Hydropower electricity is one of the oldest sources of electricity in the modern world. Started in the end of the nineteenth century, Hydropower is still the most effective cost per power to date. Indonesia’s potential for hydropower generation is immense in which more than 80% is still untapped. With the escalating demand for energy, various companies and government authorities are keen to harness renewable energy from the country’s many rivers. This is particularly true of remote communities for which connecting to the national power grid is prohibitively expensive. The principle of hydropower is to convert the potential energy into mechanical energy and then to electrical energy.