Even if significant efforts are being supported by a great part of Occidental Countries to switch from traditional thermochemical systems, based on fossil fuels to produce electrical and thermal power, to renewable energy sources-based technologies, according the latest international agreements between Countries aiming to mitigate the climate change, right now it is not possible to rely only on RES’s to meet the energy needs of all the people in the word. In this context a combined heat and power (CHP) energy system based not on thermochemical but on more efficient electrochemical processes, could help the energy transition, using as well a fossil fuel as methane, but resulting in a strong reduction of pollutants and greenhouse gases (GHG) emission with respect to traditional fossil fueled energy systems.