The EV battery is an essential part of electric vehicles quickly exchanged at the swap station. Studies have shown that non-linear loads on swap stations generate high THD and affect the power factor (PF). Currently, Individual Harmonic Distortion (THD) limit based on the IEEE 519-2014 standard is 15% on 3rd to 11th orders and 7% on 11th to 17th orders. The power quality (PQ) in the system reduces when the PF value is unsuitable with the standards set by State Electricity Company (PLN), namely <0.85. A decrease in PQ causes interference or damage to electronic equipment. Therefore, this research analyzes PQ improvement using Capacitor bank and Single Tuned Passive Filter (STPF). The PQ measurement was carried out on the swap station, then the modeling and simulation process using MATLAB Simulink Software. The simulation result showed that the PF value increased from 0.715 to 0.97. Therefore, the value of Individual Harmonics on the 3rd, 5th, 7th and 11th orders decreased from 46.9% to 3.92%, 40.86% to 1.57%, 19.15% to 1.75% and 7.92% to 5.49%, respectively. This means that both values met the IEEE 519-2014 standard.