**4.2 Luxembourg**

Luxembourg is one of the EU countries, which had two positive CBAs, the first in 2013 and the second in 2018. At the first instance, the government chose to start a mandatory rollout with the introduction of gas smart meters and electrical smart meters by 2020 for at least 95% coverage. Now, the end of the massive rollout is expected by the end of 2021, reaching 90% of the total. The smart metering rollout started in 2015, and it included the development of an energy grid for the integration not just of electricity and natural gas consumptions but also distributed energy resources such as solar, wind, biogas, and heat pumps [7].
