A Case Study of Green Energy Roofs in Taiwan Using Financial Analyses


  • Meng-Yi Liu Takming University of Science and Technology
  • Dan Lin Takming University of Science and Technology




Green Energy Roofs, Investment Decisions, Solar Photovoltaic System


As part of the low-carbon policy and development in Taiwan, the Bureau of Energy introduced the “Green Energy Roofs Project” in 2017, which encouraged homeowners to install green energy roofs. However, the incentives of homeowners and solar photovoltaic operators to participate in this Project were low. The aim of this study is to propose and evaluate alternative models for investing green energy roofs. The contributions of this study are that, first, we consider factors such as risk management schemes and crowdfunding that have not been considered in evaluating green energy roofs project. In addition, this study provides a solution to Taiwan government’s current dilemma about how to encourage homeowners to install green energy roofs. This study adopts five common investment appraisal methods (including payback period, discounted payback period, net present value, internal rate of return and profitability index) to evaluate four different models for investing green energy roofs. The results show that when homeowners are fully responsible for installation costs of green energy roofs with partial funds borrowed from banks and with consideration of risk management, the homeowners have better investment returns. Therefore, the Taiwan government could consider the alternative strategy proposed in this study for promoting green energy roofs so that the country can x`move a bigger step forward towards the goal of being nuclear-free.


Bureau of Energy. (2019, December 24). Directions for Implementation of Green Energy Roofs Project by Ministry of Economic Affairs. https://www.moeaboe.gov.tw/ECW/english/content/Content.aspx?menu_id=8715

Chang, C. (2020, February 27). Taiwan to boost renewable energy to 20% by 2025, introduce trillion-dollar investment. Taiwan News. https://www.taiwannews.com.tw/en/news/3880997

Chen, H., & Liu, G. (2014). Investment analysis of photoelectric electricity generation system on roofs. Journal of TUNGFANG Design Institute, 35, 1-10. https://10.29421/JTDU.201412_(35).0001

Executive Yuan. (2019, January 2). Green Energy Roofs project. https://english.ey.gov.tw/News3/9E5540D592A5FECD/e1dce6dc-26b6-4299-9ad2-fab723664d8e

Feng, H., & Hewage, K. N. (2018). Economic Benefits and Costs of Green Roofs. In G. Perez & K. Perini (Eds.), Nature Based Strategies for Urban and Building Sustainability (pp. 307-318). Elsevier: Oxford/Cambridge, UK. https://doi.org/10.1016/B978-0-12-812150-4.00028-8

Liang, C. (2017). Low electricity price is detrimental to sustainable development of a country. Economic Outlook Bimonthly, 172, 10-16.

Liao, G. (2017, December 21). Taiwan's Green Energy Roofs project urges the public to build a green home. Taiwan News. https://www.taiwannews.com.tw/en/news/3325380

Mahdiyar, A., Tabatabaee, S., Yahya, K., & Mohandes, S. R. (2020). A probabilistic financial feasibility study on green roof installation from the private and social perspectives. Urban Forestry & Urban Greening, 58(1). https://doi.org/10.1016/j.ufug.2020.126893

Shin, E., & Kim, H. (2019). Benefit-Cost Analysis of Green Roof Initiative Projects: The Case of Jung-gu, Seoul. Sustainability, 11(12), 3319. https://doi.org/10.3390/su11123319

Wu, T., & Smith, R. E. (2011). Economic benefits for green roofs: A case study of the Skaggs Pharmacy Building, University of Utah. International Journal of Design & Nature and Ecodynamics, 6(2), 122-138. https://10.2495/DNE-V6-N2-122-138




How to Cite

Liu, M.-Y., & Lin, D. (2021). A Case Study of Green Energy Roofs in Taiwan Using Financial Analyses. International Journal of Finance & Banking Studies (2147-4486), 10(3), 12–20. https://doi.org/10.20525/ijfbs.v10i3.1288