Since 2012, when Resolution No. 482 of ANEEL (National Agency for Electric Energy) created the Electric Energy Compensation System, it was possible for Brazilian consumers to generate their own electricity from renewable sources or qualified cogeneration, supply the surplus to the distribution network of your locality. This milestone motivated the industry to develop technology in the area of photovoltaic energy. In light of this new perspective, the objective of this article is to compare the generation of electric energy by Grid-Connected Photovoltaic Power System 3.1 kWp installed in the rural area of the State of Rond??nia located in the Amazon region, where the climatic seasons are rain and dry, with the generation estimate of the PVSyst program. The results of this analysis suggest that the industry develop projects and research to improve the program when it involves grid-connected photovoltaic (PV) power system in the northern region.