Grid-scale electricity storage technologies play a vital role in balancing electricity supply and demand, particularly as renewable energy sources like wind and solar introduce greater variability into power systems. Lithium-ion batteries, accounting for 90% of U.S. electricity storage capacity, are widely regarded as essential to the clean energy transition. By storing excess electricity during periods of low demand, and thus low prices, and releasing it when demand, and thus price, is high, storage technologies smooth fluctuations in generation and earn significant revenues from arbitrage. Battery operators strategically locate systems in areas with high nodal price variability, but current practices often fail to adapt to changing market conditions, risking inefficient investments with diminishing price spread at selected locations.
Mobile Energy Storage Systems (MESS) present a transformative innovation, enabling both temporal and geographic flexibility in energy storage. Unlike existing Stationary Energy Storage Systems, MESS can be relocated to provide storage services at different points in the grid as market dynamics evolve with rapid addition of transmission and renewable generation capacity. Although MESS technologies currently find niche applications, such as disaster relief, advancements in material technology and declining battery costs make utility-scale adoption plausible. This study addresses a critical gap by modeling MESS fleet operations, analyzing their feasibility, and comparing their financial performance against stationary systems in renewable-rich grids. Our findings aim to guide developers and grid operators in leveraging MESS for enhanced energy flexibility and resilience in renewable-rich grids.…Read More

