Design of solar water pumping system in urban residential building: (Case study: Yogyakarta, Indonesia)

In residential building sector, the provision of clean water is the one of primary need. The water pump used to do that matter. The technology for renewable energy source, i.e. Solar Water Pumping System (SWPS) will help the society in this sector to decrease the electricity consumption for providing clean water. The SWPS converts the solar energy into electricity. Then, the electricity used to activate the water pump[1][2]. This article discussed about the SWPS design used to residential areas in the urban life of Yogyakarta and the surroundings. Method for designing this system is taken to consider water needs and the potential of solar energy in the area. The consideration factor is building topology, like shading effect and the orientation of roof. With these terms, the system can operate optimally, has high reliability, and suitable to be applied on site. This technology is expected to be able to reduce one of the most high electricity usage in the residential sector, i.e water pumping. The design results that the SWPS uses 600 Wp of the total amount of PV power, 1.2 kW of the Solar Charge Controller (SCC), and 225 W of the inverter. The water pump has the maximum of 150 W on the total head is 9 meters. The whole components of the system is appropriate technology.