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With $13M in hand, flow battery maker ESS powers up to unseat an energy-storage leader - Portland Business Journal
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New generation of 'flow batteries' could eventually sustain a grid powered by the sun and wind | Science | AAAS
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Iron flow battery company ESS Inc. goes public after ACON S2 Acquisition Corp. merger | Solar Builder
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ESS Inc breaks into Europe's flow battery market with first shipments to Germany - Energy Storage Report
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