Central Java is the third most populated province in Indonesia. With the population of more than 33,7 million people the Province has a quite large demand for electricity. Central Java contributed 16,19% from a total of 61.167.980 PLN's customers throughout Indonesia, with electrification ratio reaching to 91,25%. According to PT. PLN (Persero), electrical energy capacity sold in the Province by 2015 reached 20.408,19GWh or 10,6% of total capacity produced. Central Java's economic growth in 2015 has grown to 5,4% from 5,3% in 2014. This condition should be anticipated as early as possible so that electrical energy can be available in sufficient quantities. One among available solutions is by utilizing renewable energy as a source of power generation. Using LEAP application to process data from Badan Pusat Statistik (BPS), PLN, Badan Perencanaan Pembangunan Nasional and Dinas Energi dan Sumber Daya Mineral, it results in a forecasted total electricity demand of 28.152,05GWh in 2025 and the forecasted total capacity of new renewable energy will reach 2.756,63MW by that year.