Fitri Isnatul Avinda, Aripriharta, Mohamad Rodhi Faiz, Norzanah Rosmin
In a stand-alone solar power generation system, battery can be functioning as an energy supplier, and also can be used as a backup storage when needed. Due to these functions, it could cause the occurrence of an inrush current. Inrush current is a surge in current that occurs in the range of μs to ms with an amplitude that can reach several times of the normal current. Therefore, this study presents the in-rush condition of a battery in stand-alone PV system by comparing inrush current situations in 12V/14Ah and 12V/7Ah batteries. The analysis has been carried out on different loads in a household, and also in different testing time. In this experiment, 50A/75mV shunt resistor was used as a battery output current sensor. From the experimental study, it has been observed that inrush current may spikes up to 172A in 520 μs when 14Ah battery is connected to the inverter with an inductive load RL. From the comparison study, it has been found that 14Ah battery with internal resistance of 14 milliohms presents higher current spike compared to 7Ah battery with 28 milliohm resistance. By setting a test time lag of 10 minutes, it has been shown that the signals from the battery and inverter devices, were able to return to the normal condition whereby the inrush current can be measured finally at around165A. © 2025 Author(s).
Department of Electrical Engineering, State University of Malang, Malang, Indonesia; Centre of Electrical Energy System (CEES), Institute of Future Energy, Universiti Teknologi Malaysia, Johor, Skudai, 81310, Malaysia; Faculty of Electrical Engineering, Universiti Teknologi Malaysia, Johor, Skudai, 81310, Malaysia
