Mini Solar Home System for Electricity Supply in Coastal Rural Area, Case Study: Yogyakarta, Indonesia

Access to electricity at the southern coast of the Special Region of Yogyakarta (DIY), located in the Gunung Kidul district, has not been evenly covered. There are still many areas where the public electricity grid has not reached from Perusahaan Listrik Negara (PLN). This could be due to the geographical conditions of the area consisting of mountains and coral hills. However, the coastal area here is a popular tourist area and is quite promising for income for local governments. So, giving access to electricity will make tourism facilities in the area more advanced. This article will discuss the reliable design of a mini solar home system used in civilian buildings in coastal areas, such as; houses, shops, places of worship, or public facilities. The design method used is a quantitative approach, starting with calculating the potential of solar power in location, the electricity requirements for a city building, and the number of solar power systems. The results of the mini solar home system (SHS) design based on quantitative calculations the system operating voltage is 12V with a stand-alone off-grid topology. The power plant uses two solar photo voltaic (PV) panels with a capacity of 100Wp each and a 12V 20A solar charge controller. The solar panel used is monocrystalline. At the same time, the storage section uses 1 unit of 12V 50Ah deep cycle batteries. Then the power conversion section uses a modified sine wave inverter 50 Watt. The design of this system will make a stable supply of electricity for 1 unit of civil buildings with a load of 5 lamps 5 Watt.