Vanadium Redox Flow Battery (VRFB) System | 12 Nov 2025

Source:PIB 

The Minister of Power and Housing & Urban Affairs inaugurated India’s largest and first megawatt-hour (MWh)-scale Vanadium Redox Flow Battery (VRFB) system with a 3 MWh capacity. 

• This marks a key milestone in advancing long-duration energy storage (LDES) to strengthen renewable energy integration and grid resilience. 
• Vanadium Redox Flow Battery:  It is a type of electrochemical energy storage system that uses vanadium ions in different oxidation states to store and release electrical energy through redox (reduction–oxidation) reactions. 
  • Unlike conventional batteries, a VRFB stores energy in liquid electrolytes kept in external tanks, making it modular and easily scalable.  
  • Its energy capacity depends on the volume of the electrolyte, while the power output is determined by the size of the cell stack, allowing both to be scaled independently. 
• VRFBs Advantages:  VRFBs are scalable, long-lasting, and efficient, offering fast response, deep discharge, and high safety with non-flammable, recyclable vanadium electrolytes for sustainable energy storage. 
• VRFBs Importance for Renewable Integration: Renewable sources like solar and wind generate power intermittently, depending on weather conditions.  
  • VRFBs store excess solar and wind energy, provide long-duration storage, and enhance grid stability by balancing supply and demand during intermittent generation. 
  • VRFB reduces dependence on imported lithium-ion batteries, strengthens energy security in line with Atmanirbhar Bharat.