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Abstract
Solar Charge Controller (SCC) PWM available on the market generally must be installed by connecting the SCC to the battery using the shortest possible power cable. This is intended to reduce the problem of the battery voltage measured at the SCC and the voltage measured at the battery poles having different values when charging the battery. The difference in voltage values can cause errors in indicating the battery voltage in the SCC so that battery charging is not fully optimal, especially when the battery is close to full. The application of separate SCCs to portable PV panels and portable power stations requires the use of long power cables between the SCC and the battery in portable power stations. Therefore, an SCC design is needed that can overcome this problem. In this study, the SCC Full Power Point Tracking (FPPT) design is proposed. One way to accurately indicate the battery voltage in the SCC is to disconnect the DC current from the PV panel to the battery in a very short time accompanied by measuring the battery voltage, this disconnection and measurement are carried out periodically. The results of the voltage measurement are used to determine whether the battery is fully charged or not. The SCC FPPT made here can provide power up to 98.3% even though the battery is detected as almost full by using a 60 cm long cable with a cross-sectional area of 1.5mm2 from the SCC to the battery