CO2 restriction and saving environment activity are rapidly growing globally. New renewable energy demand is increasing dramatically now days. For this rapidly changed energy market, ETR started PV ESS (Photovoltaic Energy Storage System) solution business. World’s best suppliers provide the parts of ESS system to ETR, and ETR produce own solution to global customers. Even though we do not develop each part of the system, ETR is targeting to be a specialized company which does marketing and pioneer new market of energy marget.