Reducing Energy Cost in Off-Grid Systems Using Deferrable Loads
Ibnu Kahfi Bachtiar, Nanang Hariyanto, Fathin Saifur Rahman, Suwamo · 2024
Renewable energy is crucial for electrifying remote areas, especially islands. Hybrid renewable energy systems that combine photovoltaic (PV) and battery energy storage systems (BESS) are a promising solution, as they eliminate the need for fossil fuels. However, reducing energy costs remains a significant challenge for these stand-alone hybrid systems. In residential off-grid systems, there are often deferrable loads, those whose operation can be rescheduled or shifted. This study explores how deferrable loads impact energy costs. In simple terms, deferrable loads are seen as a proportion of the total load. By analyzing different proportions of deferrable loads in relation to the total load, simulations are conducted using the HOMER software. The results reveal that by having 40% deferrable loads can reduce energy costs and alleviate capacity shortage by up to 50%.