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Due to the high cost and impracticality of grid extensions in rural Sarawak, villages such as Kampung Sungai Merah rely on unsustainable and expensive diesel generators for electricity. This study focuses on the sizing of a sustainable off-grid photovoltaic (OGPV) system tailored to the village's specific energy needs. By analyzing household energy consumption and optimizing key system components like batteries and solar panels, the project ensures maximum energy utilization while balancing cost and efficiency. A comparative analysis of solar panel power ratings determined that 550W monocrystalline panels provide the best value for performance and cost-effectiveness. The results highlight the potential of OGPV systems to provide reliable, scalable, and environmentally friendly energy solutions, improving quality of life and addressing rural electrification challenges.