According to China Minmetals Securities, vanadium flow battery energy storage presents a definitive long-term industrial opportunity; however, its commercialisation trajectory hinges on the simultaneous fulfilment of three conditions: sustained long-duration demand, accelerated cost reductions, and expanded resource availability.
The industry is more likely to evolve along a path where high-renewable regions like the northwest take the lead, followed by technological and scale-driven cost declines that fuel broader deployment, and finally, the diffusion of long-duration storage demand across the nation. Going forward, three metrics - the share of storage projects exceeding six hours, the gap in levelised cost of storage (LCOS) between vanadium flow systems and lithium-ion batteries, and the progress of green vanadium extraction from stone coal - will collectively determine the speed at which vanadium flow storage can achieve broader scale.
Global storage expansion and the rising value of long-duration capabilities create substantial headroom for vanadium flow batteries
The global new energy storage market is projected to add roughly 336.3 GWh of new installations in 2025, with a forecast of 1,519.0 GWh by 2035, representing a compound annual growth rate of about 16.3% over the 2025-2035 period. Although lithium-ion batteries currently account for approximately 97.7% of cumulative new energy storage installations, all-vanadium flow batteries - thanks to their decoupled power and capacity ratings, intrinsic safety, extended cycle life, and recyclable electrolyte - are better suited for large-scale, long-duration, and high-frequency cycling applications. The opportunity here is not about replacing lithium-ion outright; rather, it lies in establishing a differentiated competitive position as storage durations continue to lengthen.
Long-duration demand remains underdeveloped, limiting near-term scalability for vanadium technology
One of the key hurdles is that long-duration storage demand has yet to be fully unleashed, leaving the technical advantages of vanadium flow without sufficient application scale in the short term. In 2025, wind and solar power contributed 21.8% of China's electricity generation. In the first half of 2026, the average duration of new new-energy storage projects reached 2.69 hours, with 2-4 hour projects comprising 78% of the total and projects of four hours or more accounting for just 15%. On a national average basis, wind and solar power generation is expected to reach about 46% by 2045 and 62% by 2060, indicating that the nationwide release of long-duration storage demand remains a medium-to-long-term prospect. However, in northwestern regions such as Qinghai and Gansu, where wind and solar penetration already exceeds 30%, demand for 4-8 hour or longer storage is likely to emerge first, serving as a critical springboard for vanadium flow systems to transition from demonstration projects to commercial viability.
Initial capital costs still exceed lithium-ion, though lifecycle economics are improving
A second challenge is the significantly higher upfront investment compared to lithium-ion batteries, although the full-lifecycle economics are starting to show improvement. Currently, the EPC price for a 4-hour vanadium flow storage system is approximately 2.064 yuan/Wh, roughly 2.1 times the 0.971 yuan/Wh for lithium-ion systems of the same duration. Yet the 4-hour LCOS stands at about 0.504 yuan/kWh for vanadium flow versus 0.398 yuan/kWh for lithium-ion, a gap that is notably narrower than the difference in initial capital costs. Under a long-term cost-reduction scenario, the 8-hour LCOS for vanadium flow could fall to about 0.190 yuan/kWh, compared with 0.186 yuan/kWh for lithium-ion, further closing the gap. This suggests that enhancing electrolyte utilisation, boosting stack power density, and advancing standardisation and scale manufacturing could progressively bring vanadium flow systems into a cost-competitive range for long-duration applications.
Vanadium supply constraints stem from cost rather than geological scarcity
A third obstacle is that vanadium resources are not geologically scarce; instead, the existing low-cost supply framework struggles to keep pace with the potential demand generated by storage expansion. If vanadium flow batteries were to capture 5%, 10%, or 20% of the global new energy storage market by 2035, annual vanadium demand would reach approximately 532,000 tonnes, 1.063 million tonnes, and 2.127 million tonnes, respectively, while the current global vanadium industry operates at a scale of just hundreds of thousands of tonnes. In China, low-cost vanadium supply relies primarily on vanadium slag from steel production, whose growth is constrained by steel output. By contrast, vanadium-bearing stone coal resources are abundant and can be expanded independently, but in 2025, vanadium extraction from stone coal yielded only about 7,600 tonnes. Whether green extraction technologies such as salt-free roasting-acid leaching, cascade oxidation roasting, and enhanced leaching can achieve low-cost industrialisation will be pivotal to expanding vanadium supply elasticity.
Risk factors
Key risks include: 1) long-duration storage demand growing slower than anticipated; 2) vanadium flow storage cost reductions lagging other technology pathways; 3) significant volatility in vanadium resource prices; and 4) underdeveloped project revenue mechanisms and business models.