Abstract This paper presents the results of a survey on two informal settlements in Rio De Janeiro: Reta Velha (Itaborai) and Jardim Bom Retiro (Sao Goncalo). A detailed analysis of energy access and energy poverty level has been accomplished by questionnaires carried out in 400 households. The questionnaire was based on a detailed multi-tier approach. It was aimed at exploring the actual energy access and energy poverty in favelas, in addition to draw the local living conditions and the availability of the basic services. The outcomes of the research underline the problem of outages and low tension, and illegal connections. Furthermore, electricity consumption is very high compared to the service provided, and expenditures are generally disproportioned to the households’ income. Many interesting outcomes emerge from the survey. Referring to energy poverty, it is a status in which 50% of households are in Jardim Bom Retiro and 20% in Reta Velha. Due to the representativeness of the treated case, the results permit the definition of the state of the art and of enhancing guidelines suitable also for other contexts, at least in the universe of informal settlements in Latin America and Caribbean.