The Climate Change Team at the Lebanese Ministry of Environment, with the support of the United Nations Development Programme, has produced a series of climate change studies which delve into the specifics of climate change mitigation options for the energy and transport sectors in Lebanon. The seventh dissemination, titled “Optimal Renewable Energy Mix of the Power Sector by 2020; the Government of Lebanon committed to reach 12% renewable energy in its energy mix by 2020. In order to determine the optimal energy mix considering the cost burden to the government, this study incorporates the capacity potential of three renewable technologies with the assumption of meeting the estimated/expected 29,784 GWh demand by 2020 in a number of scenarios, and showcases the importance of renewable energy and its economic impact on Lebanon.