The objectives of this study were to analyze direct and indirect economic cost-benefit analysis of using solar PV roof tops in housing, and to investigate the financial-economic feasibility and sensitivity analysis of the project. This feasibility analysis was procedure by Net present value (NPV), Benefit-Cost ratio (B/C ratio), Interest rate of return (IRR) and Payback period (PP). The financial results found that NPV was 80,876 baht, B/C ratio was 1.16, IRR was 14.37% and PP was 7 years. Regarding to the economic feasibility analysis, the results indicated the NPV was 380,450 baht, B/C ratio is 1.76, IRR was 22.71% and PP was 4.62 years. The sensitivity analyses were performed by simulating the maximum changes of cost and minimum changes of benefit whereas the internal rate of return (IRR) approach to the discount rate of the project. According to the financial study, the cost could be changed as maximum rate of 116.18 % and the benefit could be changed as minimum rate of 1.01%. Moreover in economic study the cost could be changed as maximum rate of 176.09%. It implied that this project could meet breakeven point and valuable to be invested. Therefore, policymaker should strongly implement measures to support this project to be existed. Key word : Solar PV Roof Tops, Housing, Cost Analysis, Economic, Economic Benefit
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