Abstract:
The research had the objectives of studying the cost and benefit for solar cell installation on the roof and also analyzing the financial worthiness of the project of a steel and automotive basic metal factory. In this project, the vital key was cost-saving on electrical power usage by installing solar cells of 526.90 kW on grid. The factory roof of 6,132 sq. m. had been used for setting up the solar cell panels. The overall investing cost was 25,415,001.95 baht or 48,234.96 baht per kW. The project life of 25 years was used in financial analysis. Throughout the project period, electricity will be produced for 11,143,973.56 kWh. Cost of product, or CFP, which includes maintenance cost could be 2.28 baht per KWh. The financial analysis of the project indicated that the net present value (NPV) was 8,995,594.35 baht, the internal rate of return (IRR) was 11.68%, and the discount payback period (DPB) was 12.47 years. This project is high worthiness to invest.
Keywords: Cost and benefit, Solar cells on roof, Steel and automotive basic metal factory