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An economy with net-zero greenhouse gas emissions is the new EU 2050 is a main long– term strategic objective, which follows the EU RES promotion policy. Investment in renewable energy is a key factor for reduction of the conventional energy sources’ carbon footprint. The transition from conventional to green energy is an on-going process. The renewable energy becomes an integral part from the energy mix of EU countries, including Bulgaria. Current research on RES component of Bulgarian energy mix covers the period from 2007 to 2019. It reveals the internal renewable energy subsector structure. The preconditions for solar and wind energy project are analysed, together with the levels of RES energy production in Bulgaria. The Bulgaria RES sector incoherence is highlighted. Some trends of RES development in the context of gross final energy production and consumption are revealed. Some gaps in Bulgarian practices regarding RES promotion policy implementation are identified and discussed.