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The increasing of electricity needs are the same with high consumption of fossil energy used as fuel for production in Indonesia. As a solution, the new and renewable energy can be a new thing to prevent the problem of dependence on fossil fuels. Through the use of renewable energy, the problem is that renewable energy is very dependent on nature, which can lead to an unstable electricity supply and requiring a small construction site. Therefore, the development of various new renewable energy sources is a way to solve the problems. The use of floating photovoltaic technology can solve the problem of land use planning. This study aims to design a hybrid generator with the addition of floating PV technology, perform an economic analysis and calculate the value of the payback period. The scenario with PV and Wind Turbine composition with an NPC value of Rp, 32,372,170,000, COE value of Rp,1,224 / kWh and payback period of 18 years and 6 months. [ABSTRACT FROM AUTHOR]

The rapid growth of renewable energy sources and the demise of fossil fuels are causing rapid growth of battery application. The lifespan of battery is expected to be long and it is affected by battery charging and discharging. When charging battery, the charger must consider battery type, voltage and temperature. Smart programmable power supply is implemented as battery charger which has flexibility to adjust different parameter such as battery type, nominal voltage, current limit and temperature limit. The smart power supply is reconfigurable by virtual instrument software in personal computer (PC). The smart power supply has voltage range 1.4 to 22 V with 0.1 V resolution and maximum current 2 A with 0.1 A resolution. [ABSTRACT FROM AUTHOR]