Battery Filling System (BFS)
BFS (Battery Filling System) reduces operating costs and increases availability of a battery by automatic simultaneous supplementing of water in all cells of a battery. The need of electrolyte filling in lead acid traction cells is mainly due to water loss during battery operation. Water refilling provides a sufficient level and density of the electrolyte and is a crucial factor in battery life. All of the types of PzS and PzB traction cells produced by BATER can be equipped with elements of BFS.