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1.6GWh for €1B which seems about 5x as expensive as lithium-ion grid scale batteries. https://www.heise.de/en/news/Construction-start-for-world-s-largest-batte

• syntaxing 6mo ago
  Which is actually very impressive. 5X is a good deal, given how much more R&D and economy of scale goes into lithium batteries. Flow batteries have 2-3X more cycles and way safer