The installation of 11.04 kWp solar photovoltaic power plant is tentatively comprised of the following; Forty-eight units of photovoltaic modules, multi-crystalline solar modules were used in this project with its efficiency of 14.0%. Three units of inverter, each of which has its nominal output 3.5 kW and its efficiency of 95%. This project is located at Bangkok area with its solar irradiation of 4.84 kWh/m2.day. Energy generated by this project is 14.7 MWh/annual. The total capital cost of project is $48,387 with its annual O&M of 1% of the capital cost. The RETscreen calculated the return of investment to equity IRR of 11% with the proposed feed-in tariff at $0.48/kWh as presented in Table 3, 6 and 7.