Community Batteries: Technology Overview and Multi-Market Techno-Economic Assessment

Community Batteries (CBs) are emerging as critical assets for energy communities, enabling shared access to storage, facilitating renewable integration, and enhancing grid resilience. A techno-economic framework is developed to evaluate CBs across multiple markets, combining a comparative review of battery technologies with an optimization model applied to an Australian case study. The analysis considers lithium-ion chemistries (NMC, LFP, LTO) alongside vanadium redox flow batteries, highlighting how their technical properties align with community-scale operational requirements. Results indicate that vanadium redox flow batteries, with their scalability and long lifetimes, achieve cost-effectiveness across a wide range of conditions, whereas high-power lithium-ion technologies become viable only under favorable ancillary service prices. Participation in frequency control ancillary service markets emerges as the dominant factor shaping economic outcomes, with high-power CBs capable of unlocking large annual revenues in specific contexts. Sensitivity analysis confirms that profitability is influenced far more by market and price conditions than by moderate cost variations. These findings provide actionable insights for communities, policymakers, and regulators on the design of supportive frameworks for CBs deployment.