Design of a Solar Inverter System for Off-Grid Solar Power Applications
Keywords:
Solar Inverter, Off-Grid, Solar Energy, Solar Power Plant (PLTS), IoT, Renewable Energy.Abstract
The continuously increasing demand for electrical energy encourages the development of efficient and independent renewable energy solutions. This study aims to design a solar inverter system for off-grid solar power applications that can be used as an alternative electricity source, particularly in areas not yet connected to the national power grid (PLN). The designed system consists of a 100 Wp solar panel, a 12 V 100 Ah battery, a solar charge controller (SCC), and a 500 W inverter, and is equipped with an Internet of Things (IoT)–based monitoring system using NodeMCU and the Node-RED platform. The methods employed include power requirement calculations, system design, assembly, and performance testing of the solar panel, battery charging process, and response to a lighting load. The test results show that the system is capable of producing an average power of 76.26 W, charging the battery within 1.5 to 2 days, and maintaining voltage stability and capacity when subjected to a 16 W load. The IoT monitoring system also functions properly in monitoring voltage, current, temperature, and humidity in real time. It can be concluded that the designed off-grid solar inverter system is able to provide a stable and reliable power supply for light loads and can serve as an applicable and efficient renewable energy solution for small-scale needs in remote areas or public facilities.
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