ESS Tech (GWH) announced significant technical milestones for its iron flow long-duration energy storage system. These milestones include demonstrating 12.2-hour duration at rated power and 17.8-hour duration at reduced power, along with improvements in round trip efficiency and cycling durability. These advancements, resulting from a new material substitution, are expected to reduce material costs and accelerate the company’s cost-down objectives, moving ESS closer to delivering green baseload power.
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