As the world searches for safe, low-cost big batteries, an old Australian invention is getting new attention

flow battery facility: large green tanks lining the walls of an indoor concrete facility
A 20 MWh flow battery, which stores energy from a wind turbine, at the Fraunhofer Institute for Chemical Technology ICT in Pfinztal, Germany. Credit: Photo by Uli Deck/picture alliance via Getty Images

Going with the flow: the vanadium-based batteries hitting up grids around the world.

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