An explanatory diagram for a project of up to 100s watts with a monitoring and control system to achieve the optimal work between the solar and batteries. Mini-grids are an ideal solution for low- and medium-density areas, providing electricity to rural communities and businesses more economically than extending a centralized grid. These systems are particularly valuable in connecting millions of people worldwide who currently lack access to electricity. A mini-grid designed for up to 100 watts uses a monitoring and control system to optimize the interaction between solar panels and batteries, ensuring efficient energy use. The explanatory diagram shows how the system balances solar power and battery storage, maximizing reliability and minimizing costs. Although mini-grids have a higher upfront cost compared to on-grid and hybrid systems, the return on investment is generally achieved within 5-6 years. With a 20-year guarantee on the system’s efficiency, this investment is both reliable and long-lasting. These systems are particularly beneficial in areas where grid extension is impractical, offering a sustainable solution for energy independence and economic growth.