Scientists in China have developed a novel anthraquinone-based solar redox flow battery (SRFB) device that combines a solar cell with a redox flow battery, achieving an average solar-to-electricity conversion efficiency of 4.2% under simulated one sun conditions. The SRFB device utilizes redox couples 2,6-DBEAQ and K4[Fe(CN)6] paired with a triple-junction amorphous-silicon photoelectrode, allowing for photo-charging without an external bias and discharge over 10 cycles with a solar-to-output electricity efficiency of 4.3%. This breakthrough paves the way for advanced solar-to-chemical energy conversion technologies, offering new possibilities for sustainable energy solutions.