In 2006, Medco Power Indonesia in consortium with Itochu Corporation & Ormat Technologies Inc was awarded to develop the 330 MW Sarulla geothermal Power project by PLN. In 2007 Kyusu Electric Power Co Inc. join as a partner. Three years later, Medco Power Indonesia has received approval from the governor of North Sumatra on the revised AMDAL document, as one of requirement of the project development. Also in the same year, due to tariff filled since 2005 with the crisis that hit the world, which making the existing tariff is not visible, the consortium proposed a changes proposal or tariffs renegotiation and bank ability clause. Kyushu Electric approved by Government as the member of consortium. In 2010 at WGC (World Geothermal Congress) Bali, Government ratified the WGC Tariff between PLN and Consortium as USD 6,79 cent/kWh but the clause negotiation bank ability still discussable until today.
The preparation for the development stage of project design and engineering at Silangkitan, North Sumatera has started in 2012. A year later, Medco Power Indonesia and its consortioum, Itochu, Kyushu, and Ormat through each of its subsidiaries have signed Energy Sales Contracts and Joint Operation Contract for 30 years with PT PLN Persero and PT Pertamina Geothermal Energy. In 2014, Medco Power Indonesia inked US$ 1.17 Billion loan for the development of Sarulla Geothermal Project.
The Sarulla Geothermal Power Plant will be developed in three phases. The Commercial Operation Date (COD) has been running in the first quarter of 2017. While the remaining two units, each of 110 MW capacities, scheduled to operate in fourth quarter of 2017 and 2018. Sarulla Geothermal Power Plant is expected to meet the need of electricity in North Sumatera and also to achieve fuel saving with renewable energy utilization.