The technical assistance aims to support the development of a Tonga Energy Efficiency Master Plan (TEEMP) with achievable energy efficiency (EE) and greenhouse (GHG) targets to ensure the transition to an energy efficient future for Tonga. Tonga has determined that EE policies and strategies are the cheapest and most reliable initiatives for saving energy and reducing costs and GHG emissions. Hence, the Energy Department of Tonga is seeking assistance to develop the TEEMP with achievable EE and GHG targets to ensure the transition to an energy efficient future.