This report provides a comprehensive analysis of solar energy design, focusing on the creation of a solar PV farm/plant (mini-grid) capable of generating 5000 kWh of power annually. The design includes detailed calculations for the number of solar modules (21,000 modules), cable sizing, and the selection of charge controllers and inverters. The report emphasizes the importance of battery storage, specifically using 2100 units of 12V lead-acid batteries to store energy for off-peak usage. It also explores the application of nanotechnology to enhance solar cell efficiency and reduce manufacturing costs, with a focus on gold nanoparticles and nano-structural gratings. Furthermore, the report includes a financial analysis, estimating the costs and potential profits of the system, along with a payback period calculation of approximately 18 years. The report concludes by suggesting strategies to improve the payback period, such as securing higher feed-in tariff rates and adopting hybrid renewable energy systems.