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In the world, one out of every four inhabitants lacks access to electricity, of which 80% reside in rural areas. This highlights that access to electricity has gained concern as it falls within the Sustainable Development Goals. Therefore, the aim of this research was to develop Inti Kawsay, a low-cost prototype of a 12-volt battery charger using solar panels. The electronic design was simulated in Multisim version 14.0 software for subsequent implementation and testing during solar irradiation. It was found that within a period of 2.5 hours, it was able to charge a 3.8-volt battery to 12.1 volts. In conclusion, a photovoltaic system for charging 12-volt batteries provides a sustainable and cost-effective solution for electrifying rural areas, offering economic, social, and environmental benefits to achieve the use and access to affordable and non-polluting energy.