Advances in solar energy technology, combined with government incentives and economic benefits, have led to the widespread adoption of this energy source. Consumers are increasingly seeking to reduce their electricity bills through credit compensation systems and are attracted to projects that implement oversizing of photovoltaic modules to maximize energy generation. However, this strategy can result in a phenomenon known as clipping, a limitation in the output power of the inverter that becomes more pronounced during periods of high solar radiation. This study investigates the impact of photovoltaic module oversizing in grid-connected systems, analyzing the ideal oversizing factor for the city of Cuiabá-MT, where high temperatures prevail year-round. The research combines mathematical modeling and simulations using specialized software to evaluate the behavior of inverters and photovoltaic modules. The results show a decrease in productivity when the inverter load factor exceeds 1.46, offering valuable insights for consumers and industry professionals aiming to optimize the performance and cost-effectiveness of solar energy systems.