Protergia is Metlen Energy & Metals Electricity and Natural Gas provider, the largest private energy company in Greece, and is active in the supply of electricity and gas by offering modern and reliable services. Protergia offers combined electricity and gas products and serves more than 500.000 electricity supply account numbers throughout the country. The sophisticated way Protergia offers its products, the innovation in its services and the green design focus with friendly service, paves a new way to energy for thousands of households and businesses.