NOVELTY - The non-aqueous redox flow battery (NRFB) system comprises: a catholyte in a positive half-cell (110) separated by a separator (103) from an anolyte in an negative half-cell, and flow cells. The catholyte comprises an ionic conductive chromophore as a catholyte redox active species, and is present in a non aqueous catholyte solution (108) at a concentration of 0.1 M. The flow cells are formed between two electrodes and having the positive half-cell and the negative half-cell. The ionic conductive chromophore is a chromophore having a solubility-enhancing ionic moiety.    USE - Used as a non-aqueous redox flow battery system.    ADVANTAGE - The non-aqueous redo flow battery (NRFB) system exhibits high energy density and improved electro chemical performance.    DETAILED DESCRIPTION - The non-aqueous redox flow battery (NRFB) system comprises: a catholyte in a positive half-cell (110) separated by a separator (103) from an anolyte in an negative half-cell, and flow cells. The catholyte comprises an ionic conductive chromophore as a catholyte redox active species, and is present in a non aqueous catholyte solution (108) at a concentration of 0.1 M. The flow cells are formed between two electrodes and having the positive half-cell and the negative half-cell. The ionic conductive chromophore is a chromophore having a solubility-enhancing ionic moiety. The solubility enhancing ionic moiety is bonded directly to the chromophore through a chemical group, which is bound to the chromophore. The ionic conductive chromophore comprises an electron deficient ring system, a positively charged solubility enhancing ionic moiety, a negatively charged counter ion, a negatively charged solubility-enhancing ionic moiety and a positively charged counter ion. The ionic conductive chromophore has concentration of 0.5 M. The negative half-cell comprises an anolyte in a non-aqueous anolyte solution as an anolyte redox active species at a concentration of 0.1 M. The non-aqueous anolyte solution comprises an organic acid. The negative half-cell includes an anode.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of a hybrid non-aqueous redox flow battery system.    Separator (103)    Positive current collector (105)    Non-aqueous catholyte solution (108)    Source (107)    Positive half-cell. (110)