This independent study To study the technology to install a solar power system on the roof farm. In the district of Pongyangkhok. District Lampang Province to independent power producers. And study the possibility of financial investment in installing a solar power system with a 76.80 kW including environmental analysis of the project. In this study, data collection, the solar radiation. And ask the operator And investment decisions are based. Net present value, internal rate of return on costs, return on investment. Payback period of
the study period. Electricity with solar cells on the roof farm capacity of 76.80 kW of electricity in the last 25 years (2557-2577 BC), using solar cells with a capacity of 300 watts. 256 panel with power converter 13 each machine has a capacity to produce 3,000 watts, the results of the financial discount rate of 8% found this rewarding investment. The net present value is equal to 616,421.10 baht, the rate of return on the cost of the project is 9.37% per year, the rate of return on investment is equal to 1.04 and a payback period of 20 years, 10 months, all the while staying at. Acceptable Threshold But because the cost of investment in infrastructure and the high costs. The present value of the project is lower than income from operations swine each month. The project is unlikely to generate electricity with solar investment when compared with the benefits they receive.
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