A primary advantage of the VRB-ESS is in its modularity - the separation of the power component and the storage component of the system. A specified power rating is determined by the number of cell stacks maintained in the system while the amount of energy storage capacity required is determined by the amount of electrolyte in litres. If a plant is determined to require a higher power rating, or additional storage capacity is required, simply add additional cell stacks and/or tanks and electrolyte to the system.
