durability. The result showed the best is the first type, which is solar PV monocrystalline. The study provides a decision-making framework for users, enabling them to make more confident choices. This can be adapted to evaluating, selecting, and adjusting the weight assigned to each factor based on the specific application.
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