The indicators of economic improvement in energy efficiency have been measured and evaluated globally, one of them was the consumption of energy. However, in Indonesia, the increase in energy efficiency has not been optimally improved in terms of energy consumption, especially for fossil fuel energy consumption and GHG emission. This was caused by the energy resources which was heavily relied on coal-fired power generation and imported crude oil. This paper proposed a solution by providing a good energy efficiency measurement based on the well-developed DEA technique. This study was aimed to provide acceptable energy efficiency, especially any single rupiah of the GRDP produced the people had to consume energy in Indonesia. Thus, optimizing energy efficiency was a key to reduce import dependency, support the green economy, and bring down costs for consumers. This research used input-oriented DEA based on the Charnes, Cooper, and Rhodes (CCR) model to assess the efficiency scores of PLN in Indonesia implemented in the period 2017. The result revealed that the consumption of energy that any single rupiah of GRDP produced, the provinces at Jawa, Bali, Sumatra, Papua, Maluku, and Nusa Tenggara had to consume energy more than one at Kalimantan and Sulawesi. Based on this study, fossil fuel energy consumption and GHG emissions performance in PLN were very crucial for the future of energy assessment in Indonesia.