National Clean Development Strategy is a strategic document that all the Member States have to carried out, demonstrating how the 2050 GHG net zero emission target can be reached. REKK provided modelling support and leading the development of low-carbon scenarios (policies/technologies options). The modelling support includes the integration of HU-TIMES model to a macro-economic model – GEM - and simulations of alternative scenarios with HU-TIMES models. REKK set-up, analyzed three different scenarios – a business as usual, and two alternative decarbonization scenarios – and quantified the main results of the energy sector modelling, including the additional cost, the mix of the energy consumption in the different subsectors and the GHG emissions.