Vanadium batteries are far heavier and more expensive, and lithium has ‘first in best served’ status with billions of US dollars having launched the push several years ago. “..Lithium-ion batteries had a big head start as the US government had poured billions into funding Tesla "gigafactories" able to produce the batteries at relatively low cost.
"They had huge capacity available to manufacture lithium batteries," Professor Skyllas-Kazacos said.”.. [so quoted the ABC 12 months ago]
But mainly I think it comes down to the cost (and the fact that the four hour capacity of lithium ion BESSes is enough for most uses)
Thankfully news this week out of China was that more power can be packed into Vanadium stacks which would reduce expense and tgat local company, Surefire, has announced a greener, cheaper, better method for initial processing
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