Electricity, as one of the final energy forms, plays a very important role in supporting various economic activities to increase people''s welfare. Most developing countries urgently need electricity for their economic development; on the other hand, economic prosperity brings a strong growth of electricity demand. Indonesia, as one of the developing countries, needs to expand its electricity generation in order to fulfill electricity demand in the future as well as to support economic development. The electricity expansion needs to consider clean and abundant energy sources to achieve affordable energy prices, system reliability, and environmental impact. Furthermore, the effort to conduct energy efficiency and promote energy saving behavior by the Indonesian people is one of several ways to support energy security improvement.