This study investigates the relationship between green finance dimensions (ESE), the role of financial sector development, and the sustainable performance of renewable energy projects. Green finance with multiple dimensions (economic, social, and environmental) was adopted in the study. The study used structured questionnaires and the data is collected from different projects working in the southern part of Pakistan on energy generation which consist of 400 sample sizes. The study used structural equation modeling to analyze the theoretical framework of the study. Three different types of tests were performed over primary data. First, descriptive statistics were performed to examine and describe the sample demographic information (Loeb et al., 2017). Second, confirmatory analysis was used to evaluate the survey's psychometric properties, including its validity and reliability. Third, partial least squares equation modeling was used to test the hypothesis of the study. The results of the study indicate that the green finance economic dimension has a positive impact on the sustainable performance of renewable energy projects. Moreover, the results of the study indicate that the green finance social dimension has a positive impact on the sustainable performance of renewable energy projects. Furthermore, the results of the study indicate that the green finance environmental dimension has a positive impact on the sustainable performance of renewable energy projects. Finally, the results of the study confirmed the positive mediating role of financial sector development intervention in the relationship between green finance dimensions and sustainable performance of renewable energy projects. The findings have important insights for various stakeholders i.e. government, regulatory bodies, practitioners, academia and industry.