Several organic redox systems were investigated as they represent possible 'better' systems for redox flow battery characterisation than aqueous redox couples. All experiments in this work were performed with cyclic voltammetry at room temperature (20°C) and pressure. Rubrene, Ru(acac)3 and [FeCbPy)3](ClO4)2 in acetonitrile were found to exhibit wider potential windows of operation, respectively than aqueous based redox systems (for example the all-vanadium redox flow electrolytes), thereby promising a greater energy output. Due to poor solubility of rubrene in acetonitrile, it has not been found to be a viable redox species for redox flow battery applications. The other organo-metallic redox species were promising to be recommended for further evaluation. Experiments with a stationery H-type cell have been reported in the literature but so far no tests have been conducted with redox flow batteries as yet.