DESIGN AND IMPLEMENTATION OF SOLAR PANEL SUBSYSTEM, BATTERY SUBSYSTEM, INTERFACE SUBSYSTEM, AND CONTROLLER SUBSYSTEM IN OFF-GRID SOLAR PANEL SYSTEMS WITH LAPTOP AS A LOAD

• Main Author: Muhammad, Rafid
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/69570
• Institution: Institut Teknologi Bandung

In Indonesia, there are still areas that do not have access to electricity. This can be seen from the value of the electrification ratio in Indonesia which has not yet reached 100%, for example in East Nusa Tenggara Province, the electrification ratio is only 85.84% and shows that 14.16% of households in the province have not used electricity. On the other hand, electricity is needed in everyday life, for example in terms of education, especially during this pandemic where learning is done online. Electricity can be generated by converting other energy into electricity, for example energy from wind, coal, and so on. One of the renewable energies that can be converted into electricity is sunlight, for example by using solar panels. This energy source is suitable for use as electricity considering that Indonesia has a tropical climate with an intensity of irradiation of around 4-6 kWh/m2 and a irradiation time of 40% to 80%. Based on the description above, a solution is proposed in the form of an Off-Grid solar system with a laptop as a load. Some of the important parts of the system are solar panel subsystem, battery subsystem, interface subsystem, and controller subsystem. The solar panel subsystem consists of monocrystalline solar panels and solar panel interfaces, the battery subsystem consists of LiFePo4 batteries and current and voltage sensors, the interface subsystem consists of 10 LEDs that display battery capacity with a resolution of 10%, and the controller subsystem contains the MPPT algorithm (Maximum Power Point Tracking) and system software integration. In general, functional testing for each subsystem has been successfully carried out.