This book explains and illustrates how Indonesia as the largest and most populous country in Southeast Asia can become independent of fossil fuels by both reducing its energy needs and using renewable resources. A study presented in this work focuses on the Maluku Archipelago in eastern Indonesia with Ambon as its capital. Conventional energy is brought to the islands over long distances by partly simple means as boats, ships and aircrafts. This unsustainable situation calls for a decentralized renewable energy supply strategy.