Aquaculture centers in Yogyakarta located in Sleman District. The main contributors to fish farming in Sleman came from Sendangsari village, Minggir sub district. Fish farming carried out by individuals or groups. By 2010, this area accounts for 77,2% of total fish production in Sleman, Yogyakarta. One of the problems of fish growing in ponds is the dissolved oxygen (DO) concentration in the water. In the fish farming business, the ability to maintain water quality is the key of improving fishery production capacity. The solution to maintaining water quality is the implementation of the aeration with renewable energy source.
Based on the geographical region, fish pond located away from power lines. So, it is necessary to use local potentials of renewable energy such as solar energy. The annual average solar radiation in Indonesia is 4.5 kWh/m2/day with 9% monthly variation. The main objective of the present study is to design the optimum sizing of electric power design to support the electricity demand of fish pond aeration system. Applied methodology provides a simple approach for sizing electricity system using HOMER software (Hybrid Optimization Model for Electric Renewables) to fulfill the requirement of 450 Wh/day primary load with 1.692 Wh/day peak load. The result of the analysis is a list of feasible configuration power system sorted according to the cost of energy (COE). The result show the optimal sizing of photovoltaic 1 kW, 8 battery of 200 Ah and inverter 0,2 kW. This is the most economically feasible and least cost of energy (COE) is about 0,769 $/kWh.
