 This paper examined the potential of biomass and biogas in Entre Rios province and Concepción de la Uruguay. The authors looked at the availability of biomass from the forestry, agricultural and poultry industries in Entre Rios, as well as the potential of biogas from chicken waste. They also calculated the energy return on investment EROI for renewable energy sources in Argentina using life cycle analysis, LCA. This EROI measure takes into account the costs associated with generating electricity from renewable sources, such as initial investments, maintenance and fuel costs. The results showed that biomass has the highest EROI, followed by biogas and solar photovoltaics. The authors concluded that these findings can help optimize distributed generation in medium voltage, as well as determine the energy profitability of generators. This article was authored by Federico Gabriel Camargo.