Demonstrates 12 to 17 Hour Duration with Significant RTE Increase Extends Duration for less than $90/kWh WILSONVILLE, Ore. / Jun 26, 2025 / Business Wire / ESS Tech, Inc. (“ESS” or the “Company”) (NYSE:GWH), a leading manufacturer of iron flow long-duration energy storage (LDES) systems for commercial- and utility-scale applications, achieved significant technical milestones in June far ahead of schedule. These milestones... Read More