DOUBLE-STACK REDOX FLOW BATTERY

Methods and systems are provided for a redox flow battery system. In one example, the redox flow battery system has a set of pressure plates with a sub-stack separator plate arranged between the first pressure plate and the second pressure plate and a first cell stack positioned between the first pressure plate and the sub-stack separator plate. The redox flow battery system may further include a second cell stack positioned between the second pressure plate and the sub-stack separator plate.