In addition to the system design, based on a COTS optical sensor, an optimization study has been performed to determine the optimal location and number of spectral channels. The results demonstrate that, using less than 12 channels, measurement errors could potentially be reduced to levels comparable to those achieved with continuous spectra. This study provides a framework for tailoring sensor designs to the specific optical properties of vanadium electrolytes, allowing for increased accuracy while maintaining system simplicity. A key limitation of the optimization study is that it yields different optimum designs for the negolyte and posolyte. Although this provides valuable insight it also highlights a key limitation: the current approach requires a priori knowledge of the specific electrolyte type. Future research should aim to develop a general-purpose sensor capable of analyzing any electrolyte composition without prior distinction between negolyte and posolyte. Such a sensor would be especially useful for electrolyte rebalancing operations, as it would allow equimolar mixtures V III /V IV to be obtained with greater precision and consolidate the system into a single versatile device.