RenOnBill has chosen four focus countries - Germany, Italy, Lithuania and Spain – in order to capture to an extent the differences that can be encountered when replicating on-bill across wider Europe. The success of the project will allow to take a huge step forward in reaching the European Union energy and CO2 targets and will have an important impact on the economic system, offering a win-win perspective for different actors: companies from the construction sector, energy services, utilities, investors, and ultimately for the society as a whole.