The methods used were economics analysis and evaluation study which involve three analyses, i.e. (i) economic
analysis based on scenarios, (ii) economic risk analysis, and (iii) economic sensitivity analysis. Economic analysis
describes of the cash flow return of investment during the utilization of wind turbine. All calculations are based on
various assumptions in the future such as production energy annual of wind turbine, price energy, the bank rate level
which cannot be accurately calculated in this time. The data about values and assumptions are given in Table 1.