Abstract: A direct cooling method and system in charging system utilizing a water-based conductive fluid. The charging system includes a conductive fluid reservoir that provides conductive fluid to charging system components. The charging system further defines conductive fluid return paths for the conductive fluid. The length of a fluid path is specified to exceed a minimal resistance threshold based on the product of the resistivity and return path length. The system can include the incorporation of feedback loop into the charging system that can measure the electrical resistance of the conductive fluid.