Energy industry has been transformed from the existing thermal and nuclear power into the green energy such as solar and wind power. In addition, many efforts have been made for efficient production and consumption of energy. This is the energy trend, and this energy storage market leaders Dowell using LG Lithium-ion battery to offer the iCube10/20/40 fully integrated energy storage system. Spanning from the size of kWh to MWh, Dowell’s ESS technology is able to meet various needs of the users and provides customized solutions for the various purposes of the electric power market. Our ESS provides not only economy but also strong reliability through its long-lasting life, safety and excellent performance.