## 5 Conclusions  
This study assessed the environmental and economic impacts of renovating a public kindergarten in Austria as part of the AURORAL project, with a focus on integrating PV systems and evaluating the outcomes of such investments under different socioeconomic conditions affecting the building's energy profile. Using LCA and LCC methodologies, this analysis highlighted the potential benefits of renewable energy systems in reducing the building's GWP and examined operational costs under varying usage conditions and installation sizes. By analyzing both a low-usage scenario (2021, during COVID-19) and a high-usage scenario (2024, post-pandemic), this study provides insights into how pandemic-related disruptions have the potential to affect the utilization and financial outcomes of energy sustainability measures, highlighting the need for comprehensive scenario-based analysis methodologies for the maximization of sustainability investment outcomes. During the low-usage period, the PV system met energy needs despite reduced operational demand, resulting in the lowest LCOE. However, the economic benefits were limited, as the lower energy demand reduced the revenue generated from surplus energy sold back to the grid. Under high-usage conditions, the renovation demonstrated more significant energy savings, emission reductions, and improved payback periods, emphasizing its potential for long-term economic and environmental benefits. The findings also highlighted the importance of appropriately sizing PV systems; depending on the pricing scheme and export rates, larger systems might not yield optimal economic returns over their lifetime. Furthermore, the results underscore the influence of favorable energy policies in enhancing the financial viability of PV installations and minimizing lifecycle costs, providing critical incentives for investments in RES systems. This research contributes to the broader field of sustainable building practices by validating the importance of adaptive analysis frameworks that account for varying operational conditions and evolving energy policies. These findings are particularly relevant for municipalities and policymakers, as public buildings, such as educational facilities, represent significant energy expenditures [66; 67; 68]. Expanding the use of tools like VERIFY across similar projects in the public sector could accelerate the transition toward energy-efficient infrastructure, delivering cost savings and supporting climate action goals. Future research will build upon these findings by incorporating real-time energy data to enhance the accuracy of energy demand forecasts and PV system performance evaluations. Additionally, exploring the integration of energy storage solutions could help optimize self-consumption and reduce grid dependence, further improving economic feasibility. Analyzing the role of emerging energy technologies, such as battery storage and smart grid systems, could provide valuable insights into long-term energy sustainability investments. Furthermore, conducting an economic sensitivity analysis, assessing the impact of fluctuating energy prices, inflation rates, and subsidy changes, could enhance the understanding of financial risks and investment resilience in renewable energy projects. Such evaluations would help policymakers and stakeholders develop robust financial strategies for large-scale energy-efficient building renovations under dynamic economic conditions. The conclusions drawn from this study provide a robust foundation for advancing sustainability initiatives, ensuring that public buildings align with climate goals and financial efficiency benchmarks while contributing to broader sustainable city strategies and the development of sustainable, resilient infrastructure.