A high CO2 intensity of the energy sector in the Western Balkans requires a transition to a future low carbon energy supply in this region. By substituting renewable energy for energy supplies based mainly on fossil fuels, the Western Balkan countries can contribute to climate change mitigation in line with the commitments of the Paris Agreement. For this reason, two of the Western Balkan countries, Macedonia and Montenegro, have already incorporated economic emission reduction targets into their national legislation or policies in line with their nationally determined contributions. The six Western Balkan countries (WB6) are part of the Energy Community and have therefore agreed to adopt parts of the EU energy legislation. The aim of the Energy Community is to integrate the EU’s internal energy market with its neighbouring markets, particularly in South-East Europe.