BESS revenue stacking refers to the strategy of allocating and maximizing revenue streams generated by a Battery Energy Storage System (BESS) across multiple energy markets and services. This includes stacking income from energy arbitrage, frequency regulation, capacity services, and ancillary services. By stacking revenues, operators aim to optimize the return on investment and ensure profitability in dynamic grid environments. Revenue stacking depends on market participation rules, dispatch algorithms, and real-time asset management, making it a critical concept in energy storage economics.