Abstract
Solar energy can be converted to electrical energy directly using photovoltaic (PV) modules. The output of electrical energy from the PV module is affected by the intensity of solar radiation and temperature. This study aims to monitor the output power of a solar power plant against changes in solar irradiation and temperature based on the Internet of Things (IoT). Off-grid solar power plants consist of PV modules, solar charge controllers, and batteries. The variables measured are output power, irradiation, module temperature, environment temperature, battery charge and discharge current, and voltage of system. All measurement results are sent via the internet to the ThingSpeak web server to be stored and displayed on a computer or android device connected to the internet. This monitoring system can monitor the real-time conditions of off-grid solar power plants. Monitoring results on 25 October 2022 showed the highest energy was 128 Watt hours with an efficiency of 16.06%.
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