Vanadium flow battery sector gets boost "But the commercialisation of the technology to-date has been held back by numerous factors, most notably a higher upfront cost than lithium-ion and a
supply chain that has yet to ramp up to the capacity needed for large-scale projects (outside of China)."
https://www.energy-storage.news/vanadium-flow-battery-sector-gets-boost-with-uk-rental-deal-new-plant-in-germany-and-environmental-impact-whitepaper/
Well, let's hope Largo will be able to sell more than zero batteries this year.