Along the same line of thought: https://www.energy-storage.news/news/german-utility-ewe-wants-to-build-giant-redox-flow-system-in-underground-ca https://www.ene

Along the same line of thought: https://www.energy-storage.news/news/german-utility-ewe-wants-to-build-giant-redox-flow-system-in-underground-ca https://www.energy-storage.news/news/german-utility-ewe-want...