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Sagar Island which is located in the world's largest delta, the Sunderban, in the eastern coast of India faces severe power crunch. Due to its isolated location, the power infrastructure is underdeveloped. This has led to very unreliable power supply and frequent power cuts. The island being economically weak, power is inaccessible to most of its residents. Thus, the per unit energy consumption of the area is low and it has led to the lowering of the human development index of the area. However, Sagar Island, owing to its location, has huge solar and wind power potential. This paper discusses the prospect of developing a solar-wind hybrid power plant to supply power to the area. The developed hybrid renewable energy system (HRES) power plant will provide uninterrupted power to the island. Results show that the levelized cost of electricity (LCOE) from the proposed power plant is 0.03707 $/kWh, which is lower than the LCOE from the available grid. Lowering the cost of electricity will make electricity accessible to most of the inhabitants of the island. This will, in turn, increase the per unit energy consumption and hence the human development index. The proposed power plant will also help the environment by reducing CO2 emissions by 1894.08 tonnes annually. It will also save 587.39 tonnes of coal in its lifetime. Hence, the HRES power plant will make power accessible and also help Sagar Island to become a renewable fed "Green Island.". [ABSTRACT FROM AUTHOR]