Ports as an industry account for 3% of global greenhouse gas emissions. Sustainable initiatives and zero net energy goals are driving the use of renewable energy sources, such as solar photovoltaic, wind, and other systems. The main objective of this article is to discuss ways to reduce greenhouse gas emissions inside the port by integrating renewable energy technologies in an efficient manner using micro grids. Clean energy-based, direct current (DC) microgrids are considered as a revolutionary power solution. In several development sectors, they are becoming increasingly attractive to researchers since they generate less greenhouse gases (GHGs), lower operating costs, and offer flexibility. This article highlights and details the benefits of implementing renewable-based DC microgrids with suitable energy storage technologies to achieve sustainable port energy management. ©, Copyright Association of Energy Engineers (AEE).