Beyond Self-Consumption: Unlocking Battery Storage Value in Energy Communities via Ancillary Services

Institute of Energy Engineering, Universitat Politècnica de València, Camino de Vera, s/n 46022 Valencia, Spain

Abstract

This research investigates the economic and operational advantages of combining Renewable Energy Communities (RECs) with shared Battery Energy Storage Systems (BESS) to participate in Ancillary Service Markets (ASMs). The investigation seeks to assess whether ASMs can boost the profitability of BESS investments in RECs, explicitly addressing the constraints of BESS when utilized exclusively for self-consumption. Through detailed financial assessment, the research demonstrates that while BESS investments typically lack profitability for self-consumption purposes alone, their financial feasibility is enhanced considerably with ASM participation. Critical financial indicators, including the Internal Rate of Return (IRR) and Net Present Value (NPV), indicate that ASMs generate supplementary revenue streams, enabling BESS to provide grid support services such as frequency regulation, resulting in notable reductions in electricity costs and improved investment returns. The study emphasizes the significance of accounting for the BESS’s yearly cycle threshold, directly affecting its durability and capacity for ASM participation. These results indicate that supportive policies and regulatory structures are necessary to foster REC engagement in ASMs, unlocking substantial economic advantages and improving the financial appeal of renewable energy initiatives. The knowledge gained from this investigation benefits policymakers, grid operators, and investors, as it illustrates the vital function of ASMs in advancing wider adoption and integration of distributed energy resources, ultimately contributing to more robust and adaptable energy infrastructures.