Ess Tech Inc. Replay the stock market charts of GWH day by day, back to 2003. Open long and short positions without spending any money. ESS Tech, Inc., an energy storage company, designs and produces iron flow batteries for commercial and utility-scale energy storage applications worldwide. It offers energy storage products, which include Energy Warehouse, a behind-the-meter solution; and Energy Center, a front-of-the-meter solution. The company was founded in 2011 and is headquartered in Wilsonville, Oregon.
