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As one of the most promising energy storage technologies, Fe-Cr redox flow battery can improve grid stability and is the optimal energy storage technology with renewable energy sources. Besides, the cost will be as low as that of pumped storage after produced at scale. SPIC has developed 2 kW, 10 kW, 30 kW and 250 kW energy storage product series, and realized localization in all the components. IC-Star, the 31.25 kW Fe-Cr redox flow battery stack independently developed by SPIC, boasts the maximum power output of its kind around the globe.